Why Pulp Therapy Fails: Risk Factors, Clinical Errors, and Evidence-Based Solutions

Pulp therapy is a cornerstone of both pediatric and adult restorative dentistry. However, despite advances in materials and techniques, treatment failure remains a relevant clinical challenge.

📌 Recommended Article :

Dental Article 🔽 Management of Pulpal Infections in Primary Teeth: Evidence-Based Protocols 2025 ... The use of bioactive materials, accurate diagnosis, and periodic follow-up are essential to maintain oral health and prevent premature tooth loss in pediatric patients.

Understanding why pulp therapy fails is essential to improve prognosis, reduce retreatment, and preserve tooth structure. This article reviews the main biological, technical, and restorative factors associated with failure and presents evidence-based solutions supported by current literature.

Advertisement

✅ Biological Risk Factors for Pulp Therapy Failure
Biological factors often determine the baseline prognosis before treatment begins.Key contributors include:

▪️ Incorrect pulp diagnosis (reversible vs. irreversible pulpitis)
▪️ Advanced bacterial contamination
▪️ Undetected pulpal necrosis
▪️ Compromised immune response

Accurate case selection is one of the most critical determinants of pulp therapy success.

📌 Recommended Article :

Dental Article 🔽 Why Formocresol Is No Longer Recommended in Pediatric Pulp Therapy: Evidence-Based Risks and Modern Alternatives ... Current evidence raises serious concerns regarding systemic toxicity, mutagenicity, and potential carcinogenic effects, prompting professional organizations to reconsider its use.

✅ Clinical and Technical Errors
Many failures are directly related to operator-dependent factors.
Common errors include:

▪️ Inadequate isolation, leading to salivary and bacterial contamination
▪️ Incomplete caries removal, leaving infected dentin
▪️ Over-instrumentation or pulp tissue trauma
▪️ Improper placement of pulp capping or pulpotomy materials

Studies consistently show that lack of rubber dam isolation significantly increases failure rates.

📌 Recommended Article :

Dental Article 🔽 Antibiotics Contraindicated During Pregnancy: Risks and Safer Alternatives in Dental Practice ... In dental practice, infections may require systemic antibiotic therapy; however, not all antibiotics are safe during pregnancy.

✅ Material-Related Factors
The choice and handling of materials play a decisive role.
Frequent issues include:

▪️ Incorrect manipulation of calcium-based materials
▪️ Use of outdated or low-biocompatibility agents
▪️ Poor sealing ability of restorative materials

Modern bioactive materials such as mineral trioxide aggregate (MTA) and calcium silicate cements demonstrate superior outcomes due to their biocompatibility, sealing ability, and bioinductive properties.

📌 Recommended Article :

Dental Article 🔽 Understanding Pulpal Diseases: Reversible Pulpitis, Irreversible Pulpitis, and Pulp Necrosis in Adults and Children ... Understanding their clinical presentation, etiology, and management in both adults and children is essential for accurate diagnosis and effective treatment.

✅ Restorative and Post-Treatment Factors
Even a technically correct pulp therapy can fail if the final restoration is inadequate.
Critical aspects:

▪️ Coronal microleakage
▪️ Delayed placement of definitive restoration
▪️ Poor marginal adaptation
▪️ Occlusal overload

A hermetic coronal seal is as important as the pulpal procedure itself.

📊 Comparative Table: Factors Influencing Pulp Therapy Outcomes

Aspect	Advantages	Limitations
Accurate Pulp Diagnosis	Improves case selection and prognosis	Requires clinical experience and diagnostic tools
Use of Bioactive Materials	Promotes dentin bridge formation and healing	Higher cost and technique sensitivity
Rubber Dam Isolation	Reduces bacterial contamination	May be challenging in uncooperative patients
Definitive Coronal Seal	Prevents microleakage and reinfection	Failure if restoration is delayed or poorly adapted

💬 Discussion
Current evidence confirms that pulp therapy failure is rarely due to a single factor. Instead, it is the result of an interaction between biological status, clinical technique, material selection, and restorative quality. Advances in bioactive materials have improved success rates, but they cannot compensate for poor diagnosis or inadequate isolation. Long-term success depends on strict adherence to evidence-based protocols.

📌 Recommended Article :

Dental Article 🔽 Apexogenesis: Step by step procedure ... Apexogenesis is performed on immature teeth with open apices that are affected by caries, trauma, or fractures with pulp exposure. Follow-up and clinical controls are recommended.

🎯 Clinical Recommendations
▪️ Perform thorough pulp vitality and radiographic assessment
▪️ Always use rubber dam isolation
▪️ Select bioactive materials with proven clinical evidence
▪️ Ensure immediate and well-sealed definitive restorations
▪️ Schedule follow-up evaluations to detect early signs of failure

✍️ Conclusion
Pulp therapy fails primarily due to diagnostic errors, inadequate isolation, material misuse, and poor coronal sealing. When evidence-based principles are respected, pulp therapy remains a highly predictable and conservative treatment option. Continuous education and protocol standardization are key to improving clinical outcomes.

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Pulp therapy for primary and immature permanent teeth. The Reference Manual of Pediatric Dentistry, 384–392.
✔ Aguilar, P., & Linsuwanont, P. (2011). Vital pulp therapy in vital permanent teeth with cariously exposed pulp: A systematic review. Journal of Endodontics, 37(5), 581–587. https://doi.org/10.1016/j.joen.2010.12.004
✔ Bogen, G., Kim, J. S., & Bakland, L. K. (2008). Direct pulp capping with mineral trioxide aggregate: An observational study. Journal of the American Dental Association, 139(3), 305–315. https://doi.org/10.14219/jada.archive.2008.0150
✔ Hilton, T. J. (2009). Keys to clinical success with pulp capping: A review of the literature. Operative Dentistry, 34(5), 615–625.

📌 More Recommended Items

► Complete Guide to Pulp Therapy in Primary Teeth: Materials, Techniques, and Success Rates
► Pulp Capping in Dentistry: How the Dental Pulp Is Protected (Updated Clinical Guide)
► CTZ Paste in Primary Teeth Pulp Therapy: Indications, Benefits and Clinical Protocol

Open Apex Management in Traumatized Teeth: Latest Evidence-Based Recommendations

Dental trauma frequently affects immature permanent teeth, particularly in children and adolescents. When trauma occurs before complete root development, it often results in teeth with open apices, posing significant clinical challenges.

📌 Recommended Article :

Dental Article 🔽 Why Formocresol Is No Longer Recommended in Pediatric Pulp Therapy: Evidence-Based Risks and Modern Alternatives ... Current evidence raises serious concerns regarding systemic toxicity, mutagenicity, and potential carcinogenic effects, prompting professional organizations to reconsider its use.

Open apex management in traumatized teeth aims to control infection, preserve tooth structure, and promote continued root development or apical closure using evidence-based techniques.

Advertisement

✅ Understanding Open Apex in Traumatized Teeth
An open apex is characterized by:

▪️ Incomplete root formation
▪️ Thin dentinal walls
▪️ Wide apical foramen

Traumatic injuries such as luxation, avulsion, or complicated crown fractures may compromise pulpal vitality, interrupting root development and increasing the risk of infection and fracture.
Early and accurate diagnosis is critical to determine prognosis and select the most appropriate therapeutic approach.

📌 Recommended Article :

Dental Article 🔽 CTZ Paste in Primary Teeth Pulp Therapy: Indications, Benefits and Clinical Protocol ... The use of CTZ paste (Chloramphenicol–Tetracycline–Zinc Oxide) in primary teeth remains a topic of interest, especially in cases of infected primary molars where traditional pulpectomy is not feasible.

✅ Diagnostic Considerations
Key diagnostic factors include:

▪️ Type and severity of trauma
▪️ Pulp vitality status
▪️ Stage of root development
▪️ Presence of infection or apical pathology

Radiographic evaluation (periapical radiographs or CBCT when indicated) is essential to assess root length, apical diameter, and periapical status.

