纤维加强树脂夹板固定下颌前牙应力分布的有限元分析  

Finite element analysis of stress distribution of mandibular anterior teeth fixed by fibre strengthened composite resin splint

作　　者：郑立娟 马卫东 陈秉智[2] 

机构地区：[1]大连市口腔医院,116021 [2]大连交通大学交通运输工程学院

出　　处：《实用口腔医学杂志》2012年第6期691-694,共4页Journal of Practical Stomatology

摘　　要：目的:探讨不同牙周状况下,纤维加强复合树脂夹板固定前后的应力分布;为临床牙周夹板应用提供理论参考。方法:采用CT技术、计算机图像处理系统及有限元软件建模,研究不同牙周支持组织的下前牙纤维加强复合树脂夹板固定前后应力的分布。结果:下前牙的von Mises应力的最大值,随着牙槽骨吸收程度的增加,逐渐增大,中切牙和侧切牙的变化明显,尖牙平缓。但当牙槽骨吸收达根长的1/2或以上时,根尖的应力值急剧增大;戴用牙周夹板后,中切牙和侧切牙的应力值均减小,而尖牙的应力值增加。结论:牙槽吸收达根长的1/2或以上时,牙周组织缓冲能力降低,应采取牙周夹板固定,纤维加强复合树脂夹板能有效分散力至有富余潜能的牙齿上。Objective： To analyze the stress distribution of mandibular anterior teeth fixed by fibre strengthened composite resin splint. Methods：The mandibule with normal teeth of a healthy male volunteer was scanned by CT, the image was transfered into DI- COM file and then put into Mimics finite element software, the stress distribution of the anterior teeth with various alveolar bone absorp- tion was analysed before and after application of the fibre strengthened composite resin splint. Results： The max yon Mises stress of lower anterior teeth increased as the the alveolar bone absorption increased, meanwhile the strength on central and lateral incisors changed obviously and related to the canine teeth. But when the alveolar bone absorbed by 50% or more of the root length, the stress value of the apical increased significantly. Application of the fibre strengthened composite resin splint reduced the stress on the anterior teeth, and increased the stress on canine. Conclusion： Fiber composite resin periodontal splint can effectively spread the occlusal force to related teeth.

关 键 词：牙周病 有限元 牙周夹板 

分 类 号：R781.4[医药卫生—口腔医学]