Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)
- Volume 28 Issue 4
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- Pages.683-693
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- 2001
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- 1226-8496(pISSN)
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- 2288-3819(eISSN)
EFFECTS OF ER:YAG LASER ABLATION ON THE DENTIN
Er:YAG 레이저를 이용한 치아삭제 효과
- Choi, Nam-Ki (Department of Pediatric Dentistry, Dental Science Research Institute, College of Dentistry, Chonnam National University) ;
- Yang, Kyu-Ho (Department of Pediatric Dentistry, Dental Science Research Institute, College of Dentistry, Chonnam National University) ;
- Park, Sang-Won (Department of Prothodontic Dentistry, Dental Science Research Institute, College of Dentistry, Chonnam National University) ;
- Kim, Ok-Joon (Department of Oral Pathology, Dental Science Research Institute, College of Dentistry, Chonnam National University)
- 최남기 (전남대학교 치과대학 소아치과학교실, 치의학 연구소) ;
- 양규호 (전남대학교 치과대학 소아치과학교실, 치의학 연구소) ;
- 박상원 (전남대학교 치과대학 보철과학교실, 치의학 연구소) ;
- 김옥준 (전남대학교 치과대학 구강병리학교실, 치의학 연구소)
- Published : 2001.11.30
Abstract
The purpose of this study was to evaluate the effects of Er:YAG laser on cutting efficacy and its histologic findings. Dentin specimens of human premolars and molars were used and irradiated by Er:YAG laser with noncontact handpiece type delivery system under different treatment condition of irradiation time. Cavity pattern and volume were evaluated to determine the cutting efficacy and following results were obtained. 1. Cutting volume of sound dentin was getting larger with time immersed in water increase 2. With the condition of irradiation (150mJ, 10Hz, 30sec), surface irregularity was more increased in sound dentin comparing to carious dentin. For the light microscopic examination, dentinal tubules were opened and ash flecks and cracks were noted with inconsistence of dentinal tubules. 3. In case of 30 sec. irradiation in carious dentin, dark zone was limited to small focus whereas 1 min. irradiation, more wider, and cracks were noted in the perpendicular to direction of dentinal tubules. For the 2 min. irradiation, cavity was the widest and more cracks were found.
Er:YAG 레이저는 파장이 물의 주흡수 정점과 일치하는