Condyle and fossa shape in Class II and Class III skeletal patterns: A morphometric tomographic study
Condyle and fossa shape in Class II and Class III skeletal patterns: A morphometric tomographic study
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DOI：
10.1016/j.ajodo.2004.05.024
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发表时间：
2005-09-01
影响因子：
3
通讯作者：
Halazonetis, DJ
中科院分区：
文献类型：
--
作者：
Katsavrias, EG;Halazonetis, DJ
简介：本研究的目的是研究II类1分类、II类2分类和III类错牙合患者的髁突和关节窝的形状。方法：使用了189例患者的轴向校正断层图像（109例II类1区，47例II类2区，33例III类）。对髁突上的5个点和窝轮廓上的7个点进行了数字化。通过每个结构的质心大小评估大小，并通过Procrustes残差的主成分分析进行形状测量。结果和结论：形态主成分分析显示，髁突形态变异主要与髁头倾斜度有关，髁窝形态变异主要与髁突隆起倾斜度和髁窝高度有关。仅III类组的质心大小与年龄相关。两组的髁突和窝形状不同; III类组的髁突头更长且向前倾斜，窝更宽且更浅。在III类组中，髁突更靠近窝顶。2个II类分类仅髁突在窝中的位置不同，在II类1分类组中髁突位于更靠前的位置。
Introduction: The purpose of this investigation was to study the shapes of the condyle and the glenoid fossa in patients with Class II Division 1, Class II Division 2, and Class III malocclusions. Methods: Axially corrected tomograms of 189 patients were used (109 Class II Division 1, 47 Class II Division 2, and 33 Class III). Five points on the condyle and 7 on the outline of the fossa were digitized. Size was assessed by the centroid size of each structure, and measurements of shape were made by principal component analysis of the Procrustes residuals. Results and Conclusions: Inspection of the principal components of shape showed that shape variability of the condyle was mainly related to inclination of the condylar head; shape variability of the fossa was related to inclination of the eminence and fossa height. Centroid size was correlated to age in the Class III group only. Condylar and fossa shapes were found to be different between the groups; the Class III group had a more elongated and anteriorly inclined condylar head and a wider and shallower fossa. In the Class III group, the condyle was closer to the roof of the fossa. The 2 Class II divisions differed only in the position of the condyle in the fossa, which was situated more anteriorly in the Class II Division 1 group.