摘要
调查７３１例正畸患者的全颌曲面断层Ｘ线片，其中男性３０６人、女性４２５人，年龄７～２８岁，统计其恒牙先天缺失情况，第三恒磨牙缺失未作统计，恒牙先天缺失者６４人，缺失牙１０５颗，缺牙率为８．７６％，其中男性缺牙者２１人，缺牙率为６．８６％；女性缺牙者４３人，缺牙率为１０．１２％，男女缺失牙发生率无显著差别，同名牙双侧对称缺失与单侧不对称缺失无明显差异；缺失牙在下颌明显多于上颌；左右侧无差别；缺失２颗牙以下者明显多于４颗牙以上者。缺牙最多发生在下颌切牙，依次为上颌侧切牙和下颌第二前磨牙。
Pan-tomographic investigation was done on 731 orthodontic patients (306males,425 females,7～28 years of age). Sixth-four patients with 105 missing teeth were discovered.The missing rate is 8.76% (21 males,missing rate 6.86%;43 females,missing rate 10.12%).The difference in sex,however,is not statistically significant.The only in teresting finding of statistical significance is the missing rate in lower jaw is higher than that in the upper jaw. Patients with 2 teeth missing are the most common with Hypodontia in lower incisor,uppor lateral incisor and lower second premolar.
出处
《南京医科大学学报（自然科学版）》
CAS
CSCD
1994年第4期574-575,共2页
Journal of Nanjing Medical University(Natural Sciences)
