超音波振動を応用した根管拡大・清掃に関する研究

概要

論文の詳細を見る
Enlarging and cleansing of the root canal is key requirements for successful root canal preparation. The purpose of this study was to evaluate the efficiency of enlarging and cleansing root canal by the ultrasonic energized filing and by conventional hand filing. Extracted human anterior teeth (twenty teeth) with the root canals untreated were prepared by the two methods and the surfaces of the prepared canal walls were examined with the scanning electron microscope. The results were as follows : 1. The working time for the preparation of root canal from #15 K-file to #50 K-file was shorter by the conventional method as compared to the ultrasonic method, and significant differences were found statistically. 2. The surfaces of the canal walls prepared by the conventional method were covered with a smeared layer and the opennings to the dentinal tubules were not observed. 3. Characteristic diagonal wave patterns of grooving were found in the surfaces of the canal walls in the middle area prepared by the ultrasonic method, but surfaces of the canal walls in the middle and apical areas were covered with a smeared layer and the opennings to the dentinal tubules were not observed. 4. There was no difference in the appearance of the root canal walls when these ultrasonic and conventional hand methods were compared. 5. A few inaccesible parts existed in both groups ; therefore, these parts need to be cleansed.
九州歯科学会の論文
1987-06-25