244 641

Cited 0 times in

수종의 NiTi 전동 파일 단면 형태 비교 및 pecking motion의 사용방법이 피로 파절에 미치는 영향

Other Titles
 Compartative study on morphology of cross-section and cyclic fatigue test with different rotary NiTi files and handling methods 
Authors
 김재관  ;  금기연  ;  김의성 
Citation
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지), Vol.31(2) : 96-102, 2006 
Journal Title
Journal of Korean Academy of Operative Dentistry(대한치과보존학회지)
ISSN
 1225-0864 
Issue Date
2006
Keywords
Fatigue fracture ; Cross-sectional area ; Pecking motion ; Pecking distance
Abstract
There are various factors affecting the fracture of NiTi rotary files. This study was performed to evaluate the effect of cross sectional area, pecking motion and pecking distance on the cyclic fatigue fracture of different NiTi files. Five different NiTi $files-Profile^{®}$ (Maillefer, Ballaigue, Switzerland), $ProTaper^{TM}$(Maillefer, Ballaigue, Switzerland), $K3^{®}$ (SybronEndo. Orange, CA) , Hero $642^{®}$ (Micro-mega, Besancon, France), Hero $Shaper^{®}$ (Micro-mega, Besancon, France)-were used. Each file was embedded in temporary resin, sectioned horizontally and observed with scanning electron microscope. The ratio of cross-sectional area to the circumscribed circle was calculated. Special device was fabricated to simulate the cyclic fatigue fracture of NiTi file in the curved canal,. On this device, NiTi files were rotated (300rpm) with different pecking distances (3 mm or 6 mm) and with different motions (static motion or dynamic pecking motion) . Time until fracture occurs was measured. The results demonstrated that cross-sectional area didn’’t have any effect on the time of file fracture. Among the files, $Profile^{®}$ took the longest time to be fractured. Between the pecking motions, dynamic motion took the longer time to be fractured than static motion. There was no significant difference between the pecking distances with dynamic motion, however with static motion, the longer time was taken at 3mm distance. In this study, we could suggest that dynamic pecking motion would lengthen the time for NiTi file to be fractured from cyclic fatigue.
Files in This Item:
T200600045.pdf Download
DOI
10.5395/JKACD.2006.31.2.096
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Eui Seong(김의성) ORCID logo https://orcid.org/0000-0003-2126-4761
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/108794
사서에게 알리기
  feedback

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse

Links