📌 Recommended Article :

Dental Article 🔽 Bioactive Materials in Pulpotomies: MTA, Biodentine and Emerging Alternatives ... Newer agents such as bioceramic putties continue to expand treatment possibilities. Understanding the clinical performance and limitations of each material is essential for evidence-based decision-making in pulpotomies.

✅ Evidence-Based Treatment Options

➤ Apexification
Apexification is indicated for non-vital immature teeth and aims to create an apical barrier to allow obturation.
Calcium hydroxide (traditional method)
Mineral trioxide aggregate (MTA) or bioceramic materials (modern approach)
Bioceramic apexification has largely replaced long-term calcium hydroxide due to improved outcomes and reduced treatment time.

➤ Regenerative Endodontic Procedures (REPs)
Regenerative endodontics is currently the preferred approach for many immature teeth with necrotic pulps. Benefits include:
▪️ Continued root maturation
▪️ Increased dentinal wall thickness
▪️ Improved fracture resistance
This approach is supported by AAPD and IADT guidelines, particularly in young patients.

➤ Vital Pulp Therapy in Traumatized Teeth
In cases of reversible pulp damage, procedures such as:
▪️ Partial pulpotomy (Cvek pulpotomy)
▪️ Direct pulp capping
may allow continued root development (apexogenesis) when performed promptly.

📊 Comparative Table: Evidence-Based Management Options for Open Apex Teeth

Aspect	Advantages	Limitations
Calcium Hydroxide Apexification	Long history of use, induces apical hard tissue barrier	Long treatment time, increased fracture risk, multiple visits
MTA / Bioceramic Apexification	Shorter treatment time, predictable apical seal, biocompatible	No continued root development, higher material cost
Regenerative Endodontic Procedures	Promotes root maturation and dentinal thickening	Technique-sensitive, variable outcomes
Vital Pulp Therapy	Preserves pulp vitality and allows apexogenesis	Limited to cases with minimal pulpal inflammation

💬 Discussion
Recent evidence supports a paradigm shift toward biologically based therapies, particularly regenerative endodontics, for immature teeth with necrotic pulps. While apexification remains a valid option, it does not promote continued root development, which is critical for long-term tooth survival.
Case selection, patient compliance, and clinician expertise remain decisive factors in treatment success.

📌 Recommended Article :

Dental Article 🔽 Calcium Hydroxide/Iodoform Paste in Primary Teeth Pulpectomies: Benefits and Clinical Evidence ... This article discusses the biological properties, clinical advantages, and mechanisms of action of this paste, comparing it with other obturation materials currently used in pediatric dentistry.

🎯 Clinical Recommendations
▪️ Prioritize pulp vitality preservation whenever possible
▪️ Consider regenerative endodontic procedures as first-line therapy for necrotic immature teeth
▪️ Use bioceramic materials for apexification when regeneration is not feasible
▪️ Ensure long-term follow-up to monitor root development and periapical healing
▪️ Follow IADT and AAPD trauma guidelines strictly

✍️ Conclusion
Management of traumatized teeth with open apices requires an evidence-based, individualized approach. Advances in regenerative endodontics and bioceramic materials have significantly improved clinical outcomes. Early intervention, accurate diagnosis, and adherence to current guidelines are essential to ensure functional and long-lasting results.

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Pulp therapy for primary and immature permanent teeth. The Reference Manual of Pediatric Dentistry.
✔ Diogenes, A., Henry, M. A., Teixeira, F. B., & Hargreaves, K. M. (2013). An update on clinical regenerative endodontics. Endodontic Topics, 28(1), 2–23.
✔ Fouad, A. F., Abbott, P. V., Tsilingaridis, G., et al. (2020). International Association of Dental Traumatology guidelines for the management of traumatic dental injuries. Dental Traumatology, 36(4), 314–330.
✔ Torabinejad, M., & Parirokh, M. (2010). Mineral trioxide aggregate: A comprehensive literature review. Journal of Endodontics, 36(1), 16–27.
✔ American Association of Endodontists. (2021). Clinical considerations for regenerative procedures.

📌 More Recommended Items

► Understanding Pulpal Diseases: Reversible Pulpitis, Irreversible Pulpitis, and Pulp Necrosis in Adults and Children
► Mineral Trioxide Aggregate (MTA) in Pediatric Dentistry: Uses, Benefits, and Clinical Evidence
► Partial Pulpotomy in Pediatric Dentistry: Technique, Benefits, and Key Differences

Why Formocresol Is No Longer Recommended in Pediatric Pulp Therapy: Evidence-Based Risks and Modern Alternatives

For decades, formocresol was considered the gold standard for pulpotomy in primary teeth. Its fixative and antimicrobial properties led to widespread use in pediatric dentistry. However, advances in biomedical research and biocompatible materials have significantly changed clinical practice.

📌 Recommended Article :

Dental Article 🔽 CTZ Paste in Primary Teeth Pulp Therapy: Indications, Benefits and Clinical Protocol ... The use of CTZ paste (Chloramphenicol–Tetracycline–Zinc Oxide) in primary teeth remains a topic of interest, especially in cases of infected primary molars where traditional pulpectomy is not feasible.

Current evidence raises serious concerns regarding systemic toxicity, mutagenicity, and potential carcinogenic effects, prompting professional organizations to reconsider its use.

Advertisement

✅ What Is Formocresol and Why Was It Used?
Formocresol is a compound containing formaldehyde, cresol, glycerin, and water. It was historically used to devitalize radicular pulp tissue in primary teeth.
Its popularity was based on:

▪️ Ease of use
▪️ Low cost
▪️ Short chair time
▪️ Acceptable short-term clinical success

However, success rates alone are no longer sufficient to justify clinical use when patient safety is compromised.

📌 Recommended Article :

Webinar 🔽 Webinar: Pulpectomy: Clinical Tips and Tricks in Paediatric Dentistry ... Pulpectomy is performed when there is an infectious process (fistula or abscess), chronic inflammation, or pulp necrosis.

✅ Evidence-Based Risks of Formocresol
Multiple studies have demonstrated that formaldehyde can diffuse systemically after pulpotomy procedures. Scientific evidence associates formocresol with:

▪️ Cytotoxic and genotoxic effects
▪️ Immune sensitization
▪️ Potential carcinogenicity
▪️ Adverse effects on developing tissues

The International Agency for Research on Cancer (IARC) classifies formaldehyde as a Group 1 carcinogen, raising major concerns for pediatric patients.

📌 Recommended Article :

Dental Article 🔽 Why Hydrogen Peroxide Should Not Be Used in Modern Endodontic Treatment: Evidence-Based Clinical Justification ... Hydrogen peroxide (H₂O₂) was widely used for decades in root canal therapy due to its effervescence and perceived cleaning capability. However, current endodontic literature strongly discourages its use.

✅ Current Guidelines and Professional Consensus
Leading organizations such as the American Academy of Pediatric Dentistry (AAPD) now recommend biocompatible alternatives over formocresol.
Modern pulp therapy focuses on:

▪️ Preservation of radicular pulp vitality
▪️ Promotion of healing and regeneration
▪️ Use of bioactive and calcium silicate–based materials

📌 Recommended Article :

Video 🔽 Apexogenesis: Step by step procedure ... Apexogenesis is performed on immature teeth with open apices that are affected by caries, trauma, or fractures with pulp exposure. Follow-up and clinical controls are recommended.

✅ Modern Alternatives to Formocresol
Several materials have demonstrated equal or superior success rates with improved safety profiles:

▪️ Mineral Trioxide Aggregate (MTA)
▪️ Biodentine
▪️ Calcium hydroxide
▪️ Ferric sulfate

Among these, MTA and Biodentine show the highest long-term clinical and radiographic success.

