螺旋CT三维重建对牙体治疗中根管外断针定位研究  

Three dimensional reconstruction technology of spiral CT in locating fractured endodontic instrument lying beyond the apical foramen

作　　者：师莉芳[1] 秦瑞峰[2] 白芝兰[1] 张秋娟[1] 张晓娜[1] 

机构地区：[1]陕西西安西安交通大学医学院第二附属医院,710004710032 [2]陕西西安第四军医大学口腔医学院,710032

出　　处：《牙体牙髓牙周病学杂志》2013年第10期666-668,共3页Chinese Journal of Conservative Dentistry

摘　　要：目的:探讨螺旋CT三维重建技术在对牙体治疗中根管外断针定位、成像及临床应用价值。方法:对12例根管外断针拍根尖片并进行牙列轴位螺旋CT扫描,应用表面遮盖技术、多层面重建和容积再现法螺旋CT后处理技术获得断针立体图像以及任意平面,曲面断层影像。结果:螺旋CT能清晰直观显示根管外断针的具体位置、立体形态、长度以及与相邻组织结构的关系。结论:螺旋CT能精准定性、定位根管外断针,并为手术取出断针提供最详实的影像学信息。AIM：To study the clinical value of three-dimensional reconstruction technology of spiral CT （3DSCT） in locating fractured endodontic instrument lying beyond the apical foramen.METHODS：12 cases with fractured endodontic instrument lying beyond the apical foramen were examined with spiral CT and periapical radiograph.All cases received shaded surface display （SSD）,multiplanar reconstruction （MPR） and volume rendering （VR） methods afterwards.RESULTS：3DSCT could clearly demonstrate the fractured endodontic instrument lying beyond the apical foramen,not only its location,orientation and length,but also its relation with surrounding structures.CONCLUSION：3DSCT is an effective diagnostic aid for localizing the fractured endodontic instruments.

关 键 词：螺旋CT三维重建技术 表面遮盖技术 多层面重建 器械折断 

分 类 号：R781.05[医药卫生—口腔医学]