内置自动弹力牵引成骨装置的设计应用  

Design and Application of Internal Devices for Automatic Elasticity Distraction Osteogenesis

作　　者：周宏志 胡敏[2] 胡开进 姚军[2] 刘洪臣[2] 

机构地区：[1]第四军医大学口腔医院口腔颌面外科,陕西西安710032 [2]解放军总医院口腔科,北京100853

出　　处：《华西口腔医学杂志》2005年第5期370-372,共3页West China Journal of Stomatology

基　　金：国家自然科学基金资助项目(30171017);北京市自然科学基金资助项目(7042058)

摘　　要：目的完善记忆合金弹力牵引器的辅助固定导引装置设计,初步探索其应用的可行性。方法利用正弦波形记忆合金弹力牵引器、医用重建钛板、小型钛板配合构成内置式自动弹力牵引装置,构建牵引成骨重建下颌骨颏部约6 cm节段缺失的杂种犬动物模型,观察新型装置的应用效果。结果实验设计装置可基本按照预想方式自动完成骨牵引,手术后2个月内即可形成节段再生骨,可延长截短的双侧下颌骨。结论内置自动弹力牵引装置显示了实际应用的可行性和优越性,但在牵引力控制等方面还需要深入研究。Objective To improve the design of the devices used for automatic elasticity distraction osteogenesis, and to preliminarily testify their feasibility for clinical application. Methods The internal automatic distraction devices were constructed by three parts, including sinusoid shape memory alloy distractor, reconstructive plate and mini-plate. The animal model of trifocal bone transport reconstruction of canine mandibular mentis was duplicated, in which a 6 cm mandibular mentis segment was removed and the transport disc was created by osteotomy in both ends of the mandibular defect. The plates were used for internal fixation and shape reconstruction of the mandible, They also served as transport distraction guidance for the elasticity distraetor. Results The new devices could complete bone transport as expected. Regenerated bone segments were formed in two months and both sides of the mandibular body were lengthened. Because 0~ the narrow angle and obstruction from the thick soft tissues in the mentls area, the ultimate symphysis mentalis was not reconstructed. Conclusion The design of the internal elasticity distraction devices showed potential feasibility for clinical practice. But further studies are stiff needed for better control of the strength and balance of distraction forces.

关 键 词：牵引成骨 下颌骨 骨重建 内置固定器 

分 类 号：R782[医药卫生—口腔医学]