Fluoride Varnish vs. Silver Diamine Fluoride: Clinical Roles in Caries Prevention and Arrest

Dental caries remains one of the most prevalent chronic diseases worldwide, affecting both pediatric and adult populations. Contemporary minimally invasive dentistry emphasizes caries prevention, early intervention, and lesion arrest, rather than operative treatment alone.

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Dental Article 🔽 Latest FDA Guidelines (2025) on Fluoride Use in Children: What Dentists Need to Know ... This article analyzes the 2025 FDA updates on fluoride use in children, focusing on systemic (ingestible) restrictions, safety concerns, and clinical implications.

Among non-invasive strategies, fluoride varnish (FV) and silver diamine fluoride (SDF) have emerged as key agents with distinct clinical roles. Although both are fluoride-based therapies, their mechanisms of action, indications, and outcomes differ significantly, making their correct clinical selection essential.

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✅ Mechanism of Action

Fluoride Varnish
Fluoride varnish typically contains 5% sodium fluoride (22,600 ppm fluoride). Its primary mechanism includes:
▪️ Promotion of enamel remineralization
▪️ Formation of fluorapatite, increasing acid resistance
▪️ Inhibition of bacterial metabolism at low levels
▪️ Sustained fluoride release due to prolonged contact with enamel
Fluoride varnish is most effective in non-cavitated lesions and for caries prevention.

Silver Diamine Fluoride
Silver diamine fluoride contains 38% SDF, composed of silver ions, fluoride ions, and ammonia. Its mechanisms include:
▪️ Antibacterial action through silver-induced protein denaturation
▪️ Arrest of dentinal caries by inhibiting collagen degradation
▪️ Fluoride-driven remineralization of affected dentin
▪️ Increased dentin hardness and resistance to further demineralization
SDF is uniquely effective for active cavitated lesions, particularly in dentin.

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✅ Clinical Characteristics
▪️ Fluoride varnish is colorless to yellowish, well tolerated, and esthetically acceptable.
▪️ Silver diamine fluoride causes permanent black staining of carious dentin, which is a known and expected outcome.
▪️ FV requires multiple applications over time for optimal preventive effect.
▪️ SDF can arrest caries with fewer applications, even in high-risk patients.

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✅ Clinical Use and Indications

Indications for Fluoride Varnish
▪️ Caries prevention in high-risk patients
▪️ Early enamel lesions (white spot lesions)
▪️ Patients with orthodontic appliances
▪️ Xerostomia or reduced salivary flow
▪️ Community and school-based preventive programs

Indications for Silver Diamine Fluoride
▪️ Arrest of cavitated carious lesions
▪️ Young children with limited cooperation
▪️ Patients with special health care needs
▪️ Elderly or medically compromised patients
▪️ Situations where conventional restorative care is delayed or contraindicated

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✅ Limitations and Considerations

Fluoride Varnish
▪️ Limited effect on established dentinal caries
▪️ Requires repeated applications
▪️ Preventive rather than therapeutic in advanced lesions

Silver Diamine Fluoride
▪️ Unesthetic black staining of treated lesions
▪️ Metallic taste reported by some patients
▪️ Not intended for teeth requiring immediate esthetic restoration
▪️ Informed consent is essential due to visible discoloration

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💬 Discussion
Comparing fluoride varnish and silver diamine fluoride is clinically appropriate, provided their different therapeutic objectives are clearly defined. Fluoride varnish is a preventive agent, designed to strengthen enamel and reduce future caries risk. In contrast, SDF is a therapeutic agent, capable of arresting active dentinal caries. Rather than competing interventions, they represent complementary tools within a risk-based caries management approach.

✍️ Conclusion
Fluoride varnish and silver diamine fluoride play distinct yet complementary roles in modern caries management. Fluoride varnish is ideal for prevention and early intervention, while SDF is uniquely effective for arresting cavitated lesions, especially in vulnerable populations. Proper case selection, patient education, and informed consent are critical to maximize clinical success.

