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KMID : 1035320190460040205
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Korean Society for Dental Materials
2019 Volume.46 No. 4 p.205 ~ p.214
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Mechanical properties and antibacterial effects of glass ionomer cement containing gallium phosphate glass (GPG)
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Kim Dong-Ae
Kim Gyu-Ri
Lee Jung-Hwan
Lee Hae-Hyoung
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Abstract
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This study investigated the mechanical properties and antibacterial activity of glass ionomer cement (GIC) containing 1 mol%or 5 mol% gallium phosphate glass (GPG) powder. GPG were added to conventional GIC powder in a range of 0~20 wt%.
The specimens for compressive strength (4 mmØ×6 mm) and diametral tensile strength (6 mmØ×4 mm) were prepared bymixing with the cement liquid and kept in an water of 37±1℃. Mechanical properties were evaluated at an interval of 1h, 24 h, and 7 days. Antibacterial activity of specimens against to S. mutans and S. sobrinus was evaluated using agar diffusionmethods. Data were statistically analyzed by one-way ANOVA and Tukey HSD post-hoc test (p<0.05). Diametral tensile strengthof GIC containing GPG were significantly higher than control GIC while compressive strength showed no statistical difference.
There was an increasing tendency of antibacterial activity for GPG-GICs. Results indicated that GPG can be considered as potentialreinforcing agent for increasing antibacterial and mechanical properties for conventional GIC.
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KEYWORD
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Gallium phosphate-based glass (GPG), Glass ionomer cement, Compressive strength, Diametral tensile strength, Antibacterial activity
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