上颌埋伏尖牙定位及邻牙牙根吸收的多层螺旋CT分析
罗小娟;张智星;毛靖;马威;李建军
【期刊名称】《临床口腔医学杂志》 【年(卷),期】2012(028)003
【摘要】目的:应用多层螺旋CT (MSCT)对上颌埋伏尖牙进行三维立体定位,同时对邻牙牙根的吸收程度进行评估.方法:应用MSCT扫描38例上颌埋伏尖牙,在多平面重建和容积再现软件中对其三维定位,上颌切牙牙根吸收程度进行分析,并与传统X线平片进行比较.结果:38例上颌埋伏尖牙都能使用MSCT进行准确定位,侧切牙牙根吸收率为36.6％,中切牙的牙根吸收率为16.3％,在牙列中受埋伏尖牙影响最大的是侧切牙的牙根.MSCT评价上颌中切牙及侧切牙牙根吸收的阳性率高于传统X线平片,其差异具有统计学意义.结论:使用MSCT多平面重建和容积再现技术能直观准确地对埋伏尖牙进行定位、诊断邻牙牙根吸收程度,对临床正畸治疗埋伏牙有很高的应用价值.%Objective: The purpose of the study was to localize impacted maxillary canines and to evaluate the resorption of the adjacent teeth roots using multi-slice CT (MSCT). Method: Thirty-eight impacted maxillary canines were analyzed by Multi-planar reformation (MPR) and volume rendering (VR) on the work station of GE light speed medical system after CT scan. The linear distance and the angles of the maxillary canines were measured in three-dimensional. The extent of the incisor resorption both on conventional X-rays and CT scans was compared. Result: MSCT can detect the position of the impacted maxillary canines as well as the
上颌埋伏尖牙定位及邻牙牙根吸收的多层螺旋CT分析