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🎯 Clinical Recommendations
▪️ Use fluoride varnish for routine preventive care and early lesions.
▪️ Reserve silver diamine fluoride for active cavitated caries when conventional treatment is not feasible.
▪️ Clearly explain esthetic outcomes when using SDF.
▪️ Integrate both agents into a minimally invasive, evidence-based caries management protocol.

📊 Comparative Table: Additional Caries Preventive Products

Preventive Product	Primary Benefits	Clinical Limitations
Pit and Fissure Sealants	Physical barrier against plaque accumulation in occlusal surfaces	Technique-sensitive; requires moisture control
Fluoridated Toothpaste	Daily low-dose fluoride exposure for enamel remineralization	Effectiveness depends on patient compliance
Fluoride Mouthrinses	Adjunctive caries prevention in high-risk individuals	Not recommended for very young children due to ingestion risk
CPP-ACP Products	Enhances calcium and phosphate availability for remineralization	Limited evidence compared to fluoride-based therapies

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Policy on the use of silver diamine fluoride for pediatric dental patients. Pediatric Dentistry, 45(6), 66–70.
✔ Crystal, Y. O., & Niederman, R. (2019). Evidence-based dentistry update on silver diamine fluoride. Dental Clinics of North America, 63(1), 45–68.
✔ Gao, S. S., Zhao, I. S., Hiraishi, N., Duangthip, D., Mei, M. L., Lo, E. C. M., & Chu, C. H. (2016). Clinical trials of silver diamine fluoride in arresting caries. Journal of Dentistry, 48, 1–7.
✔ Marinho, V. C. C., Worthington, H. V., Walsh, T., & Clarkson, J. E. (2013). Fluoride varnishes for preventing dental caries. Cochrane Database of Systematic Reviews, (7), CD002279.
✔ Chu, C. H., Mei, L., Seneviratne, C. J., & Lo, E. C. M. (2012). Effects of silver diamine fluoride on dentine caries lesions. Journal of Dentistry, 40(11), 1024–1031.

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Surgical Techniques for Third Molar Extraction: Definitions, Indications, and Clinical Advantages

The extraction of third molars is one of the most frequently performed oral surgical procedures worldwide. Due to their variable position, eruption pattern, and anatomical relationship with vital structures, third molars often require specific surgical techniques rather than simple exodontia.

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A comprehensive understanding of these techniques allows clinicians to reduce complications, improve healing, and optimize patient outcomes. This article reviews the most commonly used surgical techniques for third molar extraction, focusing on their definitions, clinical characteristics, and advantages.

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✅ Main Surgical Techniques for Third Molar Extraction

1. Simple Surgical Extraction
This technique is indicated for fully erupted third molars with favorable angulation and minimal bone resistance. It involves the use of elevators and forceps without flap elevation or bone removal.
Advantages:
▪️ Short surgical time
▪️ Minimal postoperative morbidity
Characteristics:
▪️ Limited to erupted teeth
▪️ Requires adequate crown exposure

2. Surgical Extraction with Mucoperiosteal Flap
A mucoperiosteal flap is raised to gain adequate access to partially erupted or impacted third molars.
Advantages:
▪️ Improved visibility and access
▪️ Better control of surgical field
Characteristics:
▪️ Requires suturing
▪️ Moderate postoperative discomfort

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3. Osteotomy-Assisted Extraction
Osteotomy involves controlled removal of surrounding alveolar bone using rotary instruments or piezoelectric devices.
Advantages:
▪️ Reduces excessive force during extraction
▪️ Allows safer removal of deeply impacted teeth
Characteristics:
▪️ Increased surgical complexity
▪️ Requires precise anatomical knowledge

4. Odontosection
Odontosection consists of sectioning the crown and/or roots to facilitate removal in segments.
Advantages:
▪️ Minimizes bone removal
▪️ Decreases risk of mandibular fracture
Characteristics:
▪️ Commonly combined with osteotomy
▪️ Particularly useful in mesioangular or horizontal impactions

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5. Piezoelectric Surgery
This technique uses ultrasonic vibrations to perform selective bone cutting while preserving soft tissues.
Advantages:
▪️ Reduced risk of nerve injury
▪️ Improved postoperative healing
Characteristics:
▪️ Longer operative time
▪️ Requires specialized equipment

