Formocresol vs Modern Pulpotomy Agents: Safety & Outcomes

Pulpotomy in primary teeth has evolved significantly, transitioning from traditional medicaments like formocresol (FC) to biocompatible materials such as mineral trioxide aggregate (MTA), Biodentine, and ferric sulfate.

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This article critically evaluates safety concerns, clinical outcomes, and current evidence-based recommendations, highlighting why modern agents are increasingly preferred in pediatric dentistry.

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✅ Introduction
For decades, formocresol pulpotomy was considered the gold standard due to its ease of use and high clinical success rates. However, concerns regarding toxicity, systemic distribution, and potential carcinogenicity have prompted a shift toward bioactive and regenerative materials.
Today, clinicians must balance clinical success, biological compatibility, and long-term safety when selecting pulpotomy agents.

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✅ Current Pulpotomy Agents: An Overview

1. Formocresol (FC)
▪️ Fixative agent causing partial devitalization of pulp tissue
▪️ Antibacterial effect
▪️ Historically high success rates
▪️ Concerns: cytotoxicity and systemic exposure to formaldehyde

2. Mineral Trioxide Aggregate (MTA)
▪️ Bioactive material promoting dentin bridge formation
▪️ Excellent sealing ability
▪️ High biocompatibility

3. Biodentine
▪️ Calcium silicate-based material
▪️ Faster setting than MTA
▪️ Stimulates pulp regeneration

4. Ferric Sulfate
▪️ Hemostatic agent
▪️ Comparable outcomes to FC in some studies

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✅ Clinical Outcomes: Evidence-Based Comparison

Success Rates
▪️ Multiple systematic reviews demonstrate that MTA shows superior clinical and radiographic success compared to formocresol
▪️ Long-term data indicate:
- MTA success ≈ 95%
- Formocresol success ≈ 80%
▪️ Meta-analyses confirm statistically significant better outcomes with MTA in primary molars

Radiographic Findings
▪️ FC associated with:
- Internal root resorption
- Pulp canal obliteration
▪️ MTA shows:
- More favorable healing patterns
- Less pathological resorption

Newer Materials
▪️ Recent randomized trials (2024) show NeoMTA and calcium silicate materials outperform FC in both clinical and radiographic success

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✅ Safety Profile: A Critical Issue

Formocresol
▪️ Contains formaldehyde, classified as a potential carcinogen
▪️ Demonstrates:
- Cytotoxicity to pulp and periapical tissues
- Systemic distribution after application
▪️ Safety concerns remain controversial but significant in modern practice

Modern Agents (MTA, Biodentine)
▪️ Highly biocompatible
▪️ Promote tissue regeneration rather than fixation
▪️ Minimal systemic risk

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💬 Discussion
The shift from formocresol to bioactive materials reflects a broader movement toward minimally invasive and biologically driven dentistry.
While FC still demonstrates acceptable short-term outcomes, its mechanism (tissue fixation and devitalization) contradicts current principles of vital pulp therapy, which emphasize preservation and regeneration.
Modern materials such as MTA and Biodentine not only achieve higher success rates but also align with biological healing processes, making them superior choices.

However, barriers remain:
▪️ Higher cost (especially MTA)
▪️ Technique sensitivity
▪️ Availability in low-resource settings

✍️ Conclusion
Formocresol is no longer the ideal pulpotomy agent in contemporary dentistry. Although it provides acceptable clinical outcomes, modern materials outperform it in both safety and long-term success.
MTA and other calcium silicate materials are currently the gold standard due to their:
▪️ Superior biocompatibility
▪️ Higher success rates
▪️ Regenerative potential

🎯 Clinical Recommendations
▪️ Prefer MTA or Biodentine for pulpotomy in primary teeth
▪️ Avoid routine use of formocresol, especially in pediatric patients
▪️ Consider ferric sulfate as an alternative where cost is a concern
▪️ Follow evidence-based guidelines (AAPD) for vital pulp therapy
▪️ Ensure proper case selection and coronal seal