📊 Comparative Table: Pulpotomy Materials in Pediatric Dentistry

Aspect	Advantages	Limitations
Formocresol	Simple technique; historical clinical familiarity	Toxicity; carcinogenic potential; not biocompatible
Mineral Trioxide Aggregate (MTA)	High success rates; promotes hard tissue formation	Higher cost; longer setting time
Biodentine	Excellent biocompatibility; fast setting	Cost; technique sensitivity
Ferric Sulfate	Hemostatic effect; acceptable clinical outcomes	Does not promote dentin bridge formation
Calcium Hydroxide	Biological compatibility; low cost	Lower long-term success in primary teeth

💬 Discussion
While formocresol played an important historical role, its continued use is inconsistent with modern principles of pediatric dental care. Dentistry has shifted from devitalization toward biological pulp preservation.
The availability of bioactive materials that promote dentin bridge formation and pulp healing eliminates the need for potentially harmful medicaments.

📌 Recommended Article :

Dental Article 🔽 Understanding Pulpal Diseases: Reversible Pulpitis, Irreversible Pulpitis, and Pulp Necrosis in Adults and Children ... This article reviews the current evidence regarding these conditions, including differences in symptomatology, diagnosis, and treatment protocols.

✍️ Conclusion
Formocresol is no longer recommended in pediatric pulp therapy due to well-documented systemic and biological risks. Evidence-based dentistry now prioritizes biocompatibility, safety, and long-term outcomes, making modern alternatives the standard of care.

🔎 Clinical Recommendations
▪️ Avoid the use of formocresol in primary teeth
▪️ Prefer MTA or Biodentine for pulpotomy procedures
▪️ Follow AAPD evidence-based guidelines
▪️ Emphasize pulp vitality preservation
▪️ Educate caregivers about safer treatment options

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Pulp therapy for primary and immature permanent teeth. The Reference Manual of Pediatric Dentistry, 384–392. https://www.aapd.org/research/oral-health-policies--recommendations/pulp-therapy/
✔ International Agency for Research on Cancer. (2012). Formaldehyde. IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Vol. 100F.
✔ Ranly, D. M. (2000). Pulpotomy therapy in primary teeth: New modalities for old rationales. Pediatric Dentistry, 22(5), 403–409.
✔ Fuks, A. B. (2008). Vital pulp therapy with new materials for primary teeth: New directions and treatment perspectives. Pediatric Dentistry, 30(3), 211–219.
✔ Agamy, H. A., Bakry, N. S., Mounir, M. M., & Avery, D. R. (2004). Comparison of mineral trioxide aggregate and formocresol as pulpotomy agents in primary teeth. Pediatric Dentistry, 26(4), 302–309.

📌 More Recommended Items

► Calcium Hydroxide/Iodoform Paste in Primary Teeth Pulpectomies: Benefits and Clinical Evidence
► Management of Pulpal Infections in Primary Teeth: Evidence-Based Protocols 2025
► Calcium Hydroxide in Pediatric Dentistry: Benefits and Limitations

Triple Antibiotic Paste (TAP) in Pediatric Endodontics: Current Clinical Evidence

Triple Antibiotic Paste (TAP) has gained significant attention in pediatric endodontics, particularly in the management of necrotic primary teeth and immature permanent teeth.

📌 Recommended Article :

Dental Article 🔽 Why Hydrogen Peroxide Should Not Be Used in Modern Endodontic Treatment: Evidence-Based Clinical Justification ... Hydrogen peroxide (H₂O₂) was widely used for decades in root canal therapy due to its effervescence and perceived cleaning capability. However, current endodontic literature strongly discourages its use.

Its broad-spectrum antimicrobial activity has made it a key intracanal medicament in regenerative endodontic procedures (REPs) and complex pulpal infections.

Advertisement

Despite its effectiveness, concerns regarding tooth discoloration, cytotoxicity, and antibiotic resistance have prompted ongoing research and clinical debate.

✅ What Is Triple Antibiotic Paste (TAP)?
TAP is a combination of three antibiotics:

▪️ Metronidazole
▪️ Ciprofloxacin
▪️ Minocycline
This formulation targets both aerobic and anaerobic microorganisms, making it particularly effective against polymicrobial endodontic infections.
TAP is primarily used as an intracanal medicament rather than a permanent filling material.

📌 Recommended Article :

Dental Article 🔽 CTZ Paste in Primary Teeth Pulp Therapy: Indications, Benefits and Clinical Protocol ... The use of CTZ paste (Chloramphenicol–Tetracycline–Zinc Oxide) in primary teeth remains a topic of interest, especially in cases of infected primary molars where traditional pulpectomy is not feasible.

✅ Clinical Applications in Pediatric Endodontics
TAP is commonly indicated in:

▪️ Necrotic primary teeth with periapical pathology
▪️ Immature permanent teeth with open apices
▪️ Regenerative endodontic procedures
▪️ Persistent endodontic infections resistant to conventional irrigation

Clinical studies show a significant reduction in bacterial load when TAP is used short-term.

📌 Recommended Article :

Dental Article 🔽 Pulpotomy vs. Pulpectomy in Primary Teeth: A Contemporary Clinical Guide ... Vital pulp therapy in primary teeth is a cornerstone of pediatric dental treatment. Among the most common procedures are pulpotomy, which conserves some of the radicular pulp, and pulpectomy, which removes all pulp tissue.

✅ Advantages of TAP

▪️ Broad-spectrum antimicrobial efficacy
▪️ Effective against Enterococcus faecalis and anaerobic species
▪️ Enhances canal disinfection prior to regenerative procedures
▪️ Improves clinical and radiographic healing outcomes

📌 Recommended Article :

Dental Article 🔽 Calcium Hydroxide/Iodoform Paste in Primary Teeth Pulpectomies: Benefits and Clinical Evidence ... This article discusses the biological properties, clinical advantages, and mechanisms of action of this paste, comparing it with other obturation materials currently used in pediatric dentistry.

✅ Limitations and Safety Concerns
Despite its benefits, TAP presents important limitations:

▪️ Minocycline-induced tooth discoloration
▪️ Potential cytotoxic effects on stem cells
▪️ Risk of antibiotic resistance
▪️ Not recommended for long-term intracanal use

These concerns have led to the development of modified formulations such as Double Antibiotic Paste (DAP) and antibiotic-free alternatives.

📊 Comparative Table: Benefits of Pastes Used in Pulp Therapy

Aspect	Advantages	Limitations
Triple Antibiotic Paste (TAP)	Broad-spectrum antimicrobial action; effective in regenerative procedures	Tooth discoloration; cytotoxicity; antibiotic resistance risk
Double Antibiotic Paste (DAP)	Reduced discoloration risk; effective bacterial control	Still involves antibiotic exposure; limited long-term data
Calcium Hydroxide	High biocompatibility; promotes hard tissue formation	Less effective against resistant bacteria
Ledermix Paste	Anti-inflammatory and antibacterial properties	Contains corticosteroids; limited pediatric indication
Iodoform-Based Pastes	Resorbable; suitable for primary teeth	Limited antimicrobial spectrum

💬 Discussion
Current evidence supports the short-term use of TAP as an effective intracanal medicament, particularly in regenerative endodontics. However, lower concentrations and limited exposure times are strongly recommended to reduce adverse effects.
Recent guidelines emphasize balancing antimicrobial efficacy with biocompatibility, especially in pediatric patients where tissue healing and tooth development are critical.

📌 Recommended Article :

Dental Article 🔽 Calcium Hydroxide in Pediatric Dentistry: Benefits and Limitations ... In pediatric dentistry, calcium hydroxide is used primarily for vital pulp therapy procedures such as direct pulp capping, pulpotomy, and apexogenesis.

✍️ Conclusion
Triple Antibiotic Paste remains a valuable tool in pediatric endodontics when used judiciously. While highly effective in infection control, clinicians must consider its limitations and adhere to evidence-based protocols to ensure safety and long-term success.

