PURPOSE:To evaluate the effect of 5 kinds of irrigant combinations on cleaning of anterior straight root canal walls.

目的：比较5种冲洗剂组合对前牙直根管的清洁效果。

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METHODS: 25 extracted human maxillary anterior teeth, with a single straight root were randomly divided into 5 groups. They were instrumented with K-files and conventional preparation technique.

方法：25颗离体直根管前牙，随机分为5组，不锈钢K锉常规法预备根管，应用5种冲洗剂组合进行冲洗。

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Study Design. This study is aimed to investigate the changes of nerve root functions during the straight leg raising (SLR) test in vivo.

研究设计：研究目的是在活体观察直腿抬高过程中神经根功能的变化。

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My younger brother James, fully appreciating the momentousness of the occasion, came straight from a root canal to join us.

WSJ: At 88, a World Full of Wonders