📚 References

✔ Marghalani, A. A., Omar, S., & Chen, J. W. (2014). Clinical and radiographic success of mineral trioxide aggregate compared with formocresol as a pulpotomy treatment in primary molars: A systematic review and meta-analysis. Journal of the American Dental Association, 145(7), 714–721. https://doi.org/10.14219/jada.2014.36
✔ Ghajari, M. F., Mirkarimi, M., Vatanpour, M., & Kharrazi Fard, M. J. (2008). Comparison of pulpotomy with formocresol and MTA in primary molars: A systematic review and meta-analysis. Iranian Endodontic Journal, 3(3), 45–49.
✔ Wang, Y., Luo, S., Tang, W., Yang, L., Liao, Y., & Liu, F. (2022). Efficacy and safety of mineral trioxide aggregate pulpotomy for caries-exposed permanent teeth in children: A systematic review and meta-analysis. Translational Pediatrics, 11(4), 537–546. https://doi.org/10.21037/tp-22-68
✔ Gisour, E. F., Jahanimoghadam, F., & Karimipour, P. (2024). Clinical and radiographic comparison of primary molar pulpotomy using formocresol, Portland cement, and NeoMTA plus: A randomized controlled clinical trial. Scientific Reports, 14, 29690. https://doi.org/10.1038/s41598-024-81180-w
✔ Holan, G., & Fuks, A. B. (2013). A comparison of pulpotomy using formocresol and ferric sulfate. Pediatric Dentistry. (Referenced in systematic reviews)

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Hall Technique vs Pulpotomy: Decision-Making in Deep Caries

Deep caries management in primary teeth remains a clinical challenge, requiring a balance between biological preservation and long-term success.

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PDF 🔽 Hall technique: Complete information for the treatment of carious primary molars ... The objective of the article is to provide adequate information on the Hall technique, indications, contraindications, disadvantages, and the cost-effectiveness of this procedure.

The Hall Technique and pulpotomy represent two evidence-based approaches with distinct philosophies. This review analyzes indications, clinical outcomes, advantages, and limitations, providing a decision-making framework for clinicians.

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✅ Introduction
The management of deep carious lesions in primary teeth has evolved toward minimally invasive dentistry. Traditional approaches such as pulpotomy aim to remove infected pulp tissue, whereas the Hall Technique seals caries without removal.
Understanding the biological basis, patient factors, and clinical indications is essential for optimal outcomes in pediatric patients.

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✅ Clinical Approaches for Deep Caries Management

Hall Technique
The Hall Technique involves placement of a preformed metal crown (PMC) over a carious primary molar without caries removal, tooth preparation, or local anesthesia.
▪️ Mechanism: Seals cariogenic biofilm, depriving bacteria of nutrients
▪️ Indications:
₀ Asymptomatic teeth
₀ No signs of irreversible pulpitis or abscess
₀ Cooperative or anxious pediatric patients
▪️ Contraindications:
Pulpal pathology (pain, fistula, radiolucency)

Pulpotomy
Pulpotomy is a vital pulp therapy procedure involving removal of the coronal pulp, preserving radicular pulp vitality.
▪️ Mechanism: Elimination of infected pulp tissue and placement of medicament (e.g., MTA, Biodentine)
▪️ Indications:
₀ Deep caries with reversible pulpitis
₀ No radicular pathology
▪️ Contraindications:
₀ Necrosis or irreversible pulpitis

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✅ Comparative Clinical Outcomes
▪️ Success rates: Both techniques demonstrate high success rates (>85–90%) in properly selected cases
▪️ Longevity: Hall Technique shows comparable or superior survival due to reduced technique sensitivity
▪️ Patient acceptance: Higher in Hall Technique due to non-invasive nature
▪️ Operator dependency: Higher in pulpotomy, requiring strict asepsis and technique

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💬 Discussion
The key difference lies in treatment philosophy:

▪️ Hall Technique supports a non-invasive, biofilm control approach
▪️ Pulpotomy follows a surgical intervention model
Recent evidence suggests that sealing caries is as effective as removing it, provided the pulp remains vital. However, accurate diagnosis is critical, as misjudging pulpal status may lead to failure.
Additionally, material selection in pulpotomy (e.g., MTA vs formocresol) significantly influences outcomes, with modern biomaterials showing superior biocompatibility.

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✅ Clinical Decision-Making Framework
Clinicians should consider:

▪️ Pulp status (vital vs inflamed)
▪️ Child behavior and cooperation
▪️ Extent of caries and tooth restorability
▪️ Availability of materials and expertise
The Hall Technique is preferred for asymptomatic cases, while pulpotomy is indicated when pulpal inflammation is evident but reversible.