6. Coronectomy
Coronectomy involves removal of the crown while intentionally leaving the roots in situ.
Advantages:
▪️ Significantly reduces risk of inferior alveolar nerve injury
Characteristics:
▪️ Strict case selection required
▪️ Requires long-term radiographic follow-up

📊 Comparative Table: Clinical Characteristics of Third Molars

Clinical Feature	Surgical Relevance	Potential Complications
Impaction depth	Determines need for osteotomy or flap	Increased surgical difficulty
Angulation	Affects choice of odontosection	Risk of adjacent tooth damage
Root morphology	Influences extraction strategy	Root fracture
Proximity to inferior alveolar nerve	Indication for coronectomy	Nerve injury or paresthesia

💬 Discussion
The selection of an appropriate surgical technique for third molar extraction is directly related to anatomical, radiographic, and patient-specific factors. Modern approaches, such as piezoelectric surgery and coronectomy, emphasize tissue preservation and risk reduction, particularly in cases involving neural proximity. However, these techniques require advanced training and careful case selection to ensure predictable outcomes.

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✍️ Conclusion
Surgical extraction of third molars is a procedure that demands precise diagnosis and technique selection. Understanding the definitions, advantages, and characteristics of each surgical approach allows clinicians to tailor treatment plans, minimize complications, and enhance postoperative recovery.

🎯 Clinical Recommendations
▪️ Perform thorough radiographic assessment before surgery
▪️ Select the least invasive technique that ensures complete tooth removal
▪️ Consider coronectomy when nerve injury risk is high
▪️ Provide adequate postoperative monitoring and follow-up

📚 References

✔ Renton, T., Hankins, M., Sproate, C., & McGurk, M. (2005). A randomised controlled clinical trial to compare the incidence of injury to the inferior alveolar nerve after coronectomy and removal of mandibular third molars. British Journal of Oral and Maxillofacial Surgery, 43(1), 7–12. https://doi.org/10.1016/j.bjoms.2004.09.002
✔ Peterson, L. J., Ellis, E., Hupp, J. R., & Tucker, M. R. (2014). Contemporary Oral and Maxillofacial Surgery (6th ed.). Elsevier Mosby.
✔ Monaco, G., De Santis, G., Gatto, M. R., & Corinaldesi, G. (2014). Coronectomy: A surgical option for impacted third molars in close proximity to the inferior alveolar nerve. Journal of the American Dental Association, 145(5), 463–469. https://doi.org/10.14219/jada.2014.13

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Pain Management in Pediatric Pulp Therapy: Best Anesthetics and Clinical Techniques

Pain control is a critical determinant of success in pediatric pulp therapy, directly influencing treatment outcomes, child cooperation, and future dental attitudes. Inadequate anesthesia may result in procedural discomfort, heightened anxiety, and long-term dental fear.

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Therefore, effective pain management in children undergoing pulp therapy requires a comprehensive understanding of anesthetic agents, injection techniques, and child-specific anatomical and psychological considerations. This article reviews the best anesthetics and evidence-based techniques currently recommended for pediatric pulp treatments.

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✅ Anesthetic Agents Commonly Used in Pediatric Dentistry

Lidocaine (2% with epinephrine 1:100,000)
Lidocaine remains the gold standard local anesthetic in pediatric dentistry due to its rapid onset, adequate depth of anesthesia, and well-documented safety profile.

Articaine (4% with epinephrine 1:100,000)
Articaine provides enhanced bone penetration, making it effective for infiltration anesthesia in mandibular primary molars. However, its use in young children must be carefully dosed.

Mepivacaine (3% plain)
Indicated when vasoconstrictors are contraindicated, mepivacaine offers moderate duration anesthesia but reduced hemostasis.

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✅ Anesthetic Techniques for Pulp Therapy in Children

Infiltration Anesthesia
Preferred for maxillary teeth and increasingly effective in mandibular primary molars due to thinner cortical bone.

Inferior Alveolar Nerve Block
Indicated for extensive mandibular pulp therapy but associated with higher failure rates and postoperative soft tissue trauma.

