张口受限是智齿冠周疾患和颞下颌关节疾病的主要症状之一。前对张口度的测量和记录的方法也不统一。也缺乏正常人的生理值作参考。作者测量2000例健康男性青年(高考学生)最大张口时的(牙合)间距离,并作统计分析,报告如下。受检者年龄为19～21岁,发育良好,体格健全,无 One of the main symptoms of periapical disorders and temporomandibular joint diseases is restricted mouth opening. The method of measuring and recording before the mouth opening is also not uniform. Also lack of normal physiological value for reference. The authors measure the distance between the occlusion of 2000 healthy male youths (college entrance exams) and their maximum mouth opening, and make statistical analysis. The report is as follows. Subjects aged 19 to 21 years old, well-developed, physically sound, without