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目的:比较恒牙列初期不同垂直骨面型患者颞下颌关节窝的形态特点。方法:采用计算机X线头影测量技术,对恒牙列初期不同垂直骨面型患者牙尖交错位颞下颌关节侧位体层片进行测量分析,比较各组间颞下颌关节窝的形态特点。结果:关节结节高度、关节窝高度、关节窝前斜面与水平基准线的夹角由大到小依次为低角组、均角组、高角组。关节窝前后斜面切线的夹角由大到小依次为高角组、均角组、低角组,关节窝宽度高角组比低角组、均角组明显增大。结论:恒牙列初期不同垂直骨面型患者的颞下颌关节窝形态有显著差异,低角骨面型患者的关节窝深而陡,高角骨面型患者关节窝浅而平,均角骨面型患者介于两者之间。
OBJECTIVE: To compare the morphological features of temporomandibular joint fossa in patients with different vertical facial types at the initial stage of permanent dentition. Methods: By computerized X-ray cephalometric technique, the level of temporomandibular joint was measured in the patients with different vertical skeletal types in the early stage of permanent dentition. The morphological characteristics of the temporomandibular joint were compared. Results: The angle of the joint nodules, the height of the joint, the angle between the anterior socket fossa and the horizontal reference line from low to high were as follows: low angle group, average angle group and high angle group. The angle between tangent tangent before and after the joint socket was in the order of high-angle group, high-angle group, low-angle group and high-angle-angle group. CONCLUSIONS: There are significant differences in temporomandibular joint shape between patients with different vertical facial types in the early stage of permanent dentition. The joints of patients with low-angle facial type are deep and steep. The patients with high-angle facial type have shallow and flat joint surfaces, Type of patients in between the two.