細い彎曲根管の根管清掃に関する研究 : 第 1 報規格洗浄針を用いた場合の清掃効果

概要

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Extracted maxillary and mandibular molars with the curved fine root canal untreated were employed. Enlarging and preparation of the root canals were made with K-files after the root canals were filled with distilled water. Then the root canals were given 1-minute irrigation with 2ml of 1.25%-5% NaOCl held in the syringe with a standard needle, and continuously with 1.875%-7.5% EDTA. In another group the same irrigation procedure was used with distilled water. Inner wall surfaces were observed through scanning electron microscope. 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%-5% NaOCl and 3.75%-7.5% EDTA, cleansing effect was sufficient at mid-canal but insufficient at root apex. 3. In order to increase cleansing effect on root canals, abundant use of the irrigation agents and more prolonged time for cleansing appear to be necessary.
九州歯科学会の論文
1988-10-25