細い彎曲根管の根管清掃に関する研究 : 第 2 報超音波根管洗浄を行った場合の清掃効果

概要

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Extracted maxillary and mandibular molars with the curved fine root canals untreated were employed. Enlarging and preparation of the root canals were made with K-files after the root canals were filled with distilled water. Two cleansers, NaOCl (1.25%, 2.5%, 5%) and EDTA (1.875%, 3.75%, 7.5%), were used in combination for ultrasonic cleansing and the inner walls of the root canals were observed by SEM. The results were as follows : 1. When the canals were cleansed with water only, or with 1.25% NaOCl and 1.875% EDTA, smeared layer was observed in mid-canal and root apex ; the root canal could not be cleansed sufficiently. 2. When the canals were cleansed with 2.5% NaOCl-3.75%EDTA and 5.0% NaOCl-7.5% EDTA, cleansing effect was sufficient at mid-canal but insufficient at root apex. No significant difference was found between the two. 3. In order to increase cleansing effect on root canals, abundant use of the irrigation agents and extension of time for cleansing appear to be necessary.
九州歯科学会の論文
1988-12-25