摘要
目的:探讨显微CT在根管峡区形态定性定量研究中的应用。方法:收集单根上颌前磨牙,显微CT扫描及三维重建后,筛选出五颗有根管峡区的牙,分析峡区横断面百分比以及横断面峡区类型,测量峡区至釉牙骨质界距离(DCEJ)以及至解剖根尖距离(DApex),并分析峡区根管的结构模型指数(SMI)。结果:峡区横断面百分比为81.8%,其中完全峡区(CI)占72.8%,部分峡区(PI)占9%;DCEJ为(0.79±0.55)mm,DApex为(1.55±0.86)m;峡区根管的SMI为1.20±0.43。结论:显微CT结合三维重建技术能够对根管峡区形态进行定性定量分析,是研究根管峡区较理想的方法。
Objective： To investigate the application of micro--computed tomography in the qualitative and quanti- tative analyses of root canal isthmuses. Methods： Five one--rooted maxillary premolars with root canal isthmuses were selected after being scanned and reconstructed. Then the percentage of cross--sections containing isthmus and the isthmus type were investigated. The distance from isthmus to cemento--enamel junction （DCEJ） and the distance from isthmus to apex （DApex） were measured. Furthermore, the structure model index （SMI） of the root canal with isthmuses was analyzed, Results： The percentage of total cross--sections containing isthmus was 81. 8%, and the complete isthmus （CI） and partial isthmus （PI） was 72.8% and 9%, respectively. DCEJ Was 0.79± 0.55mm and DApex was 1.55±0.86mm. SMI of the root canal with isthmuses was 1.20±0.43. Conclusion： Micro- CT and three--dimensional reconstruction technique are ideal methods to assess root canal isthmuses morphology qualitatively and quantitatively.
出处
《口腔医学研究》
CAS
CSCD
北大核心
2010年第1期64-66,共3页
Journal of Oral Science Research
基金
国家自然科学基金(编号:30872881)
关键词
根管峡区
显微CT
三维重建
上颌前磨牙
Root canal isthmus Micro--computed tomography 3--D reconstruction Maxillary premolar
