Pulp capping in primary teeth is a conservative procedure aimed at preserving pulp vitality following an accidental or intentional pulp exposure during caries removal.
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✅ Main Medications Used
1. Calcium Hydroxide (Ca(OH)₂)
➤ Composition: Pure calcium hydroxide or formulated with hardening agents (e.g., Dycal®).
➤ Indications: Small pulp exposures without prolonged bleeding, in vital primary teeth.
➤ Advantages:
° Stimulates reparative dentin formation.
° Antibacterial properties.
° Easy to handle.
➤ Disadvantages:
° Soluble in oral fluids.
° Poor sealing ability.
° Fragile under mechanical stress.
➤ Handling: Apply a thin layer over the exposure, followed by a protective material such as resin-modified glass ionomer (RMGI).
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➤ Composition: Calcium, silicate, and aluminum oxides. Commercial examples: ProRoot® MTA, MTA Angelus®.
➤ Indications: Direct pulp capping in vital pulps, small pulp perforations.
➤ Advantages:
° High biocompatibility.
° Excellent sealing ability.
° Stimulates dentin bridge formation.
➤ Disadvantages:
° High cost.
° Long setting time (~2–4 hours).
° Difficult to manipulate.
➤ Handling: Mix with sterile distilled water and apply over the pulp; allow complete setting before final restoration.
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➤ Composition: Calcium oxide, tricalcium silicate, zirconium oxide (radiopacifier).
➤ Indications: Modern alternative to MTA for direct pulp capping.
➤ Advantages:
° Faster setting time (~12 minutes).
° Biocompatible.
° Better mechanical properties than MTA.
➤ Disadvantages:
° High cost.
° May require training for proper handling.
➤ Handling: Applied directly to the exposure with a spatula, no intermediate layer needed.
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➤ Composition: Zinc oxide mixed with eugenol.
➤ Indications: Indirect pulp capping only (not for direct use) due to cytotoxicity risks.
➤ Advantages:
° Sedative effect on pulp tissue.
° Easy handling.
Disadvantages:
° Cytotoxic if in direct contact with the pulp.
° Inhibits polymerization of resin composites.
➤ Handling: Used as a base in deep cavities with no pulp exposure.
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➤ Composition: Polyalkenoic acid, fluoroaluminosilicate glass, hydrophilic resin (HEMA).
➤ Indications: Intermediate layer over medications like Ca(OH)₂ or MTA.
➤ Advantages:
° Excellent adhesion to dentin.
° Fluoride release.
° Good mechanical resistance.
➤ Disadvantages:
° Should not be used alone in direct contact with pulp.
➤ Handling: Apply with microbrush or spatula, light-cure, and proceed with final restoration.
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Choosing the appropriate medication for pulp capping in primary teeth should consider factors such as exposure size, pulp vitality, the material's ability to stimulate dentinogenesis, handling properties, and cost. While calcium hydroxide remains widely used, materials like MTA and Biodentine offer significant advantages in sealing ability and biocompatibility. Using an additional protective layer, such as RMGI, improves treatment longevity and reduces microleakage risk. Continuous education in modern biomaterials is essential for achieving predictable and successful outcomes in pediatric dentistry.
📚 References
✔ 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
✔ Fuks, A. B. (2008). Vital pulp therapy with new materials for primary teeth: New directions and treatment perspectives. Journal of Endodontics, 34(7 Suppl), S18–S24. https://doi.org/10.1016/j.joen.2008.02.028
✔ Murray, P. E., García-Godoy, F., & Hargreaves, K. M. (2007). Regenerative endodontics: A review of current status and a call for action. Journal of Endodontics, 33(4), 377–390. https://doi.org/10.1016/j.joen.2006.09.013
✔ Nowicka, A., Lipski, M., Parafiniuk, M., Sporniak-Tutak, K., Lichota, D., Kosierkiewicz, A., … & Buczkowska-Radlińska, J. (2013). Response of human dental pulp capped with biodentine and mineral trioxide aggregate. Journal of Endodontics, 39(6), 743–747. https://doi.org/10.1016/j.joen.2013.01.005
✔ Rodd, H. D., Waterhouse, P. J., Fuks, A. B., Fayle, S. A., & Moffat, M. A. (2006). Pulp therapy for primary molars. International Journal of Paediatric Dentistry, 16(s1), 15–23. https://doi.org/10.1111/j.1365-263X.2006.00774.x
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