早已脱落的牙齿。
Some had different degree defect of dentition, deciduous tooth retention, caries or periodontitis.有些病例伴有牙列缺损,有些病例还有乳牙滞留、龋病、牙周病等。
Objective: to investigate the deciduous tooth caries experience of 5 year old children in Yunnan province.目的:了解云南省5岁儿童乳牙龋齿患病情况。