埋伏上尖牙与侧切牙发生不完全易位的矫治方法研究  

Study of treatment approach for maxillary impacted canine-lateral incisor incomplete transposition

作　　者：李爱霞[1] 李相如[1] 

机构地区：[1]郑州大学第一附属医院口腔正畸科,河南450052

出　　处：《中华口腔正畸学杂志》2014年第4期185-189,共5页Chinese Journal of Orthodontics

摘　　要：目的 探讨埋伏阻生上尖牙与侧切牙发生不完全易位后的导萌方法,将易位的尖牙牵引至正常位置,以达到美观效果,行使正常功能.方法 选择不完全易位的单侧埋伏阻生上尖牙患者12例（男6例,女6例）,年龄11.5～21.0岁,平均14.5岁,其中尖牙偏腭侧阻生7例,偏颊侧阻生5例.外科手术暴露埋伏牙,应用固定矫治技术,调整牵引方向将埋伏牙牵引至正常位置.结果 易位的尖牙均与侧切牙发生位置交换,尖牙移至正常位置,且具有良好的冠根方向和咬合关系,尖牙及侧切牙均无明显根吸收.平均疗程19个月.结论 将不完全易位的埋伏尖牙牵引入正常位置的难点在于易位埋伏的尖牙翻越相邻侧切牙牙根时,二者不相互阻挡.解决此难点的关键是精确判断尖牙牙冠与侧切牙牙根的位置关系,适时调整牵引方向.Objective To discuss an challenging treatment approach for maxillary impacted canine-lateral incisor incomplete transposition so that incomplete transposed canines can be guided to erupt to their normal position in the arch and warrant good function and esthetic outcome.Methods Twelve patients（6 female,6 male） aged 11.5-21.0 years old （average was 14.5 years old） with unilateral incomplete transposed maxillary canines （7 palatally positioned,5 buccally） were included in this study.All the impacted canines were brought to their normal position with fixed orthodontic appliances to guide traction direction after surgical exposure.Results Displacedd canines were brought to their normal positions with normal angulation and occlusal relationship and without root resorption after an average of 19-month-treatment.Conclusions The difficulties of the treatment are in the ways of avoiding roots contacts and root resorptions during correction of transposition.The key point is to accurately recognize the relationship between the canine crown and lateral incisor root.In-time adjustment of traction direction can guide the incomplete transposed impacted canine into their normal position in the arch.

关 键 词：不完全易位 阻生上尖牙 定位 牵引 

分 类 号：R783.5[医药卫生—口腔医学]