Supplemental Techniques
▪️ Intraligamentary anesthesia
▪️ Intrapulpal anesthesia (used only when other techniques fail)
These approaches enhance pain control during inflamed pulpal procedures.

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✅ Pain Modulation Strategies Beyond Anesthesia
Adjunctive methods such as behavior guidance techniques, topical anesthetics, slow injection rates, and age-appropriate communication significantly improve perceived pain control. The combination of pharmacological and psychological strategies is essential for optimal pediatric pain management.

💬 Discussion
Despite advances in anesthetic pharmacology, pain during pediatric pulp therapy remains a clinical challenge, particularly in teeth with irreversible pulp inflammation. Studies demonstrate that articaine infiltration may outperform traditional nerve blocks in primary mandibular molars, reducing discomfort and soft tissue injury. However, technique sensitivity, dosage accuracy, and patient behavior remain critical variables influencing anesthetic success.

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🎯 Recommendations
▪️ Select anesthetic agents based on patient age, medical history, and procedure type
▪️ Prefer infiltration techniques whenever clinically feasible
▪️ Use supplemental anesthesia when conventional methods are insufficient
▪️ Combine anesthesia with non-pharmacological behavior management

✍️ Conclusion
Effective pain management in pediatric pulp therapy relies on appropriate anesthetic selection, precise technique, and child-centered care. Evidence supports the use of modern local anesthetics and minimally invasive approaches to enhance comfort and cooperation. When applied correctly, these strategies improve clinical outcomes and foster positive long-term dental experiences in children.

📊 Comparative Table: Common Pulp Therapy Treatments in Pediatric Dentistry

Pulp Therapy Procedure	Clinical Indications	Key Considerations
Indirect pulp treatment	Deep caries without pulp exposure	Requires accurate caries removal and sealing
Direct pulp capping	Small mechanical or traumatic exposure	Limited indication in primary teeth
Pulpotomy	Vital pulp with coronal inflammation	Adequate anesthesia essential for success
Pulpectomy	Necrotic or irreversibly inflamed pulp	More complex and time-consuming procedure

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Guideline on pulp therapy for primary and immature permanent teeth. Pediatric Dentistry, 45(6), 343–351.
✔ Arrow, P. (2018). Pain management for pulp therapy in primary molar teeth. Australian Dental Journal, 63(2), 203–210. https://doi.org/10.1111/adj.12594
✔ Malamed, S. F. (2020). Handbook of local anesthesia (7th ed.). St. Louis, MO: Elsevier.
✔ Wright, G. Z., Kupietzky, A., & Martinez Mier, E. A. (2014). Behavior management in dentistry for children (2nd ed.). Ames, IA: Wiley-Blackwell.

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Pharmacological Behavior Management in Pediatric Dentistry: Drugs, Dosage, and Clinical Safety

Behavior management is a cornerstone of pediatric dentistry, particularly when non-pharmacological techniques fail to achieve adequate cooperation. Pharmacological behavior management in pediatric dentistry aims to reduce anxiety, fear, and disruptive behavior while ensuring patient safety and treatment efficacy.

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This approach is especially indicated in children with severe dental anxiety, odontophobia, extensive treatment needs, or special health care requirements. The present article reviews the most commonly used pharmacological agents, including commercial names, dosages, pre- and post-administration care, and current clinical recommendations based on scientific evidence.

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✅ Common Pharmacological Agents in Pediatric Dentistry

Midazolam
▪️ Drug class: Benzodiazepine
▪️ Commercial names: Versed®, Buccolam®
▪️ Dosage (oral): 0.3–0.5 mg/kg (maximum 10 mg)
▪️ Dosage (intranasal): 0.2–0.3 mg/kg
Midazolam provides anxiolysis, sedation, and anterograde amnesia, making it one of the most widely used agents for conscious sedation in children.

Nitrous Oxide–Oxygen Sedation
▪️ Commercial systems: Porter®, Matrx®
▪️ Concentration: 30–50% nitrous oxide, titrated individually
Nitrous oxide offers minimal sedation with rapid onset and recovery, preserving protective reflexes and allowing communication with the patient.

