不同医师探寻离体上颌第一恒磨牙MB2根管口的可靠性评价

目的：评价不同医师探寻离体上颌第一恒磨牙MB2根管口的可靠性。方法：100个离体上颌第一恒磨牙开髓后，两名医师2次独立探寻MB2根管口，2次间隔2周，用Kappa分析法评价其一致性。结果：MB2的平均发现率52．3％，2名医师2次比较的Kappa值分别为0．701和0．678，属高度一致性；同一医师自身前后比较的Kappa值分别为0．861和0．844，属极好一致性。结论：MB2在上颌第一恒磨牙中比较常见，不同医师不同时间对离体磨牙MB2根管口的判断较为稳定。

Assessment of reliability of second mesiobuccal canals in extracted maxillary first molars as located by different observers

AIM:To study the reliability of second mesiobuccal canals in extracted maxillary first molars as located by different observers at different times.METHODS: 100 extracted human maxillary first molars were determined by two observers to locate the second mesiobuccal canals independently at 2 times with 2 weeks interval.Then the results were analysed with Kappa statistics.RESULTS: MB2 were located in 52.3% of first molars.The Kappa value for inter-observer agreement was 0.701 and 0.678,Which means substantial agreement.The Kappa value for intra-observer agreement was 0.861 and 0.844,which means almost perfect agreement.CONCLUSION: The(incidence) of MB2 is familiar comparatively in first molars.The reliability of location of MB2 by different observers at different times is steaty.