치아염소산나트륨 처리와 멸균법이 근관 치료용 파일의 부식에 미치는 영향에 관한 연구
The effect of NaCOl treatment and sterilization procedures on the corrosion of endodontic files
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초록
근관 치료시 많이 사용되고 있는 K-flex S-S 파일 (Maillefer, USA) 과 Profile Ni-Ti 파일 (Maillefer, USA), K-3 Ni-Ti 파일 (SybronEndo, USA) 의 부식 정도를 보기 위하여 총 360개의 20번 file을 1)멸균소독 방법 (고압가열멸균소독, E-O gas 소독), 2)근관세척액 (5,25% 차아염소산나트륨, 생리식염수), 3)멸균소독 횟수 (1,5,10회) 에 따라 36개 실험군으로 나누었다. 각각의 파일을 각 군별로 처리한 뒤, 세 명의 검사자가 광학 현미경 하에서 25배의 배율로 검사하여 0; 부식 없음, 1; 경도의 부식, 2; 중등도의 부식, 3; 심한 부식으로 점수화 하였다. 심한 부식을 보이는 파일의 표면은 SEM으로 관찰하였고 Kruskal-Wallis test (p<0.05)를 이용하여 통계 분석 처리하여 차아염소산나트륨 접촉 여부와 멸균소독 방법의 차이에 의한 부식 정도를 평가하였다. 그 결과 고압가열멸균소독을 10회 시행한 파일은 통계적으로 유의한 차이를 보여 부식 정도가 심하였고, 1회나 5회 고압가열멸균소독을 시행한 파일과 E-O 가스로 소독한 파일들은 부식의 정도가 경미하여 통계적으로 유의하지 않았다. 차아염소산나트륨 접촉 여부와 제조사 혹은 파일 재료에 따른 유의성 있는 차이는 없었다
Abstract
A variety files made of stainless steel (S-S) or nickel-titanium (Ni-Ti) are used during endodontic treatment. The purpose of this study was to evaluate the corrosion susceptibility of S-S and Ni-Ti endodontic files. Three brands of files were used for this study: K-flex S-S files (Maillefer, USA), Profile Ni-Ti files (Maillefer, USA), K-3 Ni-Ti files (SybronEndo, USA). 120 files of each brands (21㎜, ISO size #20) were divided into 12 groups according to 1) sterilization methods using Autoclave or Ethylene Oxide (E-O) gas, 2) Irrigation solutions using 5.25 % NaOCl or Saline, 3) the number of sterilization (1, 5, 10 times). After above procedures, each of the files was inspected by three examiners with a light microscope and camera at X25. Each file was judged and ranked according to the following criteria: 0; no corrosion, 1; mild corrosion, 2; moderate corrosion, and 3; severe corrosion. The files of high score were examined under the Scanning Electron Microscope. Data were statistically analyzed with the Kruskal-Wallis test (p<0.05). Most of the ten time-autoclaved files had showed mild to moderate corrosion. But, one or five time-autoclaved files did not show corrosive surface. NaOCl treatment and E-O gas sterilization did not influence on corrosion. There was a significant difference in corrosion susceptibility between sterilization methods and the number of autoclaving. However, there was no significant difference between brands and file materials.
참고문헌 (2)
- "An initial investigation of the bending and torsional properties of nitinol root canal files Porous titanium-nickel for Intervertebral fusion in a sheep model Effect to sterilization on cyclic fatigue of rotary nickel-titanium endodontic instruments Microsopic evaluation of three endodontic files pre- and postinstrumentation Corrosion in stainless-steel and nickel titanium files Effects of sterilization and irrigants on the cutting ability of stainless steel files Cutting efficiency of nickel-titanium endodontic instruments and the effect of sodium hypochlorite treatment Effects of sodium hypochlorite on nickel-titanium Lightspeed instruments Mechanical properties of nickel-titanium endodontic instruments and the effect of sodium hypochlorite treatment The chloride corrosion behaviour of four orthodontic wires The sterilization of endodontic hand files Sterilization or disinfection of dental instruments In", pp.690 346 64 121 843 461 17 93 736 290 731 121 321~692 351 129 847 464 20 96 739 294 735 128 322 150 61
- "An initial investigation of the bending and torsional properties of nitinol root canal files Porous titanium-nickel for Intervertebral fusion in a sheep model Effect to sterilization on cyclic fatigue of rotary nickel-titanium endodontic instruments Microsopic evaluation of three endodontic files pre- and postinstrumentation Corrosion in stainless-steel and nickel titanium files Effects of sterilization and irrigants on the cutting ability of stainless steel files Cutting efficiency of nickel-titanium endodontic instruments and the effect of sodium hypochlorite treatment Effects of sodium hypochlorite on nickel-titanium Lightspeed instruments Mechanical properties of nickel-titanium endodontic instruments and the effect of sodium hypochlorite treatment The chloride corrosion behaviour of four orthodontic wires The sterilization of endodontic hand files Sterilization or disinfection of dental instruments In", pp.690 346 64 121 843 461 17 93 736 290 731 121 321~692 351 129 847 464 20 96 739 294 735 128 322 150 61