目的 建立本地区正常X青少年X线头影测量值标准.方法 选择120例常州籍汉族正常X青少年拍摄头颅定位侧位X线片,用Steiner及Tweed分析方法做角度测量及线距测量.男、女青少年间进行比较,观察不同性别正常值间的差异;分别和长春、西安男、女青少年进行比较,观察不同地区同一性别青少年正常值间的差异.对所有测量结果进行统计分析.结果 建立了常州地区汉族正常X青少年硬组织的X线头影测量正常值标准,并比较性别差异及地区差异.结论 同一地区不同性别正常X青少年Steiner及Tweed分析法测量值间差异无统计学意义;不同地区正常X青少年X头影测量值间有一定的差异.“,”Objective To establish the standard values of cephalometry in adolescents with normal occlusion in Changzhou district.Methods 120 Han ethnic subjects evaluated in the study by normal occlusion,were selected to take lateral cephalograph. Linear and angular measurements were calculated,and cephalometrics parameters were analyzed based on application of Steiner and Tweed methods.The normal values were compared with those from Changchun and Xi′an.Results The norms with derivation for all measurement of X ray cephalometric analysis on hard tissues were established.Meanwhile,difference is shown in some hard tissue measurements with normal occlsion between the adolescents from Changzhou and from Changchun、Xi′an.Conclusion Difference exists in different regional population.