三维重建分析安氏Ⅱ类亚类偏颌矫治前后颞下颌关节及下颌骨形态的改变

发布时间：2018-11-05 15:31

【摘要】：目的通过锥形束CT(cone-beam computerized tomography,CBCT)分析安氏Ⅱ类亚类偏颌畸形患者正畸治疗前后颞下颌关节及下颌骨的形态特征。方法对60例生长发育高峰期及高峰期后的安氏Ⅱ类亚类偏颌畸形患者正畸治疗前后使用CBCT采集颅面Dicom数据,使用Mimics 15.0对骨组织进行三维重建,并建立三维坐标系。选择描述下颌骨、髁突及关节窝的11对测量项目进行统计分析。结果生长发育高峰期的安氏Ⅱ类亚类偏颌畸形患者正畸治疗前后中性侧与远中侧的下颌骨、髁突及关节窝形态无明显差异;生长发育高峰期后的患者治疗前中性侧的下颌支长度、髁突全高及关节窝前部宽度明显大于远中侧(P0.05),而治疗后只有中性侧的关节窝前部宽度大于远中侧(P=0.023)。结论安氏Ⅱ类亚类偏颌畸形是有功能性下颌偏斜向骨性偏斜发展,而在生长发育高峰期对其进行治疗,有利于减少后期的骨性畸形。
[Abstract]:Objective to analyze the morphological characteristics of temporomandibular joint (TMJ) and mandibular bone (TMJ) before and after orthodontic treatment in patients with class II orthognathic malformation by conical beam CT (cone-beam computerized tomography,CBCT). Methods CBCT was used to collect craniofacial Dicom data before and after orthodontic treatment in 60 patients with orthodontic malformation. Bone tissue was reconstructed with Mimics 15.0, and three-dimensional coordinate system was established. 11 items were selected to describe mandible, condyle and articular fossa. Results there was no significant difference in the morphology of mandible, condyle and articular fossa between neutral side and distal side before and after orthodontic treatment. The length of mandibular branch, the height of condylar process and the width of anterior part of articular fossa were significantly larger than those of distal side before treatment (P0.05), but only the width of anterior part of articular fossa of neutral side was larger than that of distal side after treatment (P0. 023). Conclusion Class II malformation is a kind of functional mandibular oblique development, and treatment at the peak of growth and development is beneficial to reduce the later period of bone deformities.
【作者单位】：重庆医科大学附属口腔医院:正畸科口腔疾病与生物医学重庆市重点实验室重庆市高校市级口腔生物医学工程重点实验室;
【基金】：重庆市卫生局医学科研面上项目(2012-1-055,2012-2-128)~~
【分类号】：R783.5

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