今回も超音波ファイルを用いた根管洗浄法についての

文献です。

.

ヒト抜去歯60本を検索対象として

2.62％次亜塩素酸ナトリウム溶液に超音波ファイルを併用した群と

併用しなかった群に分けて比較しています。

それぞれステップバック法で根管形成しています。

This study compared the effect of the step-back preparation versus a step-back/ultrasound preparation on the tissue removal from the mesial root canals of 60 extracted human mandibular molars. The step-back/ultrasound preparation significantly cleaned isthmuses at both levels and canals at the 1-mm level more effectively than the step-back preparation. Statistical analysis indicated no significant difference, in canal cleanliness at the 3-mm level, between the step-back and the step-back/ ultrasound groups. There were no significant differences demonstrated in isthmus cleaning ability when comparing the step-back group with the control group, at both the 1- and 3-mm levels. At the 1-mm level, operator 1 significantly cleaned canals in the step-back group more effectively than operator 2. However, in the step-back/ultrasound group, no significant differences were demonstrated between operators in their ability to clean canals at this level. In both experimental groups, operator comparisons indicated no significant differences in isthmus cleanliness at the 1-mm level.

つまり

超音波ファイルを併用した群とそうでない群とで

根尖から3mmの部位では有意差はなかったが

イスムスや根尖から1mmの部位では

併用した群で有意に洗浄効果が高かった

ということです。

右上図が超音波ファイルを併用しなかった根管で

右下図が併用した根管になります。

右下図の様な異物の無い綺麗な根管を

頭でイメージしながら

超音波洗浄を行っていきたいと思います。

.

引用文献

Alan Goodman, Al Reader, Mike Beck, Rudy Melfi, William Meyers

An in vitro comparison of the efficacy of the stepback technique versus a step-back/ultrasonic technique in human mandibular molars

Journal of Endodontics Volume 11, Issue 6 , Pages 249-256, June 1985