皆さんこんにちは。

今回は再び根管治療になります。

根尖の洗浄を行うに当たり

ニッケルチタンファイルのテーパーと号数から

その効果を比較しています。

The purpose of this study was to evaluate the effect of preparation taper using size #20 or size #40 ProFile GT files on the ability to introduce irrigant and remove debris from root canals. Forty-eight bilaterally matched pairs of extracted teeth were instrumented using.04-,.06-,.08-, and.10-tapered files with one tooth of each pair enlarged to size #20 and the other to size #40. The teeth were sectioned at 1 mm and 3 mm from the apex, and the amount of remaining debris was calculated as a percentage of the total lumen area. The following variables were evaluated: apical preparation size, preparation taper, total volume of irrigation, depth of irrigation needle penetration, and number of instrument changes needed to reach working length. Compared with the size #40 preparations, a significantly greater percentage of remaining debris was observed in the size #20 preparations at the 1-mm level for all tapers except the.10 taper group in which there was no significant difference (p = 0.982). There were no significant differences between any groups at 3 mm. Results suggest that debris is more effectively removed using.04,.06, and.08 ProFile GT instruments when the apical preparation size is larger (size #40) compared with size #20 apical preparations. When a taper of.10 can be produced at the apical extent of the canal, there is no difference in debris removal between the two preparations sizes.

つまり

根尖1mmにおいて0.10未満のテーパーしか付けない場合は

拡大号数を上げた方がより洗浄効果を

高められるということでした。

化学的洗浄を活かす為の機械的拡大方法について

勉強になる文献でした。

引用文献

Albrecht LJ, Baumgartner JC, Marshall JG.

Evaluation of apical debris removal using various sizes and tapers of ProFile GT files.

J Endod.2004 Jun;30(6):425-8.