Effect of fiber‐reinforcement on the strength of polymer materials for provisional restorations: An in vitro study
| Autor: | Stefanos Kourtis, Christina Psarri |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Dental Stress Analysis
Materials science Polymers Surface Properties 0206 medical engineering Glass fiber Young's modulus 02 engineering and technology Bending Composite Resins Dental Materials 03 medical and health sciences symbols.namesake chemistry.chemical_compound 0302 clinical medicine Flexural strength Materials Testing Fiber Composite material Pliability Reinforcement General Dentistry chemistry.chemical_classification technology industry and agriculture 030206 dentistry Polymer Polyethylene 020601 biomedical engineering chemistry symbols Stress Mechanical |
| Zdroj: | Journal of Esthetic and Restorative Dentistry. 32:433-440 |
| ISSN: | 1708-8240 1496-4155 |
| DOI: | 10.1111/jerd.12586 |
| Popis: | Objective The purpose of this study was to evaluate the effect of three different methods of fiber reinforcement (glass fibers preimpregnated, glass fibers nonpreimpregnated, and polyethylene fibers) on the flexural strength and modulus of elasticity of poly-methyl-methacrylate resin (PMMA) and Bis-Gma materials. Materials and methods A total of 60 specimens of autopolymerizing PMMA resin specimens were fabricated using a stainless steel matrix with dimensions of (37.5± 2) × (3 ± 0.1) × (3 ± 0.1) mm according to the standards of ISO 10477. The autopolymerizing resins used in this study were: (a) JET, (b) TRIM, (c) PROTEMP. The fibers used in this study were STICK (Glass fiber preimpregnated), POLYDENTIA (Glass fiber nonpreimpregnated), RIBBOND (Polyethylene fiber). The specimens were tested by three-point bending test and the flexural strength and modulus of elasticity were recorded. The data of each resin type were analyzed by analysis of variance using a significance level of 0.05 to determine the mean differences. Results The integration of reinforcing fibers in the mass of resins for provisional restorations increased both the flexural strength and the modulus of elasticity in all tested combinations compared to control groups. After the three-point bending test, the specimens were not completely fractured and the parts remained together due to the fibers. Conclusions Fiber reinforcement is an effective method to increase mechanical properties of provisional restorative resins. Reinforcement with fibers enhances the flexural strength and the modulus of elasticity of the specimens compared to unreinforced (control) group. Clinical significance The reinforcement of resin materials used for provisional restorations with fibers can increase mechanical strength and may improve the clinical performance and the longevity of provisional restorations during their clinical function. |
| Databáze: | OpenAIRE |
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