Radiographic evaluation of root canal multiplicity in mandibular first premolars
Radiographic evaluation of root canal multiplicity in mandibular first premolars
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DOI：
10.1097/00004770-200402000-00002
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发表时间：
2004-02-01
影响因子：
4.2
通讯作者：
Suda, H
中科院分区：
文献类型：
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作者：
Yoshioka, T;Villegas, JC;Suda, H
本研究旨在探讨下颌第一前磨牙根管多样性的放射学评价的准确性。一百三十九个提取人下颌前磨牙。拍摄颊舌侧X线片，并由四名牙医使用视图框在X线片上确定每个牙齿中的根管数量。主运河突然变窄被解释为多个运河的迹象。在放射学评估后，牙冠被移除。将墨汁注入根管系统内，清洁牙根，观察根管形态。四位医师的X线片根管数目与清牙观察根管数目的符合率（93%~ 96%）差异无统计学意义（P > 0.05，单因素方差分析）。X线片上出现的突然的根管狭窄是判断根管多样性的一个很好的标准。
The purpose of this study was to examine the accuracy of radiographic evaluation of root canal multiplicity in mandibular first premolars in vitro. One hundred thirty-nine extracted human mandibular premolars were used. Buccolingual radiographs were taken, and the number of canals in each tooth was determined on radiographs by four dentists using a view box. A sudden narrowing of the main canal was interpreted as a sign of multiple canals. After the radiographic evaluation, the tooth crown was removed. India ink was injected into the root canal system, and the root was cleared to observe the canal morphology. There was no statistically significant difference among the four dentists with respect to the coincidence rate (93%-96%) of the canal number evaluated on radiographs with that identified by cleared teeth observation (p > 0.05, one-way analysis of variance). A sudden narrowing of the main canal on the radiograph was a good criterion to judge root canal multiplicity.