Perbedaan efek penambahan hidroksiapatit pada bahan basis gigi tiruan resin akrilik polimerisasi panas terhadap kekuatan impak: Studi eksperimental laboratoris
Abstract
Effect of addition of hydroxyapatite to denture base materials heat cured acrylic resin on impact strength
Introduction: The most commonly used denture base material is heat-cured (HC) acrylic resin, but HC acrylic resin has low impact strength and therefore it breaks easily when dropped. Impact strength can be increased by adding reinforcing materials, one of which is hydroxyapatite (HA). Hydroxyapatite has excellent osteoconductive properties and good biocompatibility. The purpose of this study was to determine the effect of adding 3%, 4%, and 6% hydroxyapatite to the HC acrylic resin denture base material on impact strength. Methods: This was an experimental laboratory with a posttest-only control group design conducted on HC acrylic resin samples, with and without the addition of HA, each measuring 80 mm x 1 0mm x 4mm. The total number of samples was 36, consisting of 9 samples for each group: group A (control), group B (3% HA), group C (4% HA), and group D (6% HA). Impact strength was measured using the Charpy Impact Tester and then calculated using the standard formula. Data were analyzed using one-way ANOVA and the Least Significant Difference (LSD) test. Result: There was an increase in the HC acrylic resin impact strength in the group with the addition of 3% hydroxyapatite compared with the group without hydroxyapatite, as well as compared with the groups containing 4% and 6% hydroxyapatite. The addition of HA had a significant effect on impact strength with p=0.003 (p <0.05). The LSD test showed significant differences in the effect of adding HA on the impact strength of HC acrylic resin between groups A–C (p=0.040, p<0.05), groups A–D (p=0.010, p<0.05), groups B–C (p=0.006, p<0.05), and groups B–D (p=0.001, p<0.05). Conclusion: The addition of 3% HA can increase impact strength, indicating that the resulting HC acrylic resin denture base material is more resistant to fracture.
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DOI: https://doi.org/10.24198/jkg.v37i1.60109
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