牙列缺失危害人类的健康。我国有11亿人口,国土辽阔,不同区域及人群间的差异,有关资料甚少,故将我校调查结果整理如下: 资料来源我科在1987年的教职工体检中,对1166名教职工分别按性别、年龄、职别、牙列缺失及修复等情况逐一进行登记,对缺失原因及修复 Dentition damage endanger human health. Our country has a population of 1.1 billion, a vast territory, differences between different regions and populations, and there is very little information about it. Therefore, the survey results of our university are summarized as follows: Source of information In 1987, the medical staff of our department examined 1,166 staff members Registration by sex, age, occupation, absence of dentition and repair, etc.