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目的研究能够敏感反映患者侧貌美观程度的头影测量指标及其标准。方法中国医科大学口腔医学院正畸科2002—2005年117例矫治后患者侧貌剪影图,经16名正畸医师、63名大学生进行美观程度评分,按评分分为高分组和低分组,测量两组患者10项头影测量指标,分析组间各项指标的差异,通过Logistic回归分析,筛选与颜面侧貌美观程度密切相关的指标。结果高分组U1-AP(6.80±1.87)mm,L1-NB(3.29±2.30)mm,FMIA(56.56±6.70)°;低分组U1-AP(8.7±2.17)mm,L1-NB(4.20±3.88)mm,FMIA(49.50±10.28)°,3项指标在两组间均有统计学差异(P均<0.05),其余7项指标组间均无统计学差异(P均>0.05)。Logistic回归分析结果显示,U1-AP值与侧貌美观程度有显著相关性。结论上牙突度是影响侧貌美观的关键因素,治疗目标应以U1-AP突距(6.80±1.87)mm为参考标准。

Investigation of sensitive index and its standard related to the aesthetics of silhouette profile images in orthodontic patients.

Investigation of sensitive index and its standard related to the aesthetics of silhouette profile images in orthodontic patients. *DAI Xin，HOU Zhi-ming，ZHAO Zhen-jin，YAN Xiu-lin， ZHAO Yang. *Jilin Stomatological Hospital ，Jilin 132011，ChinaAbstract：Objective Analyze sensitive indexes and its standard related to aesthetics of silhouette profile images in orthodontic patients. Methods A total of 117 cephalometric radiographs were evaluated by 16 orthodontists and 63 undergraduates and were divided into two groups according to scores. Ten dentoskeletal tissue indexes were calculated in high-score and low-score patients and the difference of indexes between two groups was analyzed. Logistic regression analysis was carried out to obtain sensitive indexes. Results U1-AP was （6.80 ± 1.87）mm，L1-NB was （3.29 ± 2.30）mm，FMIA was （56.56 ± 6.70）°in high-score group， and U1-AP was （8.70 ± 2.17）mm，L1-NB was （4.20 ± 3.88）mm，and FMIA was （49.50 ± 10.28）°in low-score group .There were significant differences in three indexes between two groups（P < 0.05）,and there was no significant difference in other seven indexes（P > 0.05）. U1-AP was significantly related to silhouette profile aesthetic. Conclusion Maxillary incisor is an important factor affecting profile aesthetics and U1-AP is emphasized in design and treatment.