Zhang Duan-qiang, Shi Xie, Zheng Min-qian
Dept. of Orthodontics, Stomatology Hospital, Fujian Medical University, Fuzhou 350002, China.
Hua Xi Kou Qiang Yi Xue Za Zhi. 2004 Dec;22(6):496-8.
To study the coordination of facial soft tissue in Angle's Class I, II1, III malocclusion, providing reference for the clinical practice.
60 lateral cephalometric radiographs of three classes of Angle's malocclusion were included. 13 measurements were analyzed by SPSS 10.0.
Protrusion of the upper and lower lips increased in Angle's II1 comparing with Angle's I and protrusion of the upper lip was larger than the lower lip, no difference was found in the facial convexity. Increase of upper lip inclination and underdevelopment of maxillary in Angle's III comparing with Angle's I. No significant different was found in the form of lower lip, soft tissue facial angle and Z angle. Comparing Angle's II1 with Angle's III, every measurements were significantly different except upper lip inclination, nasolabial angle, representing the formation mechanism of malocclusion.
Some differences were found in form and position of lip in three classes of Angle's malocclusion. However, the deformity was not obvious in Angle's II1 and Angle's III because of compensation mechanism. Nasolabial angle only reflected change of upper lip, but could not reflect characters of facial profile.
研究安氏Ⅰ类、Ⅱ1类、Ⅲ类错牙合畸形面部软组织的协调性，为临床实践提供参考。
纳入60张三类安氏错牙合畸形的头颅侧位片。采用SPSS 10.0软件对13项测量指标进行分析。
与安氏Ⅰ类相比，安氏Ⅱ1类上下唇突度增加，且上唇突度大于下唇，面部凸度无差异。与安氏Ⅰ类相比，安氏Ⅲ类上唇倾斜度增加，上颌发育不足。下唇形态、软组织面角及Z角未见明显差异。安氏Ⅱ1类与安氏Ⅲ类相比，除上唇倾斜度、鼻唇角外，各项测量指标均有显著差异，体现了错牙合畸形的形成机制。
三类安氏错牙合畸形在唇的形态和位置上存在一些差异。然而，由于代偿机制，安氏Ⅱ1类和安氏Ⅲ类的畸形并不明显。鼻唇角仅反映上唇的变化，不能反映面部侧貌特征。
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