Yoshioka Takatomo, Villegas Juan C, Kobayashi Chihiro, Suda Hideaki
Graduate School, Tokyo Medical and Dental University, Japan.
J Endod. 2004 Feb;30(2):73-4. doi: 10.1097/00004770-200402000-00002.
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.
本研究的目的是在体外检查下颌第一前磨牙根管多根情况的影像学评估准确性。使用了139颗拔除的人类下颌前磨牙。拍摄颊舌向X线片，由四位牙医通过观片箱确定每颗牙齿X线片上的根管数量。主根管的突然变窄被解释为多根管的标志。在影像学评估后，去除牙冠。将印度墨汁注入根管系统，并清理牙根以观察根管形态。在通过X线片评估的根管数量与通过清理后的牙齿观察确定的根管数量的符合率（93%-96%）方面，四位牙医之间没有统计学上的显著差异（p>0.05，单因素方差分析）。X线片上主根管的突然变窄是判断根管多根情况的良好标准。