🔎 Clinical Recommendations
▪️ Use TAP at low concentrations (≤1 mg/mL)
▪️ Limit intracanal placement to 1–4 weeks
▪️ Avoid use in esthetic zones when possible
▪️ Consider DAP or calcium hydroxide as alternatives
▪️ Follow updated regenerative endodontic guidelines

📚 References

✔ Hoshino, E., Kurihara-Ando, N., Sato, I., Uematsu, H., Sato, M., Kota, K., & Iwaku, M. (1996). In-vitro antibacterial susceptibility of bacteria taken from infected root dentine to a mixture of ciprofloxacin, metronidazole and minocycline. International Endodontic Journal, 29(2), 125–130. https://doi.org/10.1111/j.1365-2591.1996.tb01173.x
✔ American Association of Endodontists. (2023). Clinical considerations for regenerative endodontic procedures. https://www.aae.org/specialty/clinical-resources/regenerative-endodontics/
✔ Diogenes, A., Ruparel, N. B., Shiloah, Y., & Hargreaves, K. M. (2016). Regenerative endodontics: A way forward. Journal of the American Dental Association, 147(5), 372–380. https://doi.org/10.1016/j.adaj.2016.01.018
✔ Ruparel, N. B., Teixeira, F. B., Ferraz, C. C., & Diogenes, A. (2012). Direct effect of intracanal medicaments on survival of stem cells of the apical papilla. Journal of Endodontics, 38(10), 1372–1375. https://doi.org/10.1016/j.joen.2012.06.018

📌 More Recommended Items

► Best Materials for Pulpotomy in Primary Teeth: MTA vs. Biodentine vs. Ferric Sulfate
► Pulp Capping in Dentistry: How the Dental Pulp Is Protected (Updated Clinical Guide)
► Bioactive Materials in Pulpotomies: MTA, Biodentine and Emerging Alternatives

Pulp Necrosis in Primary Teeth: Diagnosis and Evidence-Based Management

Pulp necrosis in primary teeth is a common consequence of untreated caries, trauma, or chronic inflammation.

📌 Recommended Article :

Dental Article 🔽 Understanding Pulpal Diseases: Reversible Pulpitis, Irreversible Pulpitis, and Pulp Necrosis in Adults and Children ... Pulpal diseases represent a continuum of inflammatory conditions that range from reversible pulpitis to irreversible pulpitis and finally to pulp necrosis.

Early detection is crucial to prevent infection, pathological root resorption, and damage to the developing permanent successor. Understanding accurate diagnostic criteria and selecting the appropriate evidence-based treatment is essential for successful outcomes in pediatric patients.

Advertisement

✅ Etiology of Pulp Necrosis in Primary Teeth
Primary teeth are particularly vulnerable to necrosis due to:

▪️ Extensive caries progression
▪️ Anatomically thinner enamel and dentin
▪️ Traumatic dental injuries
▪️ Bacterial invasion of the pulp chamber
▪️ Chronic pulpal inflammation progressing to necrosis

📌 Recommended Article :

Video 🔽 What is Pulpitis? - Causes, symptoms, diagnosis, treatment, pathology ... It explains the main causes such as deep caries, trauma, and bacterial invasion, and details clinical symptoms like spontaneous pain, thermal sensitivity, and referred discomfort.

✅ Clinical and Radiographic Diagnosis
Accurate diagnosis relies on a combination of:

➤ Patient history (spontaneous pain, swelling, trauma)

➤ Clinical signs
▪️ Tooth discoloration (grayish)
▪️ Sinus tract
▪️ Tenderness to percussion
▪️ Gingival swelling

➤ Radiographic findings
▪️ Furcation radiolucency
▪️ Pathological root resorption
▪️ Periodontal space widening
▪️ Loss of lamina dura

In primary teeth, pulp testing methods like thermal or electric tests are unreliable, making radiographic and clinical findings essential.

📌 Recommended Article :

Dental Article 🔽 Pulpotomy vs. Pulpectomy in Primary Teeth: A Contemporary Clinical Guide ... Vital pulp therapy in primary teeth is a cornerstone of pediatric dental treatment. Among the most common procedures are pulpotomy, which conserves some of the radicular pulp, and pulpectomy, which removes all pulp tissue.

✅ Management of Pulp Necrosis in Primary Teeth
Once necrosis is confirmed, vital pulp therapies are contraindicated. Treatment options include:

➤ Pulpectomy
The preferred treatment when the tooth is restorable and the infection can be adequately controlled.
Key principles:
▪️ Thorough canal debridement
▪️ Irrigation with 2.5% sodium hypochlorite or chlorhexidine
▪️ Obturating canals with resorbable materials such as iodoform-based pastes (Vitapex/Metapex)
▪️ Final restoration, ideally with a stainless steel crown

➤ Extraction
Indicated when:
▪️ The tooth is non-restorable
▪️ There is excessive root resorption
▪️ Infection compromises the permanent successor
▪️ Patient cooperation is insufficient

➤ Antibiotics
Not routinely recommended unless:
▪️ Facial cellulitis
▪️ Systemic involvement (fever, malaise)
▪️ Spread of infection

📌 Recommended Article :

Dental Article 🔽 Clinical Pulpectomy Protocol: Updated Step-by-Step Guide ... Pulpectomy is a fundamental procedure in pediatric dentistry for treating primary teeth with pulp inflammation or necrosis. Its main goal is to eliminate infection, maintain tooth functionality until natural exfoliation, and preserve dental space.

✅ Prognosis
Successful pulpectomy has a 70–85% success rate, depending on canal anatomy, irrigation protocol, and obturation material. Failure occurs when infection persists, when restoration is inadequate, or when premature root resorption affects sealing.

📊 Comparative Table: Pulpectomy vs Extraction in Necrotic Primary Teeth

Aspect	Advantages	Limitations
Pulpectomy	Preserves arch space; maintains function; prevents premature tooth loss; avoids malocclusions	Technique sensitive; lower success in multirooted teeth; requires patient cooperation
Extraction	Quick relief of infection; avoids complex instrumentation; suitable for non-restorable teeth	Loss of arch space; risk of mesial drift; possible need for space maintainers

💬 Discussion
Managing necrotic primary teeth requires careful consideration of the child's age, behavior, the strategic value of the tooth, and the proximity to the permanent successor. Resorbable obturation materials remain essential, as non-resorbable materials can interfere with exfoliation. Current research supports the use of iodoform-based pastes due to superior antibacterial activity and predictable resorption.

📌 Recommended Article :

PDF 🔽 Manual of diagnosis and pulp treatment in non-vital primary teeth ... A correct history, clinical and radiographic evaluation is necessary in these cases to determine the appropriate treatment for these cases (dental extraction, pulpectomy, lesion sterilization tissue repair).

🔎 Recommendations
▪️ Use radiographic criteria as the primary diagnostic tool for suspected necrosis.
▪️ Select pulpectomy when infection is localized and the tooth is strategically important.
▪️ Extract teeth with advanced pathology or poor restorative prognosis.
▪️ Avoid antibiotics unless systemic involvement is present.
▪️ Always protect the treated tooth with a stainless steel crown to ensure long-term success.

✍️ Conclusion
Pulp necrosis in primary teeth requires timely diagnosis and evidence-based intervention to prevent complications and safeguard the developing dentition. Pulpectomy remains the treatment of choice for restorable necrotic teeth, while extraction is indicated in severe cases. Proper case selection and modern pediatric endodontic protocols significantly improve outcomes.

📚 References

✔ American Academy of Pediatric Dentistry. (2021). Pulp therapy for primary and immature permanent teeth. AAPD Clinical Guidelines. https://www.aapd.org
✔ Barja-Fidalgo, F., Ribeiro, A., & Pauleto, A. (2011). Clinical and radiographic outcome of primary molars pulpectomies using different filling materials. Journal of Clinical Pediatric Dentistry, 35(4), 359–364. https://doi.org/10.17796/jcpd.35.4.j1471781m0011654
✔ Fuks, A. B. (2008). Pulp therapy for the primary dentition. Pediatric Dentistry, 30(3), 230–236.
✔ Nadin, G., Goel, B. R., & Yeung, C. A. (2003). Pulp treatment for primary teeth. Cochrane Database of Systematic Reviews, (1), CD003220. https://doi.org/10.1002/14651858.CD003220

📌 More Recommended Items

► Myths About Root Canal Treatment
► Pulp Cap and Pulpotomy in Pediatric Trauma Cases
► Apexogenesis: Step by step procedure

Complete Guide to Pulp Therapy in Primary Teeth: Materials, Techniques, and Success Rates

Pulp therapy in primary teeth is a cornerstone of pediatric dentistry, aiming to maintain tooth vitality, prevent infection, and preserve arch space until natural exfoliation.

