手术先行方案中术后牙齿加速移动的初步研究

发布时间：2019-04-08 16:05

【摘要】：目的:手术先行方案治疗牙颌面畸形是目前的研究热点。在采用手术先行方案的治疗中,发现正颌手术后3-4个月牙齿加速移动,提出了正颌手术致颌面部损伤加快牙齿移动的观点。本文通过实验分析手术先行方案中术后牙齿快速移动的原因。材料与方法:12只成年新西兰大白兔,分为AB两组,每组6只,A组为实验组,B组为对照组,A以兔左下颌骨建立手术先行方案模型,术后以75 gf为初始力移动左下颌第一前臼齿向前。B组仅用75 gf初始力移动左下颌第一前臼齿向前。结果:A组中左下颌第一前臼齿移动距离平均为0.96 mm,B组为0.91 mm,两组间无明显差异,p=0.36。结论:实验中对下颌骨的损伤并不明显引起术后下颌牙齿快速移动,局部因素包括咬合功能减弱、牙颌面关系改善致生物力改变等的影响在采用手术先行方案时的不可忽视。
[Abstract]:Objective: surgical treatment of maxillofacial deformities is a hot topic at present. In the treatment of maxillofacial injury caused by orthognathic surgery, the accelerated tooth movement was found at 3 months and 4 months after orthognathic surgery, and the viewpoint was put forward that the maxillofacial injury caused by orthognathic surgery could accelerate tooth movement. In this paper, the causes of rapid tooth movement during and after operation were analyzed experimentally. Materials and methods: twelve adult New Zealand white rabbits were divided into two groups: AB group (n = 6), A group (n = 6), B group (n = 6) and control group (n = 6). The first premolar of the left mandible was moved forward with 75 gf as the initial force, and only the first premolar of the left mandible was moved forward with the initial force of 75 gf in group B. Results: in group A, the mean distance of movement of left mandibular first premolars was 0.96 mm,B and 0.91 mm, but there was no significant difference between the two groups (p = 0.36). Conclusion: the mandibular injury in the experiment did not cause the rapid movement of the mandibular teeth after operation. The local factors including the weakening of the occlusal function and the change of the biological power caused by the improvement of the relationship between the teeth and the maxillofacial surface should not be ignored when the operation was carried out.
【作者单位】：重庆市口腔疾病与生物医学研究中心;重庆医科大学附属口腔医院;重庆医科大学附属口腔医院颌面外科;
【分类号】：R782.2

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