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目的探讨曲面体层机中侧位纵向体层程序P21～23的投照技术及其在前牙区埋伏牙定位中的应用价值。方法选取50例经曲面断层片或根尖片诊断为埋伏牙的患者,应用程序P21～23投照,分析埋伏牙的准确位置,并与埋伏牙拔除术中所见对比。结果侧位纵向体层程序P21～23定位埋伏牙50例,其中偏唇侧13例,偏腭侧30例,居中7例,患牙的X线诊断与术中所见一致,准确率为100%。结论侧位纵向体层程序P21～23是前牙区埋伏牙定位中更直接有效的方法。
Objective To explore the projection technology of lateral longitudinal body layer procedure P21 ~ 23 in curved body laminator and its application in the localization of impacted teeth in anterior teeth area. Methods Fifty patients diagnosed as impacted teeth with curved or apical slices were enrolled in the study. Application P21 ~ 23 were applied to analyze the accurate position of the impacted teeth and compared with that of ambushed tooth extraction. Results The lateral longitudinal layer procedure P21 ~ 23 located ambush teeth in 50 cases, of which 13 cases of partial lip side, palatal palatal side in 30 cases, 7 cases of center, the diagnosis of X-ray teeth and intraoperative findings, the accuracy rate of 100 %. Conclusions The lateral longitudinal slice procedure P21 ~ 23 is a more direct and effective method for locating the impacted tooth in anterior teeth.