CAJ | 학술논문

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.
목적 대상합전아아근여아조골재시상향적위치관계진행분류,측량상합전아진악측아조골후도,위심입료해상합전아아근화아조골적관계제공삼고.방법 선택아주건강적한족청년23명[남성9명,녀성14명,평균년령(24.5±1.6)세],대공계138과상합전아박섭추형속CT,통과추형속CT배투연건진행삼유중건처리,조정지합괄적위치급축향,정성분석상합전아아근여아조골적시상향위치관계,병진일보정량측량상합전아진악측아조골적후도.결과 97.1％ (134/138)적상합전아아근시상향위치편향진측골피질,2.9％ (4/138)적아근편향악측골피질;상합전아진측정중골척정하방2 mm화근중부위점부유2.2％(6/276)아조골후도＞2 mm.결론 상합전아아근시상향위치절대다수편향진측,진측아조골교박.
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.