Ar 레이저를 이용한 치과용 광중합형 복합레진 중합의 효용성
EFFECTIVENESS OF AR-LASER ON POLYMERIZATION OF DENTAL LIGHT-CURED COMPOSITE RESIN
박주석, 장혜숙, 송진, 최용석, 김경남,
소속 상세정보
박주석 ( Park J. S. ) - 연세대학교 치과대학 치과재료학교실
장혜숙 ( Chang H. S. ) - 연세대학교 치과대학 치과재료학교실
송진 ( Song Jin ) - 연세대학교 치과대학 치과재료학교실
최용석 ( Choi Yong-Seog ) - 연세대학교 치과대학 치과재료학교실
김경남 ( Kim Kyoung-Nam ) - 연세대학교 치과대학 치과재료학교실
KMID : 0362219950220020207
Abstract
The object of this study was to evaluate the effectiveness of Ar-laser on the polymerization of dental light-cured composite resins. Materials were cured by Ar-lasers of 0.6W and 0.9W output and visible light for 5, 10 and 20 seconds. Then the diametral tensile strengths of each groups were measured and compared between others. To check the temperature rise due to light irradiation and polymerization heat, thermocouple was inserted into the material during 20 seconds for Ar-laser and 60 seconds for visible light. Following results were obtained.
1. The diametral tensile strength of Ar-laser group of 5 seconds was 34 MPa which was over the minimum strength specified by ADA Spec. No. 27 and significantly different from that of visible light group of 5 seconds, and Ar-laser group of 10 seconds also showed significantly higher strength than that of visible light group of 10 seconds (p<0.05).
2. The difference of diametral tensile strength between Ar-laser group and visible light group of 20 seconds was not significant(p>0.05).
3. The temperature of resin irradiated by visible light reached the highest within 30 seconds from start of irradiation and the average highest temperature range was 48.9-52.6℃.
4. When irradiated by Ar-laser, the resin showed average temperature of 47.8-55.1℃ at 5 seconds and over 60℃ after 10 seconds.
As a results, Ar-laser curing of 5 seconds was thought to be a favorable alternative because it can provide the sufficient strength without significant difference in temperature rise from visible light.
키워드
원문 및 링크아웃 정보
등재저널 정보