下颌中切牙不同根长残根及其牙周支持组织光弹模型的研制

Development of photoelastic model for mandibular central incisor with different residual root length and periodontal tissue

目的：制作下颌中切牙不同根长残根及其牙周支持组织的光弹模型.方法：根据相似性原理用不同材料制成C区1残根、牙周膜及牙槽骨的光弹模型.结果：制得的光弹模型呈淡黄色,透明,牙周膜厚度为0.22～0.25mm,模型各材料间弹性模量比为1.35∶1∶0.00030.结论：该模型可用于对桩核烤瓷冠修复残根后牙周支持组织应力分布进行定性分析.

AIM： To manufacture the photoelastic model for mandibular central incisor with different residual root length and periodontal tissue. METHODS： According to the principles of similarity, different materials were used to manufacture the photoelastic model that included the residual root, alveolar bone and periodontal membrane of the first tooth in the C zone. RESULTS： The photoelastic model was pallide-flavens and transparent. The thickness of periodontal membrane was 0.22 - 0.25 mm. The proportion of elastic modulus of different materials in the model was 1.35 ： 1 ： 0. 00030. CONCLUSION ： The photoelastic model can be applied in qualitative analysis of the stress distribution in the periodontal supporting tissues of residual roots restored with post-and-crown.