Hydroxyzine
▪️ Drug class: Antihistamine with sedative properties
▪️ Commercial names: Atarax®, Vistaril®
▪️ Dosage: 0.6–1 mg/kg, administered orally
Hydroxyzine is frequently used as an adjunct sedative, especially in mildly anxious pediatric patients.

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✅ Mechanism of Action
Pharmacological agents used in behavior management act primarily by modulating the central nervous system, reducing anxiety and motor activity. Benzodiazepines enhance GABAergic inhibition, while nitrous oxide exerts anxiolytic effects through NMDA receptor modulation and endogenous opioid release.

✅ Pre-Administration Care

▪️ Comprehensive medical and dental history evaluation
▪️ Assessment of ASA physical status
▪️ Strict adherence to fasting (NPO) guidelines
▪️ Informed consent from parents or legal guardians
▪️ Baseline recording of vital signs

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✅ Post-Administration Care

▪️ Continuous monitoring until full recovery of consciousness
▪️ Discharge only after meeting standard recovery criteria
▪️ Clear written and verbal post-sedation instructions
▪️ Avoid physical activity for 24 hours when oral sedatives are used

💬 Discussion
While pharmacological behavior management can significantly improve treatment outcomes, it requires proper training, patient selection, and emergency preparedness. The indiscriminate use of sedatives may increase the risk of adverse events, particularly respiratory depression. Therefore, pharmacological techniques must be integrated within a comprehensive behavior management framework, emphasizing safety and ethical responsibility.

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🎯 Recommendations
▪️ Reserve pharmacological methods for clearly indicated cases
▪️ Use the lowest effective dose
▪️ Ensure availability of emergency equipment and trained personnel
▪️ Combine pharmacological and non-pharmacological behavior guidance techniques

✍️ Conclusion
Pharmacological management of behavior in pediatric dentistry is a valuable clinical tool when used judiciously. Evidence supports its effectiveness in reducing anxiety and improving cooperation, provided that strict protocols, accurate dosing, and vigilant monitoring are followed. When integrated responsibly, pharmacological behavior management enhances both patient experience and clinical success.

📊 Comparative Table: Clinical Characteristics of Odontophobia

Clinical Aspect	Behavioral Manifestations	Clinical Impact
Intense dental fear	Crying, avoidance, panic reactions	Delayed or avoided dental treatment
Physiological response	Increased heart rate, sweating, nausea	Difficulty performing routine procedures
Negative past experiences	Anticipatory anxiety before appointments	Reduced cooperation during treatment
Cognitive distress	Catastrophic thoughts about pain	Need for advanced behavior management

📚 References

✔ American Academy of Pediatric Dentistry. (2023). Guideline on behavior guidance for the pediatric dental patient. Pediatric Dentistry, 45(6), 292–310.
✔ Coté, C. J., Wilson, S., & American Academy of Pediatrics. (2019). Guidelines for monitoring and management of pediatric patients before, during, and after sedation. Pediatrics, 143(6), e20191000. https://doi.org/10.1542/peds.2019-1000
✔ Wilson, S. (2016). Pharmacologic behavior management for pediatric dental treatment. Pediatric Clinics of North America, 63(5), 965–981. https://doi.org/10.1016/j.pcl.2016.06.009
✔ Malamed, S. F. (2020). Sedation: A guide to patient management (6th ed.). St. Louis, MO: Elsevier.

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CTZ vs. Guedes-Pinto Paste in Necrotic Teeth: Which Endodontic Material Performs Better?

The management of necrotic teeth, particularly in pediatric and mixed dentition, remains a clinical challenge due to the presence of polymicrobial infection, periapical inflammation, and complex root canal anatomy. Intracanal medicaments and obturation pastes play a critical role in controlling infection and promoting periapical healing.

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Among the materials most frequently discussed in Latin American pediatric dentistry are CTZ paste and Guedes-Pinto paste, both widely used as alternatives to conventional endodontic protocols. This article provides an evidence-based comparison of their composition, mechanisms of action, clinical performance, and limitations in the treatment of necrotic teeth.

