成人与青少年在内收上前牙的正畸治疗中牙根吸收的比较研究(1)
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[摘要]目的:探讨成人与青少年在内收上前牙的正畸治疗中牙根吸收的差异。方法:选择运用直丝弓矫治技术矫治完成的上颌前突并拔牙矫治患者79例,其中成人患者38例,青少年患者41例。在其矫治前后的曲面断层片上对4个上颌切牙进行牙根形态观察及冠根长度的测量,以获得正畸治疗后牙根吸收的定性及定量资料。利用SPSS 11.0软件对所得资料进行检验分析。结果:治疗后成人患者上颌中切牙的根吸收量大于侧切牙,成人患者上颌中切牙的根吸收量亦大于青少年患者,差异有统计学意义(P<0.05);同时,治疗后成人与青少年患者上颌中切牙的牙根吸收等级分布存在差异(P<0.01)。结论:成人在上颌前牙的内收矫治中中切牙的根吸收风险较大。
[关键词]成人;青少年;上颌切牙;正畸治疗;根吸收
[中图分类号]R783.5 [文献标识码]A [文章编号]1008-6455(2010)07-1018-03
Analysis of the root resorption after the orthodontic treatment of upper incisors retraction between adults and adolescents
FANG Zhi-xin,ZHOU Yan,CHEN Shi-wen,HUANG Min-fang
(Department of Orthodontics,People's Hospital of Guangxi Zhuang Autonomous Region,Nanning530021,Guangxi,China)
Abstract:ObjectiveTo investigate the difference of the root resorption after the orthodontic treatment of upper incisors retraction between adults and adolescents.Methodsseventy-nine patients(38 adults, 41 adolescents) with maxillary protrusion treated with extraction by straight wire appliances were selected.Root morphology were observed and the length of root and crown were measured in the panoramic radiographs before and after treatment to obtain the qualitative and quantitative data of root resorption of the upper incisors.The data were analysed by SPSS11.0 software package.ResultsAfter treatment,root resorption of upper central incisors in adults was more severe than that of lateral incisors And root resorption of upper central incisors in adults was more severe than that in adolescents.These differences were statistically significant(P<0.05).The grade of root resorption of upper central incisors of adults was different from that of adolescents(P<0.01). ConclusionAdults suffer more severe root resorption in upper central incisors after the orthodontic treatment of upper incisors retraction.
Key words:adults;adolescents;upper incisor;orthodontic treatment;root resorption
正畸治疗不仅要给患者一副排列整齐、功能良好的牙齿,还要尽可能为患者创造一个美观协调的侧貌。上前牙的内收是矫治患者过突侧貌的重要手段。虽然正畸治疗的根吸收影响因素较多,目前尚无定论,但从临床观察发现根吸收与年龄、牙齿移动距离、牙位有较大的关系。本研究针对上颌前突拔牙矫治患者的上切牙矫治后的根吸收情况进行研究,探讨在内收上前牙矫治时,根吸收与年龄及牙位的关系 ......
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