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✍️ Conclusion
Both Hall Technique and pulpotomy are effective for managing deep caries in primary teeth, but their success depends on case selection and diagnosis. Minimally invasive strategies are increasingly favored, positioning the Hall Technique as a first-line option in suitable cases.

🎯 Recommendations
▪️ Use the Hall Technique in asymptomatic deep caries to preserve pulp vitality
▪️ Reserve pulpotomy for cases with confirmed reversible pulp involvement
▪️ Adopt bioactive materials (MTA, Biodentine) in pulpotomy procedures
▪️ Prioritize accurate diagnosis using clinical and radiographic criteria
▪️ Incorporate minimally invasive dentistry principles into pediatric care

📊 Summary Table: Hall Technique vs Pulpotomy in Deep Caries

Clinical Criteria	Hall Technique	Pulpotomy
Invasiveness	Non-invasive, no caries removal	Invasive, requires pulp removal
Pulp Status Requirement	Vital, asymptomatic pulp	Reversible pulpitis
Anesthesia	Usually not required	Required
Technique Sensitivity	Low	High
Patient Acceptance	High	Moderate
Longevity	High survival rates	High with proper technique
Main Limitation	Not suitable for symptomatic teeth	Risk of failure if diagnosis is incorrect

📚 References

✔ Innes, N. P. T., Evans, D. J. P., & Stirrups, D. R. (2007). The Hall Technique: A randomized controlled clinical trial of a novel method of managing carious primary molars in general dental practice. British Dental Journal, 203(11), 1–9. https://doi.org/10.1038/bdj.2007.1110
✔ Innes, N. P. T., Ricketts, D., & Evans, D. J. (2011). Preformed metal crowns for decayed primary molar teeth. Cochrane Database of Systematic Reviews, (12), CD005512. https://doi.org/10.1002/14651858.CD005512.pub3
✔ American Academy of Pediatric Dentistry. (2023). Guideline on pulp therapy for primary and immature permanent teeth. Pediatric Dentistry, 45(6), 384–392.
✔ Holan, G., & Fuks, A. B. (2013). A comparison of pulpotomy using formocresol and ferric sulfate in primary molars: Long-term results. Pediatric Dentistry, 35(2), 129–134.
✔ Cushley, S., Duncan, H. F., Lappin, M. J., Chua, P., Clarke, M., & Elamin, F. (2020). Efficacy of vital pulp therapy in primary teeth: Systematic review and meta-analysis. International Endodontic Journal, 53(10), 1401–1425. https://doi.org/10.1111/iej.13375

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TheraCal in Pediatric Dentistry: Uses, Benefits & Limits

TheraCal is a light-cured, resin-modified calcium silicate material widely used in pediatric dentistry for vital pulp therapy. Its bioactive properties and ease of handling have positioned it as an alternative to traditional materials such as calcium hydroxide and mineral trioxide aggregate (MTA).

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This article reviews the versions, properties, clinical applications, advantages, and limitations of TheraCal in pediatric patients.
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✅ Introduction
Vital pulp therapy in primary dentition requires materials that promote pulp healing, dentin bridge formation, and bacterial control. TheraCal has emerged as a modern biomaterial combining calcium release and resin-based handling properties, addressing some limitations of conventional pulp-capping agents.
Its application in pediatric dentistry is increasing due to its clinical efficiency and reduced chair time, which are critical factors in managing young patients.

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✅ What Is TheraCal?
TheraCal is a light-cured, resin-modified calcium silicate liner/base designed for direct and indirect pulp capping. It releases calcium ions, promoting mineralization and pulp healing.

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✅ Versions of TheraCal

TheraCal LC (Light-Cured):
▪️ Most commonly used version
▪️ Indicated for pulp capping and as a liner

TheraCal PT (Pulpotomy Treatment):
▪️ Designed for pulpotomy procedures
▪️ Enhanced handling and consistency for coronal pulp therapy

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✅ Properties of TheraCal

▪️ Calcium ion release → stimulates reparative dentin formation
▪️ Alkaline pH → antibacterial effect
▪️ Light-curing capability → immediate setting
▪️ Low solubility compared to calcium hydroxide
▪️ Resin-modified matrix → improved handling

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✅ Clinical Uses in Pediatric Dentistry

▪️ Direct pulp capping
▪️ Indirect pulp capping
▪️ Pulpotomy (TheraCal PT)
▪️ Base/liner under restorations

