成人骨性Ⅲ类错牙合与正常牙合髁突-关节窝位置对照性研究(1)
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2011年4月1日
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【摘要】目的 探讨成人安氏骨性类错颞下颌关节结构特征，并对髁突形态、髁突-关节窝关系进行评价。方法 应用三维CT重建技术骨性Ⅲ类错 患者和正常成人双侧颞下颌关节进行扫描，应用Mimics10.01软件进行重建，对上间隙、前间隙、后间隙指标进行测量分析，结果采用paired t-test检验。结果 骨性Ⅲ类错关节前间隙小于正常组，且有统计学意义(p<0.01)。骨性Ⅲ类错髁状突有39.4%为中性位，60.6%为前位； 结论 骨性Ⅲ类错的关节间隙变异较大，其前间隙比正常的要小；髁状突在关节窝的位置多为前位，少数为中性位。
【关键词】颞下颌关节 安氏骨性III类错正常 三维重建
中图分类号：R781 文献标识码：B 文章编号：1005-0515(2011)4-037-03
The comparision study on fossa condyle in adult patients with skeletal III class malocclusion and normal occlusion
Wang Xue-xia Liu Dong-xu
(The school of Stomatology， Shan-dong university Jinan 250012 China)
【Abstract】Objective The aim of our study was to assess condylar parameters and condyle position within glenoid fossa of TMJ in patients with Class III malocclusions on volumetric 3D imaging. Methods The study group included 33 patients with skeletal Class III malocclusion and 33 helthy volunteers with normal occlusion as the controls. pictures were reconstructed in three -dimensional (3D) using Mimics10.01 software .The images obtained from the sagittal slices were used to quantify following parameters: superior space，anterior space and posterior joint space； Differences of the mean values were tested using paired t-test.Results There were statistically significant differences (p<0.01) between two study groups for AS on both sides.In the Class III sample, there was no statistically significant difference between sides, however 60.6% anterior positioning and39.4% concentric positioning of the condyles was observed .Conclusion There was a smaller mean for anterior articular space in the Class III sample， most condyles were anterior positioning and others were concentric positioning.
【Key words】temporomandibular joint skeletal ClassIII malocclusion normal occlusion three-dimensionre constraction
颞下颌关节(TMJ)不同于全身其它关节，与也有着密切的关系，加于其上的负载将会影响其形态和功能[1]。
大量研究已发现错牙畸形与TMJ形态有相关性[2]。许多学者在研究中观察到关节前间隙小于后间隙，认为髁状突大多都不在中性位[3.4]，关系会对髁突-关节窝位置关系影响。但另一些研究则未发现他们之间的密切联系[5]。
对于骨性III类错，Fernfindez Sanroman[2]研究发现III类只有10%存在关节紊乱和关节盘前置，而II类则有53.6%。Zane Krisjane等证实现骨性III错39 ......
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