Keir D M, Senia E S, Montgomery S
Wilford Hall USAF Medical Center, Lackland AFB, TX.
J Endod. 1990 Jul;16(7):323-7. doi: 10.1016/S0099-2399(06)81942-4.
The purpose of this study was to evaluate the effectiveness of a brush in removing debris in the root canal after endodontic instrumentation. Seventeen extracted human maxillary first molars with mesiobuccal canal curvatures of 25 to 35 degrees were divided into two groups. After endodontic access and determination of working length, one group was hand instrumented to a #45 file and the other group to a #35 file at the working length. After the teeth were sectioned at the working length and at 2, 4, and 6 mm from the working length, they were evaluated for debris remaining in the canal space. The specimens were reassembled, brushed with an Endobrush, and reevaluated. The scores for instrumentation alone (controls) and instrumentation plus brushing were compared with paired t tests. Instrumentation with brushing was significantly better than instrumentation alone in debriding the root canal.
本研究的目的是评估一种刷具在根管治疗器械操作后清除根管内碎屑的效果。选取17颗拔除的人类上颌第一磨牙，其近中颊根管弯曲度为25至35度，分为两组。在进行根管入口预备并确定工作长度后，一组在工作长度处用手用器械预备至45号锉，另一组预备至35号锉。在牙齿于工作长度处以及距工作长度2、4和6毫米处进行切割后，评估根管空间内残留的碎屑。将标本重新组装，用Endobrush刷进行刷洗，然后重新评估。采用配对t检验比较单纯器械操作（对照组）和器械操作加刷洗的评分。在清理根管方面，器械操作加刷洗明显优于单纯器械操作。