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✅ Benefits and Advantages

▪️ Reduced chair time due to light curing
▪️ Immediate placement of restorative material
▪️ Improved seal and marginal adaptation
▪️ Enhanced patient cooperation in pediatric settings
▪️ Bioactivity supporting dentin bridge formation

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✅ Limitations

▪️ Presence of resin components may affect biocompatibility
▪️ Lower long-term evidence compared to MTA
▪️ Technique sensitivity (requires proper isolation)
▪️ Potential polymerization shrinkage

📊 Step-by-step Instructions: TheraCal Application in Pediatric Dentistry

Clinical Step	Key Action	Clinical Consideration
Diagnosis and Case Selection	Confirm vital pulp and absence of irreversible pathology	Essential for treatment success
Cavity Preparation	Remove caries and clean the cavity	Avoid pulp overexposure when possible
Isolation	Apply rubber dam	Prevents contamination and moisture interference
Material Placement	Apply TheraCal in a thin layer (≤1 mm)	Do not overfill; ensure adaptation
Light Curing	Cure according to manufacturer instructions	Ensure adequate light intensity
Final Restoration	Place definitive restorative material	Immediate restoration is possible

💬 Discussion
TheraCal represents a significant advancement in pulp therapy materials, particularly in pediatric dentistry where efficiency and ease of use are essential. Compared to traditional calcium hydroxide, it demonstrates superior physical properties and reduced solubility.
However, concerns remain regarding its resin content and long-term biological performance, especially when compared to materials such as MTA, which have extensive clinical validation. Current evidence supports its use in selective cases, but emphasizes the importance of proper case selection and technique.

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✍️ Conclusion
TheraCal is a promising biomaterial in pediatric dentistry, offering bioactivity, convenience, and improved clinical handling. While it is not a complete replacement for traditional materials, it serves as a valuable option in vital pulp therapy, particularly when efficiency is required. Further long-term studies are necessary to fully establish its clinical reliability.

🎯 Clinical Recommendations
▪️ Use TheraCal in well-selected vital pulp cases
▪️ Ensure proper isolation to optimize outcomes
▪️ Prefer TheraCal PT for pulpotomy procedures
▪️ Consider alternative materials (e.g., MTA) in cases requiring proven long-term success
▪️ Follow manufacturer instructions for curing time and thickness

📚 References

✔ Bortoluzzi, E. A., Niu, L. N., Palani, C. D., El-Awady, A. R., Hammond, B. D., Pei, D. D., ... & Tay, F. R. (2014). Cytotoxicity and osteogenic potential of silicate calcium cements as potential protective materials for pulpal revascularization. Dental Materials, 30(5), 475–483. https://doi.org/10.1016/j.dental.2014.02.002
✔ Gandolfi, M. G., Siboni, F., Prati, C. (2012). Properties of a novel light-cured calcium-silicate direct pulp capping material. International Endodontic Journal, 45(6), 571–579. https://doi.org/10.1111/j.1365-2591.2012.02014.x
✔ Hebling, J., Lessa, F. C. R., Nogueira, I., & de Souza Costa, C. A. (2019). Cytotoxicity of resin-based light-cured liners applied in deep cavities. Operative Dentistry, 44(3), E97–E105. https://doi.org/10.2341/17-282-L
✔ American Academy of Pediatric Dentistry. (2023). Pulp therapy for primary and immature permanent teeth. The Reference Manual of Pediatric Dentistry.

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Pulpotomy Materials Comparison: Calcium Hydroxide vs. Mineral Trioxide Aggregate (MTA) in Primary Molars

Pulpotomy is a widely accepted vital pulp therapy for primary molars affected by carious exposure or traumatic injury, aiming to preserve the radicular pulp and maintain tooth function until natural exfoliation.

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The selection of an appropriate pulpotomy material is critical, as it directly influences clinical success, pulpal healing, and long-term prognosis. Among the materials most frequently studied, calcium hydroxide (CH) and mineral trioxide aggregate (MTA) have received significant attention due to their biological properties and historical relevance.

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This article provides an updated and evidence-based comparison of these two materials, emphasizing their performance in primary molar pulpotomy from a contemporary pediatric dentistry perspective.

