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[1]曲爱丽,丁晓梅,黑玉娜,等.髁突矢状骨折单板与平行双板坚固内固定生物力学分析[J].宁夏医科大学学报,2014,(07):755-758,830.
 QU Aaili,DING Xiaomei,HEI Yuna,et al.Biomechanical Analysis on Fixation Sagittal Fracture of the Mandibular Condyle with Single Plate or Double Parallel Plates[J].Ningxia Medical University,2014,(07):755-758,830.
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《宁夏医科大学学报》[ISSN:1005-8486/CN:64-1029/R]

卷:
期数:
2014年07期
页码:
755-758,830
栏目:
论著
出版日期:
2014-07-30

文章信息/Info

Title:
Biomechanical Analysis on Fixation Sagittal Fracture of the Mandibular Condyle with Single Plate or Double Parallel Plates
作者:
曲爱丽1丁晓梅2黑玉娜2铁铃2景捷3
1.宁夏大学机械工程学院,银川 750021; 2.宁夏医科大学,银川 750004; 3.宁夏医科大学总医院,银川 750004
Author(s):
QU Aaili1DING Xiaomei2HEI Yuna2TIE Ling2JING Jie3
1.Mechanical Engineering School of Ningxia University, Yinchuan 750021; 2.Ningxia Medical University, Yinchuan 750004; 3.The General Hospital of Ningxia Medical University, Yinchuan 750004
关键词:
髁突矢状骨折坚固内固定三维有限元生物力学应力
Keywords:
sagittal fracture of the mandibular condyle rigid fixation finite element analysis biomechanics stress
分类号:
R318.01
DOI:
-
文献标志码:
A
摘要:
目的以生物力学角度对比单板与平行双板法治疗髁突矢状骨折(SagittalFractureoftheMandibularCondyle,SFMC)两种坚固内固定方式,为治疗SFMC提供依据。方法以三维有限元法(finiteelementanalysis,FEA)建立包含双侧髁突的下颌骨的有限元模型。设右侧髁突为骨折侧,用厚0.1mm的薄层模拟骨折裂隙,建立单板、平行双板坚固内固定三维有限元模型。计算不同接骨板固定方式固定后下颌骨整体的应力分布状况和骨折侧髁突表面的应力分布、骨折断端的位移、微型钛板的受力、应力遮挡的状况。结果(1)右侧髁突的最大等效应力为97.176MPa,最大总位移为0.342mm,最大总转角为0.031°。(2)单板固定方式中,钛板的髁突残端固定处受力达2297MPa;髁突总体位移为0.9123mm;髁突游离端下部最大应力达243MPa,最大位移与最大转角分别为0.8794mm与0.0375°。(3)平行双板固定方式中,髁突残端所受应力为525.475MPa;髁突产生总体位移为0.9022mm;髁突游离端最大等效应力4.425MPa,最大总位移0.8827mm,最大总转角0.0199°,接骨板最大等效应力为530.324MPa。结论(1)单板法中,接骨板所产生的应力遮挡作用会导致髁突游离端明显移位,从而造成错位愈合,增加髁突改建程度。(2)平行双板法中,接骨板及髁突所承受的应力与正常髁突所承受的应力相似,接骨板的应力遮挡作用致髁突游离端移位程度也明显减小,减少术后错位愈合,减少相关并发症的发生。
Abstract:
Objective To analyze the biomechanical stress distribution on fixation sagittal fracture of the mandibular condyle(SFMC)with single or double parallel plates, and to obtain a proper way from the two fixation methods for surgical treatment SFMC. Methods The finite element model of mandible and condyle was established. The right condyle was simulated as SFMC with 0.1mm space across the condyle lengthways. The fixation finite element models with single plate or double parallel plates were established. The biomechanical stresses on mandible and condyle were calculated with finite element analysis(FEA). There were stress distribution of condylar surface, displacement around fracture, stress on the plate and stress shielding. Results(1)Maximum equivalent stress, maximum total displacement and maximum total corner were 97.176MPa, 0.342mm and 0.031 degree respectively on right condyle.(2)Single plate: the stress on plate was 2297MPa; total condylar displacement was 0.9123mm, the maximum stress on fractured fragment of condyle was 243MPa, maximum displacement was 0.8794mm, maximum total corner was 0.0375 degree.(3)Double parallel plates: the stress on condyle was 525.475MPa, the total displacement of condyle was 0.9022mm, maximum equivalent stress on fractured fragment was 4.425MPa, maximum total displacement was 0.8827mm, maximum total corner was 0.0199 degree, and maximum equivalent stress on plate was 530.324MPa. Conclusions(1)The fractured fragment of condyle may shift from its fixation place under the action of stress shielding on the plate when single plate is used to fixation SFMC. And the same time, the stress shielding may lead to dislocation healing and deformation of condyle in SFMC.(2)The stress action on plate and condyle is similar with that in normal condyle when double parallel plates are used to fixation SFMC. The stress shielding is not easy to dislocation healing and condylar deformation because of proper stress.

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备注/Memo

备注/Memo:
收稿日期:2014-04-06 基金项目:宁夏科技攻关计划项目(2011年) 作者简介:曲爱丽,副教授,在读博士研究生。 通信作者:景捷,教授,主任医师,硕士研究生导师。E-mail:jjdreamer@163.com
更新日期/Last Update: 2014-07-20