Comparison of the microstructure of crown and root dentin by a scanning electron microscopic study

摘要: Background/Purpose Detailed information of the dentin microstructure is essential in order to interpret data from investigations on adhesive materials. Most studies focused crown dentin, and few compared microstructures root dentin. The purpose was compare density diameter dentinal tubules thickness peritubular at crown, coronal middle root. Materials methods Ten caries-free human lower first molars were sectioned into four parts as chamber roof, wall, root, After being immersed 5.25% NaOCl solution for 30 minutes, surfaces examined under a scanning electron microscope. Data tubule density, diameter, inner, outer portions collected. Friedman's nonparametric related sample test Wilcoxon signed rank post hoc used analyses. Results Tubule densities inner significantly than that crown. Peritubular width roof higher those other areas tooth. Conclusion Our findings show proportion tubular area lower, there less To achieve good bonding resin it potentially beneficial focus improving quality hybrid layer rather tags.