【摘要】 目的:探讨固定矫治所致的牙根吸收的因素中,性别和年龄因素与根吸收之间的关系。方法:将44例患者按性别和年龄分为青少年男性组和女性组,成年男性组和女性组,共4组。根据正畸治疗前后全口曲面断层片和记存模型,测量计算出治疗前后切牙的全长,进行配对t检验,分析固定矫治前后性别和年龄因素与根吸收之间的关系。结果:所有患者治疗后均发生根吸收(P<0.001)。男女性的青少年组与成年组之间,根吸收的量均有显著性差异(P<0.01),但相同年龄组的男女性之间比较无显著差别(P>0.05)。结论:固定矫治治疗后,切牙牙根均发生吸收。固定正畸治疗所致的牙根吸收与性别无明显相关性,但成年人的根吸收显著大于发育期的青少年。更多还原

【Abstract】 PURPOSE: To investigate the relationship between root resorption related to fixed appliance and the variables including sex, age. METHODS: 44 patients were divided into four groups according to sex and age: juvenile males, juvenile females, adult males, adult females. The length of incisors was calculated according to orthopantomograph and study models of pre- and post-treatment, and the relationship between patients’ sex and age and root absorption pre- and post-treatment was analyzed by paired t test. RESULTS: Root absorption occured in every patient. There was no significant difference between the same-age groups of males and females(P<0.05); However, there was significant difference between adult groups (both males and females) and juvenile groups(P<0.01). CONCLUSION: Root absorption occurs in every fixed-appliance case. Fixed-appliance-caused root absorption has no significant correlation with sex;however, absorption of adult groups is of higher level than that of juvenile groups.更多还原