汉族青年人上颌前牙牙根位置及牙槽骨厚度的测量分析  

Measurement of sagittal root position and the thickness of the facial and palatal alveolar bone of maxillary anterior teeth

作　　者：杨刚[1] 胡文杰[1] 曹洁[1] 柳登高[2] 

机构地区：[1]北京大学口腔医学院·口腔医院牙周科,100081 [2]北京大学口腔医学院·口腔医院口腔颌面放射科,100081

出　　处：《中华口腔医学杂志》2013年第12期716-720,共5页Chinese Journal of Stomatology

基　　金：首都卫生发展科研专项（首发2011-4025-04）;教育部留学回国人员科研启动基金（2012-45）;2010年国家临床重点专科建设项目

摘　　要：目的 对上颌前牙牙根与牙槽骨在矢状向的位置关系进行分类,测量上颌前牙唇腭侧牙槽骨厚度,为深入了解上颌前牙牙根和牙槽骨的关系提供参考.方法 选择牙周健康的汉族青年23名[男性9名,女性14名,平均年龄（24.5±1.6）岁],对共计138颗上颌前牙拍摄锥形束CT,通过锥形束CT配套软件进行三维重建处理,调整至合适的位置及轴向,定性分析上颌前牙牙根与牙槽骨的矢状向位置关系,并进一步定量测量上颌前牙唇腭侧牙槽骨的厚度.结果 97.1％ （134/138）的上颌前牙牙根矢状向位置偏向唇侧骨皮质,2.9％ （4/138）的牙根偏向腭侧骨皮质;上颌前牙唇侧正中骨嵴顶下方2 mm和根中部位点仅有2.2％（6/276）牙槽骨厚度＞2 mm.结论 上颌前牙牙根矢状向位置绝大多数偏向唇侧,唇侧牙槽骨较薄.Objective To classify the relationship of the sagittal root positions of the maxillary anterior teeth to their respective osseous housings,and to measure the thickness of facial and palatal alveolar bone by cone-beam computed tomography（CBCT）.Methods Twenty-three subjects [9 male,14 female,mean age：（24.5 ± 1.6） years] who fulfilled the inclusion criteria were involved in this study.The CBCT images were evaluated and the relationship of the sagittal root position of the maxillary anterior teeth to its associated osseous housing was recorded as Kan＇s Class 1,2,3,4.The facial and palatal alveolar bone thickness at three locations：2 mm apical to crest level,mid-root level and apical level,was measured respectively.Results Ninety seven point one percent（134/138） of the anterior maxillary teeth were classified as Class 1.Only 2.9% （4/138） were Class 4.Occurrences of 〉2 mm thickness of maxillary facial alveolar bone were found 2.2% （6/276 sites） at 2 mm apical to crest level and mid-root level in the sample of maxillary anterior teeth.Conclusions The majority of the anterior maxillary teeth roots were positioned close to the labial cortical plate.Most tooth sites in the anterior maxilla had a thin facial bone wall.

关 键 词：牙根 锥束计算机体层摄影术 牙槽骨厚度 前牙 

分 类 号：R782.2[医药卫生—口腔医学]