✅ Biological Rationale of Pulpotomy Materials

Calcium Hydroxide
Calcium hydroxide has been traditionally used in vital pulp therapy due to its high alkalinity, antibacterial effect, and ability to stimulate reparative dentin formation. However, its application in primary teeth has shown limitations, including internal resorption and incomplete dentinal bridge formation, which may compromise treatment outcomes.

Mineral Trioxide Aggregate (MTA)
MTA is a bioactive calcium silicate-based material known for its excellent biocompatibility, sealing ability, and capacity to induce hard tissue formation. In primary molars, MTA promotes favorable pulpal responses, including reduced inflammation and consistent dentin bridge formation, contributing to higher long-term success rates.

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✅ Clinical and Radiographic Outcomes
Multiple randomized clinical trials and systematic reviews have demonstrated that MTA exhibits superior clinical and radiographic success compared to calcium hydroxide in primary molar pulpotomy. While CH may provide acceptable short-term outcomes, MTA consistently shows lower rates of pathological root resorption, pulp necrosis, and treatment failure during follow-up periods extending beyond 12 months.

💬 Discussion
The declining use of calcium hydroxide in primary molar pulpotomy is supported by growing evidence highlighting its biological instability in primary pulp tissue. In contrast, MTA has emerged as the reference material due to its predictable healing response and long-term effectiveness. Despite its higher cost and handling complexity, MTA’s advantages outweigh these limitations, particularly in pediatric patients where preservation of primary teeth is essential for occlusal development and space maintenance.

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✍️ Conclusion
Based on current scientific evidence, mineral trioxide aggregate demonstrates superior clinical performance compared to calcium hydroxide in pulpotomy of primary molars. Its enhanced biocompatibility, sealing properties, and reduced risk of internal resorption make MTA the preferred material for vital pulp therapy in primary dentition.

🎯 Clinical Recommendations
▪️ MTA should be considered the material of choice for pulpotomy in primary molars when available.
▪️ Calcium hydroxide should be used with caution due to its association with internal resorption and lower long-term success.
▪️ Proper case selection, hemorrhage control, and coronal sealing remain critical regardless of the material used.
▪️ Long-term clinical and radiographic follow-up is essential to evaluate pulpal response and tooth integrity.

📊 Comparative Table: Calcium Hydroxide vs. MTA in Primary Molar Pulpotomy

Clinical Parameter	Calcium Hydroxide	Mineral Trioxide Aggregate (MTA)
Biocompatibility	Moderate; may induce chronic inflammation	Excellent; promotes favorable pulpal healing
Dentin bridge formation	Inconsistent and porous	Homogeneous and well-organized
Risk of internal resorption	High incidence reported	Minimal to none
Long-term clinical success	Lower success rates over time	High success rates in long-term follow-up

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Pulp therapy for primary and immature permanent teeth. Pediatric Dentistry, 45(6), 403–412.
✔ Agamy, H. A., Bakry, N. S., Mounir, M. M., & Avery, D. R. (2004). Comparison of mineral trioxide aggregate and formocresol as pulp-capping agents in pulpotomized primary teeth. Pediatric Dentistry, 26(4), 302–309.
✔ Holan, G., Eidelman, E., & Fuks, A. B. (2005). Long-term evaluation of pulpotomy in primary molars using mineral trioxide aggregate or formocresol. Pediatric Dentistry, 27(2), 129–136.
✔ Peng, L., Ye, L., Guo, X., Tan, H., Zhou, X., Wang, C., & Li, R. (2007). Evaluation of formocresol versus mineral trioxide aggregate primary molar pulpotomy: A meta-analysis. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology, 104(6), e40–e44.

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Pulpotomy Failure in Primary Teeth: Causes, Early Warning Signs, and Evidence-Based Prevention

Pulpotomy is one of the most common vital pulp therapies in pediatric dentistry, aiming to preserve primary teeth affected by deep caries while maintaining function until natural exfoliation.

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Despite its high success rates when properly indicated, pulpotomy failure remains a clinically relevant concern, often leading to pain, infection, or premature tooth loss.

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Understanding why pulpotomies fail, how to identify early warning signs, and how to prevent unfavorable outcomes is essential for long-term success and optimal pediatric oral health.

✅ What Is Pulpotomy Failure?
Pulpotomy failure occurs when inflammation or infection progresses beyond the coronal pulp, affecting the radicular pulp or surrounding tissues. This failure may be clinical, radiographic, or both, and can appear weeks or months after treatment.
Failure does not necessarily indicate poor technique alone—it is often the result of multifactorial biological and restorative factors.

