Effect of polyaramid fiber reinforcement on the strength of 3 denture base polymethyl methacrylate resins
| Autor: | Terry J. Lindquist, Steven A. Aquilino, Hao Foo, Robert L. Schneider, Daniel B. Boyer, Derrick L. Williamson |
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| Rok vydání: | 2001 |
| Předmět: |
Fiber reinforcement
Dental Stress Analysis Denture Bases Materials science Hot Temperature Polymethyl methacrylate Surface Properties Statistics as Topic Acrylic Resins macromolecular substances Dental Materials Materials Testing Humans Polymethyl Methacrylate Composite material Reinforcement Pliability General Dentistry Acrylic resin chemistry.chemical_classification Universal testing machine Analysis of Variance Significant difference technology industry and agriculture Denture Repair Polymer equipment and supplies body regions Nylons chemistry visual_art visual_art.visual_art_medium Denture base Stress Mechanical |
| Zdroj: | Journal of prosthodontics : official journal of the American College of Prosthodontists. 10(3) |
| ISSN: | 1059-941X |
| Popis: | Purpose The interactive effects of synthetic polyaramid reinforcement fibers on the transverse strength of intact and repaired heat-polymerized denture base acrylic resins were investigated. Materials and Methods Three polymethylmethacrylate (PMMA) polymers were tested: Acron MC (GC International Corp, Scottsdale, AZ), Lucitone 199 (Dentsply International Inc, York, PA), and Microlon (The Hygienic Corp, Akron, OH). With each polymer, there were 2 controls and 4 experimental groups (n = 9 per group). The treatment groups were intact heat-polymerized PMMA control, PMMA with unreinforced repair, PMMA with polyaramid reinforced repair, intact polyaramid reinforced heat-polymerized PMMA control, polyaramid reinforced PMMA with unreinforced repair, and polyaramid reinforced PMMA with polyaramid reinforced repair. The transverse fracture strengths of the samples were measured with a 3-point bending test on a Zwick Universal Testing Machine (Zwick of America, Inc, East Windsor, CT). Results The highest mean strength at fracture was recorded with intact polyaramid reinforced heat-polymerized PMMA controls for all resins. Analysis of variance showed significant differences in transverse strength (p < .05) by experimental group, by material, and by interaction of group and material. Tukey HSD (honestly significant difference) Multiple Comparisons Test (α= 0.05) showed that intact polyaramid reinforced heat-polymerized PMMA controls were significantly stronger than intact heat-polymerized PMMA controls and all the other treatment groups. Use of polyaramid reinforcement in repair of unreinforced PMMA or polyaramid reinforced PMMA did not result in significantly increased transverse strength. Conclusions Polyaramid reinforcement significantly increased the transverse strength of intact heat-polymerized PMMA. Polyaramid fibers did not significantly increase strength to reinforce PMMA repairs. |
| Databáze: | OpenAIRE |
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