질화티타늄 처리가 니켈-티타늄 전동파일의 피로파절 저항성에 미치는 영향 원문보기
The effect of titanium nitride coating on the fatigue fracture resistance of rotary nickel titanium instruments
황인자, 유연지, 안진수, 정신혜, 금기연, 이윤, 서덕규,
소속 상세정보
황인자 ( Hwang In-Ja ) - 서울대학교 치의학대학원 치의학과
유연지 ( Yoo Yeon-Jee ) - 서울대학교 치의학대학원 치과보존학교실
안진수 ( Ahn Jin-Soo ) - 서울대학교 치의학대학원 치과생체재료과학교실
정신혜 ( Chung Shin-Hye ) - 한양대학교 의과대학 치과학교실
금기연 ( Kum Kee-Yeon ) - 서울대학교 치의학대학원 치과보존학교실
이윤 ( Lee Yun ) - 연세대학교 원주세브란스기독병원 치과보존과
서덕규 ( Seo Deog-Gyu ) - 서울대학교 치의학대학원 치과보존학교실
KMID : 1035320140410010047
Abstract
The purpose of this study was to examine the effect of titanium nitride coating treatment on the cyclic fatigue resistance of two nickel-titanium rotary instruments and to examine the coated surface under a scanning electron microscope (SEM). A total of 48 Nickel-titanium files from two brands (K3, SybronEndo, Orange, CA, #25/.06 taper; Helix, Diadent, Daegu, Korea, #30/.06taper) were tested. The experimental group (12 files from each brand was treated with titanium nitride through physical vapor deposition method. No treatment was done to the control group. A Endo Tester (Denbotix, Bucheon, Gyeonggi-do Korea) that simulated actual canal configuration and pecking motion of files allowed the instruments to rotate freely inside and move up and down along the artificial canal. The time it took for the file to fracture was recorded and was multiplied by the revolution per minute to obtain the number of cycles to failure (NCF). SPSS statistical package was used to analyze the results with Mann-Whitney U test. Four files, randomly selected from each group, were examined using under a SEM to examine the surface characteristics. NCF of K3 files coated with titanium nitride decreased significantly. Helix files showed no difference between the experimental and control groups. The presences of titanium nitride coating were observed under SEM. Titanium nitride treatment didn’t significantly improve the fatigue fracture resistance in NiTi rotary files.
키워드
니켈-티타늄 전동파일; 질화티타늄 물리증착법; 표면처리; 피로파절; 피로파절저항성
cyclic fatigue fracture; fracture resistance; nickel-titanium rotary instrument; surface treatment; titanium nitride
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