A Comparative Evaluation of Microhardness and Chemical Structure of Radicular Dentin with Two Combinations of TAP and MTAP: An In Vitro Study

BACKGROUND: The success of regenerative endodontics depends on various factors and the most vital being the complete eradication of microorganisms in the dentinal tubules. This could lead to changes that leave the radicular dentin prone to fracture. AIM: The purpose of the present study is to investigate the effects of triple antibiotic paste (TAP) and modified triple antibiotic paste (MTAP) of different concentrations on the microhardness and chemical structure of radicular dentin. MATERIALS AND METHODS: Human root cylinders were instrumented and randomized into four treatment groups and an untreated control group. Two treatment groups received 1 g/mL TAP or MTAP, and the other two treatment groups received 1 mg/mL methylcellulose-based TAP or MTAP. Cylinders were stored at 100% relative humidity for 4 weeks. Each root cylinder was subjected to a microhardness test before and after treatment. Different sets of radicular dentin specimens were treated as mentioned previously, and were examined using attenuated total reflection Fourier transform infrared spectroscopy. RESULTS: Significant reductions in microhardness of treated groups was noticed when compared to untreated control roots at 1,000 and/or 500 µm from the pulp-dentin interface. CONCLUSION: The use of 1 mg/mL methylcellulose-based TAP and MTAP may minimize the reduction in microhardness of roots compared with the currently used 1 g/mL concentration of these antibiotics. HOW TO CITE THIS ARTICLE: Daneswari M, Reddy NV, Chris PA, et al. A Comparative Evaluation of Microhardness and Chemical Structure of Radicular Dentin with Two Combinations of TAP and MTAP: An In Vitro Study. Int J Clin Pediatr Dent 2022;15(S-2):S151-S157.