Comparison between slow-speed handpiece and ultrasonic instrument in retropreparation of root-end in apicectomy
- VernacularTitle:根尖切除术中不同器械对于根尖倒预备的影响
- Author:
Huan WANG
;
Xiaoyu CHU
;
Chengfei ZHANG
- Publication Type:Journal Article
- Keywords:
Scanning electron microscopic;
Ultrasonic instruments;
Retropreparation
- From:
Journal of Practical Stomatology
1996;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of retrograde preparation by using slow-speed handpiece or by ultrasonic tips.Methods:Forty-eight extracted premolars were inspected with Scanning Electron Microscope for the minimum dentine thickness recorded after preparation of root-end cavities by low-speed handpiece and ultrasonic instrument respectively.Results:By using slow-speed handpiece,the minimum dentine thickness recorded after the preparation of root-end cavities was 0.15 mm;whereas that was 0.82 mm and 0.76 mm by ultrasonic instrument with S12 9D and S12 9 respectively(handpiece vs ultrosonic instrument,P
