| Autor: |
Özatk, Şebnem, Alan, Canan Bural |
| Předmět: |
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| Zdroj: |
Journal of Oral Science; Apr2024, Vol. 66 Issue 2, p120-124, 5p |
| Abstrakt: |
Purpose: To evaluate the flexural properties of repaired poly(methylmethacrylate) (PMMA) denture base materials for computer-aided design/computer-aided manufacturing (CAD-CAM) and to compare them with heat-activated polymerized PMMA. Methods: A total of 288 specimens (65 x 10 x 2.5 mm) were prepared using both CAD-CAM and conventional blocks and repaired using auto-polymerizing and visible-light polymerizing (VLC) materials. Microwave energy, water storage and hydroflask polymerization were applied as additional post-polymerization cycles after the repair process. The flexural strength (FS) of the specimens was evaluated using the three-point bending test. Data were evaluated statistically using 2-way ANOVA followed by Bonferroni's correction to determine the significance of differences between the groups (P < 0.05). Results: The FS of the denture base materials for CAD-CAM was significantly higher than that for the heat-activated group (P < 0.05). The FS was significantly highest when microwave energy was used for the post-polymerization cycle. The FS values for all groups repaired with VLC resin were significantly lower than for the autopolymerization group (P < 0.05). Conclusion: The flexural properties of denture base materials for CAD-CAM repaired using autopolymerizing acrylic resins can recover by 50-70%. Additional post-polymerization cycles for autopolymerizing repair resin can be suggested to improve the clinical service properties of repaired dentures. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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