华西口腔医学杂志

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下颌骨骨折骨断端生物力学特性的三维模型研究

刘春丽1, 吴安平1, 朴正国1, 吴宏2, 彭铁男1, 刘磊2   

  1. 1.吉林大学口腔医院口腔颌面外科, 吉林长春130000; 2.吉林大学机械科学与工程学院, 吉林长春130022
  • 收稿日期:2007-08-25 修回日期:2007-08-25 出版日期:2007-08-20 发布日期:2007-08-20
  • 通讯作者: 刘春丽,Tel:13596043595
  • 作者简介:刘春丽(1955-),女,吉林人,教授,学士
  • 基金资助:

    长春市科技发展计划基金资助项目(20029)

Study of three- dimensional model on biomechanical character istics of mandibular fr actures in different site

LIU Chun- li1, WU An- ping1, PIAO Zheng- guo1, WU Hong2, PENG Tie- nan1, LIU Lei2   

  1. 1. Dept. of Oral and Maxillofacial Surgery, College of Stomatology, Jilin University, Changchun 130000, China; 2. College of Mechanical Engineering, Jilin University, Changchun 130022, China
  • Received:2007-08-25 Revised:2007-08-25 Online:2007-08-20 Published:2007-08-20
  • Contact: LIU Chun- li,Tel:13596043595

摘要:

目的研究下颌骨不同部位骨折断端的生物力学特性,指导临床术后患者进行合理的功能性咀嚼运动。方法精确测量9个成年男性下颌骨标本,建立下颌骨三维力学研究模型。分别计算在下颌牙列不同咬合点功能负载时下颌角、下颌体颏孔区及下颌正中联合区3个骨折好发部位骨折断端截面上的弯矩、扭矩及剪应力。应用Origin 6.0数据处理软件分析。结果下颌角区骨折断端截面上具有相对较高的正弯矩及剪应力;下颌体颏孔区骨折骨断端截面上正负弯矩作用较大,而且骨折侧下颌骨后牙咬合时扭矩最大;正中联合骨折时,整个牙列不同部位负载骨折截面上均只形成负弯矩,扭矩和剪应力作用较小。结论在功能负载条件下,下颌角、下颌体颏孔区及下颌正中联合等骨折断端截面上呈现出各自的生物力学特性,这些力学特性对于临床上治疗不同部位下颌骨骨折和对患者术后正确的咬合指导具有十分重要的意义。

关键词: 下颌骨骨折, 生物力学, 三维模型

Abstract:

Objective To determine the biomechanical characteristics of mandibular fractures in different site. Methods Nine adult mandibular specimens were measured precisely. The data was used to establish a three - dimensional model. When mandibular was under functional loading, the bending and torsion moment as well as shear force of angle, body and symphyseal fracture was calculated. The data were analyzed by Origin 6.0 software. Results Angle fracture had relatively high positive bending moment and high shear force. Body fracture had positive as well as negative bending moment and the highest torsion moments. Symphyseal fracture had only negative bending moment and relatively low shear force. Conclusion Angle, body and symphyseal fractures each have a biomechanics characteristic. These biomechanics characteristic should have an important meaning in the treatment of mandibular fractures and instructing patient how to bite correctly.

Key words: mandibular fractures, biomechanics, three- dimensional model