髁突颈部骨折坚固内固定后骨折愈合进程中髁突表面应力分布  

Stress Distribution Analysis of the Surface of Condyle during Simulated Fracture Healing of the Neck of Condyle by Miniplate Osteosynthesis

作　　者：杨壮群[1] 虎小毅[1] 王正辉[2] 荔鹏[1] 屠军波[1] 凌伟[3] 

机构地区：[1]西安交通大学口腔医院口腔颌面整形外科,陕西西安710004 [2]洛阳市中心医院口腔科,河南洛阳471000 [3]西安交通大学建筑工程与力学学院,陕西西安710049

出　　处：《华西口腔医学杂志》2005年第6期485-488,共4页West China Journal of Stomatology

摘　　要：目的分析微型钛板内固定对髁突颈部骨折愈合进程中髁突表面生物力学环境的影响,从理论上探讨临床上髁突颈部骨折内固定术后继发颞下颌关节紊乱病的可能原因。方法采用三维有限元应力分析方法,分析模拟髁突颈部骨折微型钛板内固定后骨折愈合进程中髁突表面应力分布的变化。结果从骨折初期到骨折完全愈合,微型钛板的固定有助于恢复髁突局部的生物力学环境,但经过12周的固定仍然与正常值有一定的差别。结论钛板内固定至骨折完全愈合后对髁突表面应力分布的影响可能是临床上髁突颈部骨折内固定术后继发颞下颌关节紊乱病的原因。Objective To find the reasons why patients always have tempommandibular disorders （TMD） after condylar fracture by analyzing the stress distribution change of the condylar surface whose subcondylar fracture ware fixed by miniplate during the whole healing process. Methods Analyzing the stress distribution change of the condylar surface whose subcondylar fracture were fixed by miniplate during the whole healing process by thrce-dimension finite element method （3D FEM） .Results During the whole healing process of the fracture, the miniplate osteosynthesis was helpful to the biomechanics environment rehabilitation of the condylar local, but it still lind difference with normal after fixng 12 weeks long. Conclusion The difference of stress distribution of condylar surface that fractured and fixed by miniplate with normal may be part of the reason of TMD after the subcondylar fracture miniplate osteosynthesis.

关 键 词：三维有限元 骨折 内固定 髁突 

分 类 号：R782[医药卫生—口腔医学]