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目的:探讨ANB角、Wits值,W角、YEN值和r角对安氏Ⅲ类错畸形患者颌骨矢状关系评价的可靠性。方法:选取80例恒牙列期安氏Ⅲ类错畸形患者的X线头颅定位侧位片,计算其ANB值、Wits值,W角,YEN角、r角及其变异系数,并对测量结果进行相关性分析。结果:5项测量指标变异程度不同,ANB值、Wits值,W角,YEN角、r角的变异系数分别为0.67、0.45、0.04、0.03、0.10,且5项指标间均存在相关性。结论:ANB值、Wits值、W角、YEN角和r角均可作为评价安氏Ⅲ类患者颌骨矢状向关系的指标,但YEN角可能更具有可靠性。
Objective: To evaluate the reliability of ANB angle, Wits value, W angle, YEN value and r angle in evaluating the sagittal sarcolemma of Angle Class Ⅲ malocclusion patients. Methods: Eighty patients with Angle Ⅲ malocclusion of permanent dentition were selected and their ANB value, Wits value, W angle, YEN angle, r angle and their coefficients of variation were calculated. The results of correlation analysis. Results: The variation degree of the five indexes was different. The coefficient of variation of ANB value, Wits value, W angle, YEN angle and r angle were 0.67,0.45,0.04,0.03,0.10, and there were correlations among the five indexes. CONCLUSIONS: ANB, Wits, W, Y, and r angles can all be used as indices for evaluating the sagittal relationship of the jaw in Class III patients, but the YEN angle may be more reliable.