为考察高原地区错(牙合)畸形的发病情况,我科于1980年7月至1981年5月分两批对冷湖地区928名13～17岁中学生的恒牙颌进行了普查。报告如下: 对象和方法调查对象为常年居住在高原地区的汉族职工子弟。检查均在医院集中进行。用探、视、诊 To investigate the incidence of malocclusion in the plateau, our department conducted a survey of 928 permanent dentures of middle school students aged 13 to 17 years in the cold lake region from July 1980 to May 1981. The report is as follows: Subjects and methods The survey respondents are Han workers and children who live in the plateau all year round. Check in the hospital focus. Exploration, visual, clinics