Evaluation of Remaining Dentin Thickness After Manual and Evaluation of Remaining Dentin Thickness After Manual and Rotary Instrumentation In Primary Molars Using Cone Beam Rotary Instrumentation In Primary Molars Using Cone Beam Computed Tomography. (An In-Vitro Study)

Abstract

Aim: To compare the radicular dentin thickness before and after instrumentation by manual stainless-steel (K-files) versus rotary files (AF™ Baby File) at coronal, middle, and apical thirds using Cone Beam Computed Tomography (CBCT). Materials and Methods: Forty roots of extracted mandibular primary molars were collected, and randomly and equally divided into 2 groups. Manual Group was prepared by K-files, and Rotary Group was prepared by rotary AF™ Baby File system. Samples were decapitated and stabilized in epoxy resin blocks. Samples were subjected to CBCT scan before and after instrumentation for radicular dentin thickness evaluation at 3 measuring points; apical, middle, and coronal. Results: An average amount of dentin removed was found to be significantly higher in Manual Group compared to Rotary Group in the 3 measuring points (P <0.005). Conclusion: Rotary files can be considered more preferable than manual files in terms of preservation of radicular dentin thickness after root canal instrumentation, therefore rotary files can be a suitable substitute for conventional SS manual files