Cone Beam Computed Tomography(CBCT) Analysis of Enamel-dentin Thickness of Clinical Crown in Permanent Second Molars

Objectives: The aim of this study is to simulate the dimensions of crown restoration under clinical situation whether the pulp chamber could be involved, and this study was designed to investigate on the morphology and thickness between pulp chamber and crown contour, on second molars under cone beam computed tomography (CBCT) examination.The aim of this study is to simulate the dimensions of crown restoration under clinical situation whether the pulp chamber could be involved, and this study was designed to investigate on the morphology and thickness between pulp chamber and crown contour, on second molars under cone beam computed tomography (CBCT) examination.
Methods: A total of 150 cone beam computed tomography were recruited and 257 mandibular molars were examined in this study. Twelve distances, which is the thickness of enamel and dentin of the permanent second molar mandibular, were measured in order to gain a better understanding of variation in tooth size.
Results: The thickness of the between pulp chamber and crown contour, which is 2.4~5.25 cm, the closest part of pulp chamber to crown contour is mesial lingual of pulp chamber to lingual surface of crown, the thickest part of the dentin and enamel thickness is the distal buccal part of pulp chamber to occlusal surface, shows no significant sex differences, but the age is related.
Conclusions: Based on those results, there are differences in the location of the thickness between the pulp chamber walls and out surface of the tooth. Age is related to thickness of the dentin and enamel. The increase of the dentin and enamel thickness was noted. Furthermore, external irritating stimuli have an effect on the pulp chamber dimensional changes