正颌外科手术后髁突轴变化对髁突形态的影响：通过三维表面重建确定
Effect of post-orthognathic surgery condylar axis changes on condylar morphology as determined by 3-dimensional surface reconstruction.
作者信息
An Soo-Bum, Park Soo-Byung, Kim Yong-Il, Son Woo-Sung
机构信息
a Postgraduate student, Department of Orthodontics, School of Dentistry, Pusan National University Dental Hospital, Yangsan, South Korea.
出版信息
Angle Orthod. 2014 Mar;84(2):316-21. doi: 10.2319/052113-387.1. Epub 2013 Aug 14.
Abstract
OBJECTIVE
To evaluate the effect of postoperative condylar axis changes on mandibular condylar remodeling by comparing the condylar head in three-dimensional (3D) surface reconstructions before and after surgery in skeletal Class III deformities (one-jaw [mandibular setback] or two-jaw surgery), and also to determine the relationship between condylar inward rotation and condylar surface remodeling after orthognathic surgery.
MATERIALS AND METHODS
A retrospective analysis was conducted of 30 patients with skeletal Class III deformities who had received orthognathic surgery. Group 1 underwent one-jaw surgery (10 men, five women, age 22.4 ± 3.3 years), and group 2 underwent two-jaw surgery (10 men, five women, age 22.3 ± 2.2 years). Sixty condyles were reconstructed and superimposed pre- and postoperatively to compare the changes of condylar surfaces. The relation between the condylar axis change and the surface change using the Pearson correlation were investigated from the 3D image software.
RESULTS
Condylar surface changes before and after the surgery were significant. The postoperative inward rotation of the condyles was correlated with the average absolute deviation of the condyles, regardless of the surgery type (one- or 2-jaw surgery; r = .70, P < .05).
CONCLUSION
After orthognathic surgery, condylar surface changes occurred, and condylar inward rotation was closely related to changes of condylar surface.
摘要
目的
通过比较骨骼Ⅲ类畸形（单颌[下颌后缩]或双颌手术）患者手术前后三维（3D）表面重建的髁突头部，评估术后髁突轴变化对下颌髁突重塑的影响，并确定正颌手术后髁突内旋与髁突表面重塑之间的关系。
材料与方法
对30例行正颌手术的骨骼Ⅲ类畸形患者进行回顾性分析。第1组接受单颌手术（10例男性，5例女性，年龄22.4±3.3岁），第2组接受双颌手术（10例男性，5例女性，年龄22.3±2.2岁）。对60个髁突进行术前和术后重建及叠加，以比较髁突表面的变化。利用3D图像软件通过Pearson相关性研究髁突轴变化与表面变化之间的关系。
结果
手术前后髁突表面变化显著。无论手术类型（单颌或双颌手术）如何，术后髁突的内旋与髁突的平均绝对偏差相关（r = 0.70，P < 0.05）。
结论
正颌手术后，髁突表面发生变化，髁突内旋与髁突表面变化密切相关。
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