根管清掃効果に及ぼす超音波振動の影響に関する走査電顕的観察 : 根中央部と根尖部との比較

概要

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The purpose of this study was to evaluate the efficiency in removing the smeared layer by the use of ultrasonic vibration and some irrigating solution. With use of extracted human maxillary anterior teeth with their root canal untreated, enlarging and preparation of the root canals were done with K-files after the root canals were filled with 10% NaOCl, and then the root canals were cleansed by one of the following methods : (1) the root canals were filled with 10% NaOCl and ultrasonic vibration was applied for 2 minutes ; (2) the root canals were treated by the same method as in "1" and then the root canals were filled with 15% EDTA and ultrasonic vibration was applied for 2 minutes. The results were as follows : 1. It was impossible to remove the smeared layer by enlarging and preparation of the root canals only with K-files after the root canals were filled with 10% NaOCl. 2. Ultrasonic vibration with 10% NaOCl was a little effective in dissolving the smeared layer in the middle areas of the root canals. However, it was not effective in the apical areas. 3. Ultrasonic vibration with 15% EDTA was very effective in dissolving the smeared layer in the middle areas of the root canals. However, it was not effective in the apical areas. 4. In order to increase cleaning effect in the apical areas of root canals, abundant use of EDTA and NaOCl appears to be necessary.
九州歯科学会の論文
1987-08-25