| 치과용 열가압 글라스 세라믹스의 기계적 성질과 미세구조 |
| 이해형, 이병택1 |
단국대학교 치과대학 치과생체재료학
1공주대학교 신소재공학부 |
| Mechanical Properties and Microstructure of Dental Heat-Pressable Glass-Ceramics |
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| ABSTRACT |
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Biaxial flexure strength (ball-on-3-ball) and fracture toughness (indentation microfracture) of heat-pressable glass-ceramics for dental use were investigated in this study. Crystal phase and microstructure of glass-ceramics were analyzed by XRD. SEM, and TEM. Crack propagation in specimens was not effectively arrested by dispersed crystalline particles. However, higher degree of crystallization probably contributes to strengthening of glass-ceramics. Better clinical reliability can be expected from lithium disilicate glass-ceramic because of its significantly higher biaxial flexure strength and fracture toughness. |
| Key words:
Dental materials, Glass-ceramics, Heat-pressing, Biaxial strength, Fracture toughness |
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