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✅ Composition of CTZ Paste
CTZ paste is composed of:

▪️ Chloramphenicol
▪️ Tetracycline
▪️ Zinc oxide–eugenol
This combination offers broad-spectrum antimicrobial activity, targeting aerobic and anaerobic bacteria commonly associated with endodontic necrosis. Zinc oxide–eugenol serves as a vehicle and obturation medium, providing sealing ability and mild anti-inflammatory effects.

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✅ Composition of Guedes-Pinto Paste
Guedes-Pinto paste consists of:

▪️ Rifampicin
▪️ Prednisolone
▪️ Camphorated paramonochlorophenol (CMCP)
This formulation combines antimicrobial, anti-inflammatory, and analgesic properties, making it particularly suitable for infected primary teeth. The corticosteroid component helps reduce periapical inflammation, while CMCP enhances antibacterial efficacy.

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✅ Mechanisms of Action

CTZ Paste
▪️ Inhibits bacterial protein synthesis via tetracycline and chloramphenicol
▪️ Provides chemical disinfection without mechanical instrumentation
▪️ Acts as a long-term antimicrobial obturating material

Guedes-Pinto Paste
▪️ Disrupts bacterial cell metabolism through rifampicin and CMCP
▪️ Reduces inflammatory response via prednisolone
▪️ Promotes symptom relief and periapical tissue recovery

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✅ Clinical Performance in Necrotic Teeth
Clinical studies indicate that both materials demonstrate high success rates in necrotic primary teeth when properly indicated. CTZ paste is often associated with simplified single-visit protocols, while Guedes-Pinto paste shows favorable outcomes in cases with acute inflammation and pain. However, neither material should be considered a substitute for adequate diagnosis and case selection.

💬 Discussion
The choice between CTZ and Guedes-Pinto paste should be guided by clinical presentation, patient age, systemic considerations, and operator experience. CTZ paste offers prolonged antimicrobial action but raises concerns regarding antibiotic resistance and tooth discoloration. Guedes-Pinto paste provides strong anti-inflammatory effects but may present higher cytotoxic potential due to CMCP. Current evidence supports their use mainly in primary teeth, with limited indication in permanent dentition.

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🎯 Recommendations
▪️ Use CTZ paste in necrotic primary teeth requiring simplified endodontic protocols
▪️ Consider Guedes-Pinto paste in cases with acute inflammation or symptomatic necrosis
▪️ Avoid indiscriminate use due to antibiotic stewardship concerns
▪️ Always perform radiographic and clinical follow-up

✍️ Conclusion
Both CTZ and Guedes-Pinto pastes are effective materials for managing necrotic teeth, particularly in pediatric dentistry. Their success depends on appropriate case selection, understanding of their pharmacological properties, and adherence to evidence-based protocols. Neither material replaces conventional endodontic principles, but both remain valuable tools when used judiciously.

📊 Comparative Table: Clinical Characteristics of a Necrotic Tooth

Clinical Feature	Diagnostic Indicators	Clinical Implications
Loss of pulp vitality	Negative thermal and electric pulp tests	Indicates irreversible pulp damage
Periapical radiolucency	Radiographic evidence of bone loss	Suggests chronic periapical infection
Tooth discoloration	Gray or dark crown appearance	Common in long-standing necrosis
Possible fistula or abscess	Clinical drainage or swelling	Requires immediate infection control

📚 References

✔ Guedes-Pinto, A. C., Paiva, J. G., & Bozzola, J. R. (1981). Endodontic treatment of primary teeth with a paste containing antibiotics and corticosteroids. Journal of Dentistry for Children, 48(2), 144–147.
✔ Rifkin, A. (1980). A simple, effective endodontic technique for primary teeth. Journal of Dentistry for Children, 47(6), 435–441.
✔ Santos, P. S., & de Araujo, F. B. (2009). Antimicrobial activity of CTZ paste in primary teeth. International Journal of Paediatric Dentistry, 19(6), 397–401. https://doi.org/10.1111/j.1365-263X.2009.01007.x
✔ Leonardo, M. R., & Silva, L. A. B. (2008). Endodontia: Tratamento de canais radiculares. São Paulo: Artes Médicas.

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