📌 Recommended Article :

Dental Article 🔽 Why Hydrogen Peroxide Should Not Be Used in Modern Endodontic Treatment: Evidence-Based Clinical Justification ... This article explains why hydrogen peroxide is no longer recommended in endodontic treatments, supported by contemporary scientific evidence.

Advances in biomaterials such as MTA, Biodentine, and improved clinical protocols have significantly increased success rates. Understanding the differences between pulpotomy, pulpectomy, indirect pulp treatment (IPT), and apexification is essential for evidence-based care.

Advertisement

✅ Pulp Therapy Techniques

➤ Indirect Pulp Treatment (IPT)
IPT is indicated when deep caries is present but the tooth remains vital and asymptomatic. Selective caries removal minimizes pulp exposure and promotes remineralization. High-fluoride glass ionomer and resin-modified glass ionomer (RMGI) are widely used as liners.

➤ Direct Pulp Cap (DPC)
Used when a small mechanical pulp exposure occurs. Bioceramics like MTA and Biodentine create a durable dentin bridge and exhibit excellent biocompatibility.

➤ Pulpotomy
Indicated in cases of carious pulp exposure with preserved radicular pulp vitality. Popular medicaments include MTA, Biodentine, and historically formocresol, although the latter is no longer recommended due to toxicity concerns.

➤ Pulpectomy
Indicated for irreversible pulpitis or necrosis. It consists of removing necrotic tissue and obturating canals with resorbable materials such as iodoform-based pastes (Vitapex, Metapex) or zinc oxide–eugenol.

➤ Apexogenesis & Apexification in Young Permanent Teeth
Although not used in primary teeth, they are fundamental when treating immature permanent teeth with open apices.

📌 Recommended Article :

Dental Article 🔽 Understanding Pulpal Diseases: Reversible Pulpitis, Irreversible Pulpitis, and Pulp Necrosis in Adults and Children ... Pulpal diseases represent a continuum of inflammatory conditions that range from reversible pulpitis to irreversible pulpitis and finally to pulp necrosis.

✅ Materials Used in Pulp Therapy

➤ Mineral Trioxide Aggregate (MTA)
Known for high biocompatibility, antibacterial properties, and superior long-term sealing.

➤ Biodentine
A bioactive dentin substitute with faster setting time and strong pulpal healing potential.

➤ Zinc Oxide–Eugenol (ZOE)
Traditional obturation material for primary teeth, but less favorable in cases requiring complete resorption.

➤ Iodoform-based Pastes (Vitapex/Metapex)
Preferred for pulpectomy due to their resorbability and antimicrobial action.

📌 Recommended Article :

Dental Article 🔽 Calcium Hydroxide in Pediatric Dentistry: Benefits and Limitations ... Its biological properties, high alkalinity, and ability to stimulate hard tissue formation have made it a cornerstone in pulp therapy procedures.

✅ Success Rates

▪️ IPT: 90–97% (AAPD, 2021)
▪️ Pulpotomy with MTA: 90–95%
▪️ Pulpotomy with Biodentine: 88–94%
▪️ Pulpectomy: 70–85%, depending on canal anatomy and material used

📊 Comparative Table: Differences Between Pulp Therapy Techniques

Aspect	Advantages	Limitations
Indirect Pulp Treatment (IPT)	High success rates; preserves vitality; minimally invasive	Requires excellent diagnosis; risk of residual caries
Direct Pulp Cap (DPC)	Promotes dentin bridge formation; effective with bioceramics	Not suitable for carious exposures; requires ideal isolation
Pulpotomy	High success with MTA/Biodentine; preserves radicular pulp vitality	Failure if radicular pulp is inflamed or infected
Pulpectomy	Indicated for necrotic teeth; removes infection; allows tooth preservation	Technique sensitive; lower success rates; requires resorbable obturants
Apexogenesis	Allows continued root development	Not applicable to primary teeth
Apexification	Induces apical closure in young permanent teeth	Long treatment time; not used in primary teeth

💬 Discussion
The choice of pulp therapy depends on diagnosis, degree of inflammation, tooth restorability, and patient behavior. Vital pulp therapies (IPT, DPC, pulpotomy) consistently show higher long-term success than pulpectomy. Modern biomaterials like MTA and Biodentine have replaced older agents due to improved healing outcomes and safety profiles.

📌 Recommended Article :

Dental Article 🔽 Medications for Pulp Capping in Primary Teeth: Indications, Composition, and Clinical Management ... Its success largely depends on the material or medication used, which must be biocompatible, promote tissue repair, and provide an adequate marginal seal.

🔎 Recommendations
▪️ Prioritize vital pulp therapies when pulp vitality is preserved.
▪️ Use bioceramics (MTA, Biodentine) as first-line agents.
▪️ Perform pulpectomy only when irreversible pulpitis or necrosis is confirmed.
▪️ Seal treated teeth with stainless steel crowns for long-term success.
▪️ Follow AAPD guidelines for diagnostic criteria and material selection.

✍️ Conclusion
Pulp therapy in primary teeth is highly successful when clinicians use accurate diagnostic criteria and evidence-based materials. Modern biomaterials have improved outcomes and reduced complications, making pulp conservation the preferred approach whenever possible. A clear understanding of each technique ensures predictable and biologically sound results.

📚 References

✔ American Academy of Pediatric Dentistry. (2021). Pulp therapy for primary and immature permanent teeth. AAPD Clinical Guidelines. https://www.aapd.org
✔ Hegde, S., & Bhat, S. S. (2019). Clinical evaluation of MTA and Biodentine as pulpotomy agents in primary teeth. Journal of Indian Society of Pedodontics and Preventive Dentistry, 37(3), 307–315. https://doi.org/10.4103/JISPPD.JISPPD_217_18
✔ Jeon, H. J., Kim, J., & Kim, Y. (2020). Outcomes of vital pulp therapy using bioceramic materials. Restorative Dentistry & Endodontics, 45(3), e32. https://doi.org/10.5395/rde.2020.45.e32
✔ Nowicka, A., Lipski, M., Parafiniuk, M., et al. (2013). Biodentine vs. MTA in direct pulp capping. Journal of Endodontics, 39(6), 743–747. https://doi.org/10.1016/j.joen.2013.01.005

📌 More Recommended Items

► Best Materials for Pulpotomy in Primary Teeth: MTA vs. Biodentine vs. Ferric Sulfate
► Pulp Capping in Dentistry: How the Dental Pulp Is Protected (Updated Clinical Guide)
► CTZ Paste in Primary Teeth Pulp Therapy: Indications, Benefits and Clinical Protocol

Why Hydrogen Peroxide Should Not Be Used in Modern Endodontic Treatment: Evidence-Based Clinical Justification

This article explains why hydrogen peroxide is no longer recommended in endodontic treatments, supported by contemporary scientific evidence. The discussion includes biochemical limitations, risks, and the superiority of modern irrigants such as sodium hypochlorite and EDTA.

📌 Recommended Article :

Dental Article 🔽 Irrigants in Pediatric Pulpectomies: Key Benefits, Properties, and U.S. Commercial Brands ... This article explores the properties, benefits, and most commonly used irrigants in pediatric pulpectomies, including top commercial products used in the United States.

✅ Introduction
Hydrogen peroxide (H₂O₂) was widely used for decades in root canal therapy due to its effervescence and perceived cleaning capability. However, current endodontic literature strongly discourages its use.

Advertisement

Modern research demonstrates that H₂O₂ lacks essential chemical properties needed for root canal disinfection and introduces several clinical risks. Today, evidence-based endodontics prioritizes irrigants that dissolve tissue, eradicate biofilms, and maintain biocompatibility, criteria that hydrogen peroxide fails to meet.

