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目的探讨安氏Ⅰ类恒牙青少年女性在牙面特征与其父母的相似性。方法收集颈椎在Cvs3以上骨龄的126例安氏Ⅰ类恒牙青少年女性的X线头颅侧位定位片,将126例女性随机平分为血缘组和非血缘组,其中63例血缘组同时收集其父母的X线头颅侧位定位片,对X线头颅侧位定位片上反映上下颌骨矢状和垂直向、前牙的角度和线距的19个点16项测量值进行测量,测量结果采用SPSS11.5统计软件分别把血缘组和非血缘组与父亲、母亲组的16个变量进行相关性统计学分析、比较。结果安氏Ⅰ类恒牙青少年女性血缘组16项测量值中FH-NP、MP/FH、Ul-NA(mm)、Ul-NA角、U1/L1、U1-SN、Y轴与母亲组相关(r在0.282～0.490间),在NA/PA、Ul-NA(mm)、Ll-NB(mm)、Ll-NB角、U1/L1、MP/SN、MP/FH、U1-SN和L1/MP与父亲组相关(r在0.291～0.476间),而非血缘组16项测量值与父亲、母亲组均无相关性。结论安氏Ⅰ类恒牙青少年女性子女与父母在X线头颅侧位片上反映的许多牙颌特征具有相似性,与父母组相似的方面有所差异,与母亲组在面部生长方向(Y轴)的相关性最高,与父亲组在下前牙相对于下颌骨的倾斜度(L1/MP)的相关性最高。
Objective To investigate the similarities between facial features and parents of Class Ⅰ permanent dentate adolescent women. Methods The X-ray cephalometric images of 126 Class Ⅰ permanent children with permanent teeth with cervical spine above Cvs3 were collected. 126 female patients were equally divided into blood group and non-blood group, 63 of them were collected at the same time Parents of X-ray cephalometric positioning film, X-ray cephalometric positioning film to reflect the upper and lower jaw sagittal and vertical, the angle and pitch of the anterior teeth measured 19 points 16 were measured, the measurement results using SPSS11 .5 The statistical software statistically analyzed and compared the 16 variables of blood group and non-blood group with those of father and mother group respectively. Results The FH-NP, MP / FH, Ul-NA (mm), Ul-NA angle, U1 / L1, U1-SN, Y axis and mothers group (R between 0.282 and 0.490) and the correlation coefficients (r) between NA / PA, Ul-NA (mm), Ll- NB L1 / MP was associated with the father group (r between 0.291 and 0.476), while 16 non-blood group subjects had no correlation with the father or mother group. Conclusions There are similarities in many dento-jaw features between the children with Class Ⅰ permanent dentition and their parents in the X-ray cephalometric slice, which are similar to those in the parent group, and are similar to those in the mother group in the facial growth direction (Y-axis ) Had the highest correlation with the tilt of the lower anterior teeth relative to the mandible (L1 / MP) in the father group.