广东地区正常男女颏部形态X线头影测量对比分析

Comparative analysis of the morphology of chin X-ray cephalometry of Cantonese male and female with normal occlusion

目的研究广东地区正常人群颏部形态特征,建立颏部形态的X线头影测量数据库,为临床正畸治疗和颏部整形治疗提供数据参考。方法筛选广东地区正常样本44名(男性20名,女性24名),在自然头位、正中位及唇放松状态下拍摄头颅侧位片。应用Winceph 7.0头影测量软件进行定点测量反映颏部形态的角度测量指标、反映颏部硬组织的线距测量项目指标以及反映颏部软组织的线距测量项目等,并对男、女性别的数据进行统计分析。结果广东地区正常人群颏部形态的X线头影测量数据显示颏倾斜度、颏角均具有性别差异。男性的颏倾斜度和颏角均小于女性,差异具有统计学意义(P<0.05)。男性颏曲度与女性比较,差异无统计学意义(P>0.05)。颏部硬组织的线距测量指标均没有性别差异,差异没有统计学意义(P>0.05)。颏唇沟深度男女性别具有差异,男性的颏唇沟深度大于女性(P<0.05)。结论广东地区正常人群颏部形态特征的头影测量数据显示部分指标具有性别差异,在临床正畸治疗和面部整形治疗中应充分考虑颏部形态特征和性别差异。

Objective To study the chin morphology of Cantonese with normal occlusion, and to establish the cepha-lometric database of the chin morphology for providing reference data for clinical orthodontic treatment and surgical treat-ment of Chin. Methods The lateral cephalometrics radiographs of 44 untreated samples(20 men, 24 women) were takenin natural head position, centric oclusion and lip relaxed position. The chin characteristic variables were measured byWinceph 7.0 software three times by one orthodontists. Mean and standard deviations of measurements were determinedfor each gender. The t-test was used to compare the values between males and females. Results The obtained data werestatistically analyzed and compared between male and female. There are sex difference in M-Me to MP/ B-Me to MP andB′ to Li-Pog′(mm). There is no sex difference in Chin curvature. Conclusion The normative data for the Southern Chi-nese should be uesd as a guide for diagnosis and treatment of chin deformities. The maxillofacial surgeon and orthodontistshould consider the sex difference. Gender differences must be taken into consideration during orthodontic diagnosis andtreatment planning for the individual patient.