恒牙初期正常软组织侧貌的E线分析

Soft tissue profile of normal occlusion in the early permanent dentition:E line analysis

目的:探讨恒牙初期侧貌美观正常上下唇突点到审美线(E线)的距离及E线各段间的比例关系。方法:2000-01/2005-12筛选恒牙初期侧貌美观正常汉族青少年30名,男15名,女15名;年龄平均11.5岁。常规拍摄头颅侧位定位片,分别测量上唇突点-E、下唇突点-E的距离及上唇段/鼻尖点-软组织颏前点、唇间段/鼻尖点-软组织颏前点、下唇段/鼻尖点-软组织颏前点比值的均值和标准差。结果:①上唇、下唇突点E线距:侧貌美观正常上唇突点-E、下唇突点-E距离分别为(0.0833±0.9208)mm和(0.6217±1.1246)mm。②各部分占鼻尖点-软组织颏前点的比例:上唇段/鼻尖点-软组织颏前点,唇间段/鼻尖点-软组织颏前点,下唇段/鼻尖点-软组织颏前点分别为0.4138±0.0223,0.2009±0.0231,0.3857±0.0228。结论:E线分析法用于临床软组织侧貌诊断简洁高效,矢状方向上下唇突点基本位于其上,即与鼻尖点、颏前点4点共线;垂直方向上3段比例基本为2∶1∶2。

AIM：To explore the distance from the labrale supenus and inferius of the soft tissue profile in eady permanent dentition with normal ocdueion to the esthetic line （E line） and the proportion among each section of E Plane. METHODS： Thirty Han teenagers with normal occlusion including 15 males and 15 females with the average age of 11.5 years were selected from January 2000 to December 2005. They were examined cephalometrially to measure the distance between labrale superius （Ls） and E, labrale inferius （Li） and E, and the mean values and standard deviation of prenasele （Pm）-Ls/distance between Pm and pogortion （Pg＇） of soft tissue, Ls-Li/distance between Pm and Pg＇ and U-Pg＇/distance between Pm and Pg＇. RESULTS： ①Distance of Ls-E and Li-E： Ls-E and Li-E of normal ocdusion were （0.083 3±0.920 8） mm and （0.621 7±1.124 6） mm.②Pmportion of each Segment to the distance of Pm and Pg＇： Pm- Ls/Pm-Pg＇, Ls-Li/Pm-Pg＇ and Li-Pg＇/Pm-Pg＇ were 0.413 8±0.022 3, 0.200 9±0.023 1, 0.385 7±0.022 8, respectively. CONCLUSION： E plane analysis is a convenient and effective method in the diagnosis of soft tissue in clinic. The Ls and Li are exactly on the E plane in normal occlusion and the ratio of three sections is 2：1：2.