📌 Recommended Article :

Video 🔽 Pulpectomy, everything you need to know: Diagnosis, indications, and filling materials ... The video that we share details everything related to pulpectomy: diagnosis, indications and contraindications, procedure, recommended filling materials, and the importance of post-treatment follow-up.

💬 Discussion

➤ Lack of Organic Tissue Dissolution
A primary goal of irrigation is the dissolution of necrotic and vital pulp tissue. Unlike sodium hypochlorite, hydrogen peroxide cannot break down organic matter, significantly limiting its cleaning and disinfecting effects. Haapasalo et al. (2010) emphasize that irrigants must chemically degrade tissue to support mechanical instrumentation, a function H₂O₂ does not provide.

➤ Insufficient Antimicrobial Effect
Modern studies confirm that hydrogen peroxide has weak antibacterial action and is ineffective against biofilms, particularly Enterococcus faecalis, a key pathogen in persistent endodontic infections (Zehnder, 2006). This makes it inadequate as a primary or adjunctive irrigant.

➤ Risk of Oxygen Release and Subcutaneous Emphysema
Hydrogen peroxide decomposes into water and oxygen gas upon contact with catalase in tissues. This reaction may cause:
▪️ Apical extrusion of gas
▪️ Pain and pressure
▪️ Subcutaneous emphysema, a documented complication (McDonnell et al., 1982)
Because of these risks, contemporary guidelines reject its intracanal use.

➤ No Effect on Smear Layer Removal
EDTA is the gold standard for eliminating smear layer. Hydrogen peroxide cannot chelate or remove inorganic debris, leaving dentinal tubules obstructed and preventing adequate seal and penetration of medicaments or sealers (Torabinejad & Walton, 2015).

➤ Incompatibility with Sodium Hypochlorite
Studies show that mixing or alternating H₂O₂ and NaOCl results in foam production and reduced hypochlorite efficacy, compromising the cleaning process (Zehnder, 2006). This makes hydrogen peroxide incompatible with the irrigant that forms the foundation of modern endodontics.

📌 Recommended Article :

Dental Article 🔽 Medications Used in Pulpotomies: Properties, Drawbacks, and Brand Names ... Selecting the right medication is crucial for clinical success. Below is an overview of the most commonly used pulpotomy agents, their properties, drawbacks, and commercial names.

🔎 Recommendations
Based on current evidence, clinicians should adhere to the following irrigant sequence for predictable outcomes:

1. Sodium hypochlorite (NaOCl) as the primary irrigant
2. EDTA for smear layer removal
3. Final NaOCl rinse or CHX (never mixed with NaOCl)
4. Optional activation (ultrasonic or sonic)
Hydrogen peroxide should not be included under any circumstance.

📌 Recommended Article :

Video 🔽 Apexogenesis: Step by step procedure ... Apexogenesis is a dental treatment that is performed on immature and vital permanent teeth. The objective of this treatment is to allow root growth and apical closure of the tooth.

✍️ Conclusion
Hydrogen peroxide was historically used for its effervescence, but modern endodontics no longer supports its use. Scientific literature consistently demonstrates that it lacks the biochemical properties required for effective canal disinfection, poses clinical risks due to oxygen release, and is inferior to contemporary irrigants. For safe, predictable, and evidence-based treatment, clinicians should rely on NaOCl, EDTA, and irrigant activation protocols, fully abandoning H₂O₂.

📚 References

✔ Haapasalo, M., Shen, Y., Wang, Z., & Gao, Y. (2010). Irrigation in endodontics. Dental Clinics of North America, 54(2), 291–312. https://doi.org/10.1016/j.cden.2009.12.001
✔ McDonnell, G., Russell, A. D., & Hugo, W. B. (1982). The mechanism of hydrogen peroxide action. Journal of Antimicrobial Chemotherapy, 10(5), 389–393.
✔ Torabinejad, M., & Walton, R. E. (2015). Principles and Practice of Endodontics (5th ed.). Saunders.
✔ Zehnder, M. (2006). Root canal irrigants. Journal of Endodontics, 32(5), 389–398. https://doi.org/10.1016/j.joen.2005.09.014

📌 More Recommended Items

► What is the best pulp dressing for pulpotomies in primary teeth? - Review
► Manual of diagnosis and pulp treatment in non-vital primary teeth
► Clinical Pulpectomy Protocol: Updated Step-by-Step Guide

Best Materials for Pulpotomy in Primary Teeth: MTA vs. Biodentine vs. Ferric Sulfate

Pulpotomy remains the most widely used vital pulp therapy for primary teeth with reversible pulp inflammation. Selecting the best materials for pulpotomy in primary teeth is critical for long-term success and maintaining arch integrity.

📌 Recommended Article :

Dental Article 🔽 Pulpotomy vs. Pulpectomy in Primary Teeth: A Contemporary Clinical Guide ... Vital pulp therapy in primary teeth is a cornerstone of pediatric dental treatment. Among the most common procedures are pulpotomy, which conserves some of the radicular pulp, and pulpectomy, which removes all pulp tissue.

Modern evidence supports the use of bioceramic materials due to their biocompatibility and predictable healing, while traditional agents such as ferric sulfate remain in use for their cost-effectiveness. This guide compares MTA, Biodentine, and ferric sulfate, highlighting indications, advantages, limitations, and evidence-based clinical performance.

Advertisement

1. Overview of Pulpotomy Materials

1.1 Mineral Trioxide Aggregate (MTA)
MTA is considered the reference standard due to its biocompatibility, sealing ability, and high clinical success. It promotes dentin bridge formation and demonstrates long-term stability.

1.2 Biodentine
Biodentine is a calcium silicate–based bioceramic with faster setting time than MTA. It has strong mechanical properties and induces predictable odontogenic activity.

1.3 Ferric Sulfate (FS)
Ferric sulfate is a hemostatic agent traditionally used for primary tooth pulpotomy. It functions by forming a coagulation plug that seals blood vessels without directly affecting dentinogenesis.

📌 Recommended Article :

Dental Article 🔽 Partial pulpotomy vs. Conventional (full) pulpotomy in primary teeth — a comparative, evidence-based review ... This article compares partial pulpotomy and conventional (full/coronal) pulpotomy in primary teeth, focusing on definitions, technique differences, materials, clinical outcomes, and benefits.

2. Clinical Performance and Evidence

2.1 Success Rates
▪️ MTA: Studies consistently report success rates above 90% after 24–36 months.
▪️ Biodentine: Demonstrates equivalent or slightly higher success than MTA in some trials.
▪️ Ferric Sulfate: Generally achieves 70–85% success but shows higher incidence of internal resorption.

2.2 Biocompatibility and Safety
Bioceramics (MTA and Biodentine) show superior tissue response with minimal inflammatory infiltrate. Ferric sulfate may cause tissue irritation if improperly applied and lacks regenerative capabilities.

2.3 Handling and Practical Considerations
▪️ MTA has a long setting time and may discolor teeth, especially gray formulations.
▪️ Biodentine sets quickly and exhibits better color stability.
▪️ Ferric sulfate is inexpensive and requires minimal handling time.

📊 Comparative Table: MTA vs. Biodentine vs. Ferric Sulfate

Aspect	Advantages	Limitations
MTA	High biocompatibility, excellent sealing, long-term success	Long setting time, potential discoloration, higher cost
Biodentine	Fast setting, good mechanical properties, color stability	Higher cost than FS, requires strict handling protocol
Ferric Sulfate	Low cost, easy handling, effective hemostasis	Higher internal resorption risk, no regenerative effect

💬 Discussion
Current evidence clearly favors bioceramic materials (MTA and Biodentine) due to their biological compatibility, regenerative capacity, and consistently high success rates. While ferric sulfate remains a viable option in resource-limited settings, its higher association with internal resorption and lack of true tissue healing mechanisms make it less ideal compared with bioceramic alternatives.
From a clinical standpoint, the choice of material should consider cost, setting time, operator experience, patient behavior, and long-term prognosis.

