[Stress analysis of post-reinforced maxillary anterior teeth]

This study used plane stress analysis to survey the stress distribution of maxillary anterior teeth reinforced with posts of various materials, and maxillary anterior teeth without posts. Two-dimensional finite element models of the maxillary central incisor were subjected to a simulated biting force of 200N applied under various occlusal contact conditions. The results of this study suggest that posts can transfer stress to the dentin and supporting alveolar bone, and that there is a more even stress distribution than in teeth without posts. Also, with post reinforcement the relative stress magnitudes and concentrations at the lingual surface of the post cervical area indicates that conservative enlargement of the root canal of the lingual surface is necessary. Finally, it seems that posts material with the same elastic modulous as the dentin may be the best choice.