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✅ Main Causes of Pulpotomy Failure

1. Incorrect Case Selection
Performing pulpotomy on teeth with irreversible pulpitis or necrotic pulp significantly increases failure risk.
➤ Common red flags include:
▪️ Spontaneous pain
▪️ Swelling or sinus tract
▪️ Pathologic mobility
▪️ Furcation radiolucency at baseline

2. Inadequate Hemostasis
Failure to achieve proper hemostasis after coronal pulp removal suggests radicular pulp inflammation, which compromises prognosis.

3. Bacterial Microleakage
Poor coronal seal allows salivary and bacterial contamination, leading to reinfection of the pulp tissue.

4. Suboptimal Restorative Coverage
Lack of full coronal coverage, especially in multi-surface lesions, increases the risk of restoration breakdown and microleakage.

5. Material-Related Factors
Although modern materials show improved outcomes, incorrect manipulation or improper placement can reduce their effectiveness.

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✅ Early Clinical and Radiographic Signs of Failure
Early detection is critical to avoid more invasive treatment.

➤ Clinical Signs
▪️ Persistent or recurrent pain
▪️ Gingival swelling or abscess formation
▪️ Increased tooth mobility
▪️ Sensitivity to percussion

➤ Radiographic Signs
▪️ Furcation radiolucency
▪️ Internal or external root resorption
▪️ Widening of the periodontal ligament
▪️ Periapical pathology
Radiographic follow-up is essential, as some failures remain asymptomatic in early stages.

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💬 Discussion
Recent evidence confirms that pulpotomy success is highly dependent on accurate diagnosis, strict asepsis, and durable coronal restoration. Systematic reviews demonstrate that failures are more commonly linked to diagnostic errors and restorative leakage than to the pulpotomy medicament itself.
Modern bioactive materials have improved outcomes; however, they do not compensate for poor case selection or inadequate isolation. Therefore, pulpotomy should be considered a biologically sensitive procedure, not merely a mechanical intervention.

✅ How to Prevent Pulpotomy Failure

Evidence-Based Preventive Strategies
▪️ Strict adherence to case selection criteria
▪️ Achieve complete hemostasis within a few minutes
▪️ Use rubber dam isolation whenever possible
▪️ Ensure hermetic coronal sealing
▪️ Prefer full-coverage restorations in posterior primary teeth
▪️ Schedule regular clinical and radiographic follow-up
Prevention begins before the bur touches the tooth.

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✍️ Conclusion
Pulpotomy failure in primary teeth is largely preventable when evidence-based protocols are followed. Proper diagnosis, meticulous technique, and durable restoration are far more influential than the choice of medicament alone. Early recognition of failure signs allows timely intervention, preserving function and preventing infection-related complications in pediatric patients.

📊 Comparative Table: Key Factors Influencing Pulpotomy Outcomes

Aspect	Advantages	Limitations
Proper case selection	Improves long-term success and pulp healing	Requires accurate clinical judgment
Effective coronal seal	Prevents bacterial microleakage	Dependent on restoration quality
Full-coverage restoration	Enhances durability and tooth survival	Higher cost and chair time
Regular follow-up	Allows early detection of failure	Relies on patient compliance

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Pulp therapy for primary and immature permanent teeth. Pediatric Dentistry, 45(6), 380–392.
✔ Coll, J. A., Seale, N. S., Vargas, K., Marghalani, A. A., Al Shamali, S., & Graham, L. (2017). Primary tooth vital pulp therapy: A systematic review and meta-analysis. Pediatric Dentistry, 39(1), 16–23.
✔ Holan, G., & Fuks, A. B. (2013). A comparison of pulpotomy using ferric sulfate and mineral trioxide aggregate in primary molars. Pediatric Dentistry, 35(1), 13–18.
✔ Peng, L., Ye, L., Tan, H., & Zhou, X. (2007). Evaluation of the formocresol versus mineral trioxide aggregate primary molar pulpotomy: A meta-analysis. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology, 103(6), e40–e44. https://doi.org/10.1016/j.tripleo.2007.01.008

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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.

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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.

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✅ 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.

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✅ 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.

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✅ 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.

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🔎 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

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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.

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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.

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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.

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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.

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✍️ 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.

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