上颌尖牙埋伏阻生的临床分析

目的对上颌尖牙埋伏阻生的患病特点及治疗结果进行分析,以期为临床治疗上颌尖牙埋伏阻生提供参考数据。方法在北京大学口腔医学院·口腔医院正畸科门诊2001年1月至2005年1月期间诊治的10505例错(牙合)畸形患者中,经CT检查选出上颌尖牙埋伏阻生患者215例(汉族),共有埋伏阻生尖牙248颗。统计上颌尖牙埋伏阻生在正畸患者中所占比例,χ~2检验分别比较患者性别、唇腭侧阻生以及相应治疗情况的差异。结果上颌尖牙埋伏阻生在正畸门诊患者中约占2．05%,女性：男性为1．8∶1,唇侧：腭侧为2．1∶1。“外科手术暴露+正畸牵引”的方式在治疗中占主导地位。“外科手术拔除”的治疗方式在腭侧埋伏阻生尖牙中的应用多于唇侧,差异有统计学意义(P＜0.01)。结论本组患者上颌尖牙埋伏阻生以女性、唇侧多见,临床对唇腭侧尖牙埋伏阻生的治疗存在一定差异。

Clinical investigation of impacted maxillary canine

Objective To investigate the frequency,sex differences and location of impacted maxillary canine in orthodontic patients.Methods Two hundred and fifteen patients (77 males and 138 females) with maxillary canine impaction were included in the study.The experimental group was gathered from the Department of Orthodontics,Peking University School and Hospital of Stomatology.CT scan images were evaluated.Chi-square test was used in the analysis.Results The prevalence of maxillary canine impaction among Chinese orthodontic patients was 2.05%.The ratio between male and female was 1.8:1 and the ratio between buccal and palatal location was 2.1:1.Surgical exposure and orthodontic aligmnent had been predominant in such conditions.There was significant deference in the treatment between palatally impacted canine and buccally impacted one.More palatally impacted canines were extracted than buccally impacted ones.Conclusions There was significant difference in the treatment of maxillary canine impaction.More buccally impacted canines were found in Chinese patients,especially in female patients.