📌 Recommended Article :

Dental Article 🔽 Mineral Trioxide Aggregate (MTA) in Pediatric Dentistry: Uses, Benefits, and Clinical Evidence ... Preserving primary teeth until their natural exfoliation is a key goal in pediatric dentistry. Advances in bioactive materials have made this more predictable.

✍️ Conclusion
MTA and Biodentine are the most effective and biologically favorable materials for pulpotomy in primary teeth. Biodentine offers practical advantages such as faster setting and better color stability, while MTA remains a robust gold standard with extensive evidence. Ferric sulfate may be used when bioceramics are unavailable, but it shows lower long-term predictability.
For optimal patient outcomes, clinicians should prioritize bioceramic-based pulpotomy protocols aligned with current scientific evidence.

🔎 Recommendations
▪️ Prefer Biodentine or MTA for routine pulpotomies in primary molars.
▪️ Use ferric sulfate only when bioceramic materials are unavailable or cost-prohibitive.
▪️ Avoid gray MTA formulations in esthetic zones due to discoloration risks.
▪️ Ensure effective hemostasis before applying any pulpotomy agent.
▪️ Perform periodic radiographic follow-up at 6 and 12 months, then annually.

📚 References

✔ Camilleri, J. (2020). Mineral trioxide aggregate: Advances and challenges. Dental Materials, 36(3), 288–296.
✔ Rashid, H., & Sheikh, Z. (2021). Biodentine vs. mineral trioxide aggregate: An updated review. International Journal of Endodontics, 54(2), 123–136.
✔ Vasundhara, S., & Sridhar, N. (2022). Success rates of pulpotomy medicaments in primary teeth: A systematic review. Journal of Clinical Pediatric Dentistry, 46(1), 44–53.
✔ American Academy of Pediatric Dentistry (AAPD). (2023). Guideline on Pulp Therapy for Primary and Immature Permanent Teeth. AAPD.
✔ Coll, J. A., et al. (2020). Vital pulp therapy in primary teeth: A systematic review. Pediatric Dentistry, 42(5), 337–349.

📌 More Recommended Items

► Pulpotec® in Pulpotomy: Composition, Indications, Protocol & Clinical Pros and Cons
► What is the best pulp dressing for pulpotomies in primary teeth? - Review
► Video: Pulpotomy of Deciduous Molar - Step by step

Pulp Capping in Dentistry: How the Dental Pulp Is Protected (Updated Clinical Guide)

Pulp capping is a key minimally invasive procedure used to preserve the vitality of the dental pulp after exposure or near exposure due to caries or trauma.

📌 Recommended Article :

Sental Article 🔽 Calcium Hydroxide in Pediatric Dentistry: Benefits and Limitations ... Calcium hydroxide has been one of the most widely used biomaterials in pediatric dentistry for several decades. Its biological properties, high alkalinity, and ability to stimulate hard tissue formation have made it a cornerstone in pulp therapy procedures.

Modern bioactive materials—including calcium hydroxide, MTA, and Biodentine—have significantly improved success rates by promoting dentin bridge formation and reducing pulpal inflammation.

Advertisement

✅ What Is Pulp Capping?
Pulp capping is a conservative dental procedure in which a biocompatible and bioactive material is placed over the pulp or affected dentin to stimulate healing, reduce inflammation, and promote reparative dentin formation. It is indicated in cases of:

▪️ Deep caries approaching the pulp
▪️ Mechanical exposure during cavity preparation
▪️ Traumatic exposure in young teeth with open apices
▪️ Reversible pulpitis

Two main types exist:
▪️ Direct pulp capping – placed directly over an exposed pulp.
▪️ Indirect pulp capping – placed over deep dentin close to the pulp but without exposure.

📌 Recommended Article :

Dental Article 🔽 Understanding Pulpal Diseases: Reversible Pulpitis, Irreversible Pulpitis, and Pulp Necrosis in Adults and Children ... Pulpal diseases represent a continuum of inflammatory conditions that range from reversible pulpitis to irreversible pulpitis and finally to pulp necrosis.

✅ Mechanism of Action
Modern pulp-capping materials protect the pulp through several biological processes:

▪️ Antibacterial activity (e.g., calcium hydroxide has high pH).
▪️ Sealing ability that prevents microleakage.
▪️ Bioactivity, stimulating odontoblast-like cell differentiation.
▪️ Release of calcium ions, promoting mineralization and dentin bridge formation.
▪️ Reduction of pulpal inflammation and support of tissue regeneration.

📌 Recommended Article :

Dental Article 🔽 Pulp Therapy in Pediatric Dentistry: Complete and Updated Guide ... Pulp therapy in pediatric dentistry includes a wide range of procedures aimed at preserving pulp health and tooth function in both primary and immature permanent teeth.

✅ Common Materials and Commercial Names

1. Calcium Hydroxide (Ca(OH)₂)
Commercial names: Dycal®, Life®, Calcimol®
Key actions: High pH antibacterial effect; stimulates mineralized bridge formation.

2. Mineral Trioxide Aggregate (MTA)
Commercial names: ProRoot® MTA, MTA Angelus®
Key actions: Excellent sealing, biocompatibility, promotes strong dentin bridge formation.

3. Biodentine® (Tricalcium Silicate Cement)
Commercial name: Biodentine® (Septodont)
Key actions: Bioactivity, fast setting time, high mechanical strength, pulp regeneration support.

4. Resin-Modified Calcium Silicate Materials
Commercial names: TheraCal LC®, BioCal®
Key actions: Light-cured convenience, calcium release, improved handling properties.

📊 Comparative Table: Pulp Capping Materials

Aspect	Advantages	Limitations
Calcium Hydroxide	Antibacterial; inexpensive; widely available	Poor long-term seal; tunnel defects in dentin bridge
MTA	Excellent sealing; high biocompatibility; strong dentin bridge	Long setting time; higher cost; potential discoloration

💬 Discussion
Advances in bioceramic materials have transformed pulp protection, offering predictable outcomes with high long-term vitality rates. MTA and Biodentine outperform traditional calcium hydroxide in sealing ability and dentin bridge quality, although calcium hydroxide remains widely used due to affordability and ease of application. Material selection depends on exposure type, tooth vitality, patient age, and clinical resources.

📌 Recommended Article :

Dental Article 🔽 CTZ Paste in Primary Teeth Pulp Therapy: Indications, Benefits and Clinical Protocol ... The use of CTZ paste (Chloramphenicol–Tetracycline–Zinc Oxide) in primary teeth remains a topic of interest, especially in cases of infected primary molars where traditional pulpectomy is not feasible.

✍️ Conclusion
Modern pulp capping techniques effectively protect the dental pulp, arrest inflammation, and promote natural dentin regeneration. Evidence consistently supports bioactive materials—particularly MTA and Biodentine—as the gold standard for vital pulp therapy. Appropriate case selection and strict isolation significantly increase long-term success.

🔎 Recommendations
▪️ Use rubber dam isolation to prevent contamination during pulp capping.
▪️ Prefer MTA or Biodentine for direct exposures in young permanent teeth.
▪️ Use indirect pulp capping when possible to avoid unnecessary pulpal exposure.
▪️ Follow up clinically and radiographically at 6 and 12 months.
▪️ Educate patients about symptoms of pulpal complications (persistent pain, swelling).

📚 References

✔ Bjørndal, L., & Ludwig, S. (2022). Management of deep caries and pulpal protection strategies. International Endodontic Journal, 55(Suppl. 1), 59–73. https://doi.org/10.1111/iej.13743
✔ Celik, E. U., & Unever, S. (2020). Success rates of pulp capping materials in vital pulp therapy. Journal of Endodontics, 46(8), 1061–1067. https://doi.org/10.1016/j.joen.2020.04.008
✔ Cox, C. F., Subay, R. K., Suzuki, S., & Suzuki, S. H. (2017). Pulp capping materials: A review of the literature. Dental Materials, 33(7), 745–758. https://doi.org/10.1016/j.dental.2017.03.006
✔ Torabinejad, M., & Parirokh, M. (2010). Mineral trioxide aggregate: A comprehensive literature review. Part II: Clinical applications. Journal of Endodontics, 36(2), 190–202. https://doi.org/10.1016/j.joen.2009.09.010

📌 More Recommended Items

► Bioactive Biomaterials in Pulp Therapy and Necrosis Management in Pediatric Dentistry
► Vital Pulp Therapy in Primary Teeth: Evidence-Based Approaches
► Webinar: Bioceramics in Pediatric Dentistry - Dr. Patrick Ruck

CTZ Paste in Primary Teeth Pulp Therapy: Indications, Benefits and Clinical Protocol

The use of CTZ paste (Chloramphenicol–Tetracycline–Zinc Oxide) in primary teeth remains a topic of interest, especially in cases of infected primary molars where traditional pulpectomy is not feasible.

