减阻牵张远移上颌尖牙的三维有限元分析

发布时间：2018-02-14 07:46

本文关键词： 牵张成骨三维有限元法错颌畸形牙齿移动　出处：《安徽医科大学学报》2014年08期 　论文类型：期刊论文

【摘要】：目的模拟不同术式远移上颌尖牙,分别建立其三维有限元模型,分析尖牙和牙周组织的生物力学状况。方法分别建立常规状态下移动尖牙(模型1)、牙周膜减阻牵张成骨术移动尖牙(模型2)、牙槽骨减阻牵张成骨术移动尖牙(模型3)的三维有限元模型,在颊腭双侧力的加载后观察牙及周围组织应力分布和位移情况。结果尖牙最大瞬时位移值模型2模型3模型1,最大等效应力值模型2模型1模型3,最大主应力模型1模型2模型3,最大剪切应力模型2模型1模型3。结论 "牙周膜减阻牵张成骨"和"牙槽骨减阻牵张成骨"可有效减小牙移动阻力,加大尖牙瞬时位移,且去除尖牙远中骨质效果较去除颊侧骨皮质更为显著。两种方法均成功避免了支抗丧失,但尖牙存在远中倾斜趋势,在临床工作中应加以控制。
[Abstract]:Objective to simulate the distally displaced maxillary canine teeth with different surgical methods and to establish three dimensional finite element models respectively. The biomechanical status of canine and periodontal tissue was analyzed. Methods the canine movement (model 1), periodontal ligament reduction distraction osteogenesis (model 2), alveolar bone reduction and distraction osteogenesis (model 2) were established respectively. Type 3), Results the stress distribution and displacement of teeth and surrounding tissues were observed after the loading of buccal and palatal forces. Results Model 2 of maximum instantaneous displacement of canine, model 3 of model 3, model 2 of maximum equal effect force, model 1 of model 3 and model 3 of maximum principal stress. Model 2, model 2, model 2, model 1, model 3. Conclusion "periodontal ligament drag reduction distraction osteogenesis" and "alveolar bone drag reduction distraction osteogenesis" can effectively reduce tooth movement resistance. The effect of removing distal canine bone is more significant than that of buccal bone cortex. Both methods have successfully avoided the loss of Anchorage, but there is a tendency of distal tilt in canine teeth, which should be controlled in clinical work.
【作者单位】：上海市虹口区牙病防治所口腔修复科;四川大学华西口腔医学院正畸科;新疆医科大学附属第一医院口腔正畸科;
【基金】：新疆维吾尔自治区自然科学基金青年基金(编号:2011211B35)
【分类号】：R783.5

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