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KMID : 0362419960340010169
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Journal of Korean Academy of Prosthodontics
1996 Volume.34 No. 1 p.169 ~ p.186
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Mechanical properties and biocompatibility with crstallization conditions of CaO-MgO-Al2O3-SiO2-P2O5 bioglass-ceramic syste
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Choi Hyeon-Mi
Lee Min-Ho
Bae Tae-Sung
Park Charn-Woon
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Abstract
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The purpose of this study was to investigate the mechanical properities and biocompatibility with crystallization temperature and time of a bioactive glass-ceramic system 41.4wt%SiO2-35.0wt%CaO-3.0wt%MgO-12.0wt%P2O5-8.6wt%Al2O3 with same molar percent of Al2O3 and P2O5. The crystallization behaviors were investigated with DTA, XRD and SEM. Fracture toughness with the change of crystallization temperature and time was measured by indentation fracture method. Also, biocompatibility was evaluated by culture of mouse fibroblast cell line L929. @ES The results obtained were as follows ; @EN 1. The major crystalline phases were apatite and anorthite, and relative intensity of anorthite phase was increased at 1004℃. 2. The hardness and fracture toughness were gradually increased with the increase in ceraming temperature to 1004℃. 3. When the glass ceramic was heat-treated for 4 hours at ceraming temperature of 1004℃, hardness and fracture toughness showed the maximum values 578.84kg/㎟ and 2.07 MPa·m1/2, respectively. 4. The growth rate and cytotoxic of L929 fibroblast cells for bioactive glass ceramic were better than those of stainless steel and titanium.
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