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此次调查均按最大张口度为准,受检对象均为城市居民,按自然人群分布、检查户数为629户,人数为1986人,为便于统计共分12个年龄组,各组年龄间距不等.张口度从2.0～5.0cm以上,分为七组.并对颞颌关节弹响及疼痛进行了调查、二岁组内由于语言困难、无法取深准确数据,3～4岁组的部分受检者,只能称为自然张口度。切牙缺失者,半口和全口缺牙者,按戴假牙的切牙间距测量。调查方法及要求、我们采用标准的工业用钢尺,取坐位面部垂直于地面,测得最大张口度做为记录数据.开始于上颌正中切牙的切缘,止于下颌正中切牙的切缘的垂直距离,通常称作切牙间距。
The survey is based on the maximum mouthfulness prevail, the subjects were urban residents, according to the distribution of natural populations, check the number of 629 households, the number of 1986 people, for the convenience of statistics is divided into 12 age groups, the age of each group Ranging from 2.0 to 5.0cm or more, divided into seven groups.And the temporomandibular joint snapping and pain were investigated in the two-year group due to language difficulties, unable to obtain deep and accurate data, 3 to 4-year-old group Some subjects, can only be called natural mouth-opening. Incisors were missing, half-mouth and full-mouth were measured according to the denture's molar incisors. Survey methods and requirements, we use the standard industrial steel ruler, take the sitting face perpendicular to the ground, measured the maximum mouth opening as the recorded data began in the maxillary incisors cut edge, stop at the mandibular incisors cut edge The vertical distance, commonly referred to as the incisor spacing.