📌 Recommended Article :

Dental Article 🔽 Management of Pulpal Infections in Primary Teeth: Evidence-Based Protocols 2025 ... This 2025 update provides a concise, evidence-based overview of pulpal infection management in primary teeth, following the latest AAPD 2024 classification and clinical protocols.

This article presents an updated, evidence-based analysis of its indications, clinical technique, advantages, limitations, and safety considerations.

Advertisement

✅ Introduction
The CTZ technique, also known as Lesion Sterilization and Tissue Repair (LSTR), aims to disinfect infected primary teeth by using a topical antibiotic mixture sealed within the pulp chamber. Unlike full pulpectomy, this approach promotes infection control without extensive instrumentation, making it useful in pediatric patients with limited cooperation.
However, concerns regarding antibiotic resistance, systemic absorption, and use of chloramphenicol and tetracycline in children have prompted ongoing debate. Updated guidelines emphasize strict case selection and avoidance of CTZ when safer alternatives (e.g., Vitapex, Ca(OH)₂–iodoform pastes) are available.

📌 Recommended Article :

Dental Article 🔽 Pulpotomy vs. Pulpectomy in Primary Teeth: A Contemporary Clinical Guide ... Among the most common procedures are pulpotomy, which conserves some of the radicular pulp, and pulpectomy, which removes all pulp tissue.

✅ Composition of CTZ Paste
CTZ paste typically contains:

▪️ Chloramphenicol (250 mg)
▪️ Tetracycline (250 mg)
▪️ Zinc oxide
▪️ Eugenol or propylene glycol as vehicle

Some variations replace tetracycline with metronidazole or eliminate eugenol.

✅ Mechanism of Action

▪️ Broad-spectrum antibacterial effect against anaerobic and facultative bacteria involved in primary tooth infections.
▪️ Promotes partial tissue repair through reduction of bacterial load.
▪️ Works without canal instrumentation, relying on diffusion through dentinal tubules.

📌 Recommended Article :

Dental Article 🔽 Bioactive Biomaterials in Pulp Therapy and Necrosis Management in Pediatric Dentistry ... This article explores their mechanisms, techniques, clinical protocols, and compares them to traditional materials such as formocresol and zinc oxide-eugenol.

✅ Clinical Indications
CTZ paste is indicated when:

▪️ The child cannot tolerate conventional pulpectomy.
▪️ Canals are severely obstructed, resorbed, or inaccessible.
▪️ There is chronic infection, fistula, or abscess associated with a restorable tooth.
▪️ Treatment aims to maintain the primary tooth short-term until natural exfoliation or eruption of the successor.

✅ Contraindications

▪️ Children with allergy to chloramphenicol, tetracycline, or eugenol.
▪️ When the tooth is non-restorable.
▪️ Presence of advanced pathological resorption or mobile tooth near exfoliation.
▪️ Patients with systemic conditions requiring antibiotic stewardship.
▪️ When the tooth can receive conventional pulpectomy.

📌 Recommended Article :

Dental Article 🔽 Understanding Pulpal Diseases: Reversible Pulpitis, Irreversible Pulpitis, and Pulp Necrosis in Adults and Children ... Pulpal diseases represent a continuum of inflammatory conditions that range from reversible pulpitis to irreversible pulpitis and finally to pulp necrosis.

✅ Clinical Procedure

1. Local anesthesia and isolation.
2. Removal of coronal pulp and carious tissue.
3. Irrigation with saline or chlorhexidine (no instrumentation of canals).
4. Placement of a thin layer of CTZ paste on chamber floor.
5. Seal with reinforced glass ionomer cement.
6. Final restoration with stainless steel crown, whenever possible.

✅ Benefits

▪️ Requires minimal cooperation, ideal for uncooperative children.
▪️ Effective in reducing clinical signs of infection.
▪️ Faster than pulpectomy.
▪️ Useful in public health settings or emergency care.

📌 Recommended Article :

Dental Article 🔽 Mineral Trioxide Aggregate (MTA) in Pediatric Dentistry: Uses, Benefits, and Clinical Evidence ... Among them, Mineral Trioxide Aggregate (MTA) has emerged as a gold standard for pulp therapy, especially for its regenerative properties and sealing capability.

✅ Limitations and Safety Concerns

▪️ Potential risk of antibiotic resistance.
▪️ Chloramphenicol carries risk of systemic absorption (rare but serious).
▪️ Tetracycline may cause tooth discoloration when absorbed systemically.
▪️ Lower long-term success compared with proper pulpectomy techniques.

📊 Comparative Table: CTZ Paste vs Conventional Pulpectomy

Aspect	Advantages	Limitations
CTZ Paste	Minimal instrumentation; fast; good for uncooperative children	Antibiotic exposure; lower long-term success; limited indications
Conventional Pulpectomy	Biocompatible materials; higher long-term success; well-documented evidence	Longer procedure; requires cooperation; technically demanding

💬 Discussion
Although CTZ paste can be effective in selected cases, its use must be ethical and evidence-based. Current pediatric dentistry guidelines favor biocompatible materials (e.g., MTA, Biodentine, Vitapex, Ca(OH)₂) due to better long-term outcomes and absence of systemic antibiotic risks.
Nevertheless, CTZ paste remains a valuable alternative in:

▪️ Remote or resource-limited environments
▪️ Patients with behavioral management challenges
▪️ Complex anatomy preventing conventional therapy

The decision should always consider risk–benefit, parental counseling, and tooth prognosis.

📌 Recommended Article :

PDF 🔽 Manual of diagnosis and pulp treatment in non-vital primary teeth ... Non-vital teeth are those whose nerves lack vitality and there is no blood flow inside. This may be due to deep caries or dental trauma that irreversibly affects the dental pulp.

✍️ Conclusion
CTZ paste is an alternative pulp therapy for infected primary teeth when conventional treatment is not feasible. Its effectiveness relies on infection control, but concerns about antibiotic exposure and resistance require strict clinical judgment. When used appropriately, CTZ can help maintain primary teeth temporarily, supporting occlusal development until natural exfoliation.

🔎 Recommendations
▪️ Prefer standard pulpectomy when feasible.
▪️ Reserve CTZ for special circumstances and always inform parents about risks.
▪️ Follow-up radiographs every 3–6 months.
▪️ Always restore with full-coverage restoration.
▪️ Consider newer biocompatible pastes as first choice.

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Pulp therapy for primary and immature permanent teeth. AAPD Clinical Guidelines.
✔ Bimstein, E., & Rotstein, I. (2019). Root canal treatment for children and adolescents. Springer Nature.
✔ Nakornchai, S., Banditsing, P., & Visetratana, N. (2020). Clinical evaluation of LSTR/CTZ therapy in primary teeth. International Journal of Paediatric Dentistry, 30(4), 500–507.
✔ Primosch, R., & Glomb, T. (2018). Vital pulp therapy in primary teeth: Current concepts. Pediatric Dentistry, 40(5), 315–322.

📌 More Recommended Items

► Bioactive Materials in Pulpotomies: MTA, Biodentine and Emerging Alternatives
► Calcium Hydroxide/Iodoform Paste in Primary Teeth Pulpectomies: Benefits and Clinical Evidence
► Pulpotec® in Pulpotomy: Composition, Indications, Protocol & Clinical Pros and Cons