구강회복응용과학지 (Journal of Dental Rehabilitation and Applied Science)
- 제17권3호
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- Pages.199-204
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- 2001
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- 2384-4353(pISSN)
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- 2384-4272(eISSN)
지르코니아 강화형 Glass-Ceramic의 기계적 성질
Mechanical Properties of Zirconia Reinforced Glass-Ceramic
- 박은의 (원광대학교 치과대학 치과보철학교실) ;
- 동진근 (원광대학교 치과대학 치과보철학교실) ;
- 이해형 (원광대학교 치과대학 치과생체재료학교실) ;
- 송기창 (건양대학교 공과대학 화학공학교실) ;
- 오상천 (원광대학교 치과대학 치과보철학교실)
- Park, Eun-Eui (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
- Dong, Jin-Keun (Department of Prosthodontics, College of Dentistry, Wonkwang University) ;
- Lee, Hae-Hyoung (Department of Dental Biomaterials, College of Dentistry, Wonkwang University) ;
- Song, Ki-Chang (Department of Chemical Engineering, Engineering College, Konyang University) ;
- Oh, Sang-Chun (Department of Prosthodontics, College of Dentistry, Wonkwang University)
- 발행 : 2001.09.30
초록
This study was to investigate the reused possibility of zirconia reinforced glass-ceramic(IPS Empress Cosmo ceramic) with sprue button in the flexure strength and fracture toughness. 40 disk-shaped ceramic specimens (20 specimens: as-pressed material; 20 specimens: reused material) with approximately 1.7 mm thickness and 15 mm diameter were prepared by "lost wax" technique. The remnants(sprue buttons) were used for repressing. The surface treatments for the discs were gradually abraded with 320, 800, 1200, and 2000 grit SiC sandpaper. The specimens were evaluated their flexure strength with the biaxial flexure jig(ball-on-three balls) and their fracture toughness with Vickers Indentation-microfracture test. The Weibull moduli were calculated for biaxial flexural strength. The mean flexure strength and fracture toughness of each group were
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