皆さん、こんにちは。
今回は、今まで注目してきたヒポクロ（濃度1.25％）と根管貼薬がどの位有効なのかを示した論文です。
The purpose of this study was to evaluate the extent of bacterial reduction with nickel-titanium rotary instrumentation and 1.25% NaOCl irrigation. Also, the additional antibacterial effect of calcium hydroxide for >1 wk was tested. （中略）
There was a significantly greater pattern of reduction of bacteria when NaOCl was used as an irrigant, compared with sterile saline (p < 0.05). After instrumentation with NaOCl irrigation, 61.9% of canals were rendered bacteria-free. The placement of calcium hydroxide for at least 1 wk rendered 92.5% of the canals bacteria free. This was a significant reduction, compared with NaOCl irrigation alone (p = 0.0001).
The results of this study indicate that NaOCl irrigation with rotary instrumentation is an important step in the reduction of canal bacteria during endodontic treatment. However this method could not consistently render canals bacteria-free. The addition of calcium hydroxide intracanal medication should be used to more predictably attain this goal.
根管内の細菌数0を達成した割合は、 機械的拡大とヒポクロ洗浄後では61.9％、さらに1週間水酸化ナトリウムで根管貼薬した場合は92.5％だったということです。
ヒポクロ以外に水酸化カルシウムによる根管貼薬も
根管内の細菌数を減らす為には欠かせないことが分かりました。
引用文献：Shuping GB, Orstavik D, Sigurdsson A, Trope M.
Reduction of intracanal bacteria using nickel-titanium rotary instrumentation and various medications.
J Endod. 2000 Dec;26(12):751-755.