各種根管清掃剤使用後の根管内壁面の走査電顕的研究

概要

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Extracted human permanent maxillary anterior teeth with the root canals untreated were used for this experiment. The root canals were enlarged with a K-file with the root canals filled with 10% NaOCl for group one and 15% EDTA for group two. The same canal irrigation method was used for the two groups ; a syringe with an anesthetic needle was filled with 2 ml of 10% NaOCl and the canals were irrigated for three minutes. After drying them with paper point, the canals were irrigated with 2 ml of 15% EDTA by the same method. The canals were dried again with paper point and irrigated with 2 ml of 3% H_2O_2 for three minutes by the same method. The canals were then given final drying with paper point. The inner walls of the root canals were observed under the scanning electron microscope. The results were as follows : 1. In comparison of groups one and two, residue of dentin mud was found at various sites of the root canals and canal irrigation was rather poor. 2. In one of the five cases in each group, rather large masses containing dentin chip and pulp tissue were found in the root apex. 3. The use of an anesthetic needle was inadequate for effective irrigation. 4. Abundant use of EDTA and NaOCl is deemed necessary for effective irrigation.
九州歯科学会の論文
1987-04-25