Three-dimensional Finite Element Modeling of a Maxillary two-rooted Premolar-Stress Analysis with or without Modeling of the Periodontium

Weng-Pin Chen ； Bor-Shiunn Lee ； Chun-Pin Lin

《Journal of Dental Sciences》 24卷1期 (2005/03) Pp. 35-44

https://doi.org/10.30086/JDS.200503.0005

並列摘要

The purpose of this research was to investigate the stress distributions of 2 viable 3-dimensional (3D) finite element models of a 2-rooted maxillary first premolar tooth, with (complete model) and without (simplified model) inclusion of the periodontal ligament (PDL). A freshly extracted maxillary first premolar tooth was embedded and sectioned into 22 slices. The cross-sectional images were processed and used to reconstruct a 3D model. Five loading locations (1B, 2B, 3B, 1L, and 2L) on the buccal (B) and lingual (L) cusps were chosen. For each location, a force of 44 N of occlusal load at 45° with respect to the horizontal line was applied. The results showed that regardless of whether the periodontium was modeled or not, the strain values on the lingual and buccal heights of the contour were similar. However, significant strain differences along the buccal and lingual sides of the root were found between the simplified and complete models. A peak strain value existed near the coronal 1/3 of the buccal and lingual sides of the root in the complete model when the lingual cusp was subjected to an occlusal load. From the results of this study, the periodontal ligament needs to be included in the finite element model and experimental design regarding the force distribution of the tooth and its surrounding tissues.

並列關鍵字

finite element analysis ； premolar tooth ； strain analysis ； periodontal ligament ； contact body