Comparative Effect of Glass Fiber and Nano‐Filler Addition on Denture Repair Strength
| Autor: | Ahmad M. Al-Thobity, Danah F. Almaskin, Nadim Z. Baba, Masoumah S. Qaw, Mohammed M. Gad, Zahra A. AlZaher, Fahad A. Al-Harbi, Tahani H. Abushowmi, Reem Abualsaud, Sultan Akhtar |
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| Rok vydání: | 2019 |
| Předmět: |
Denture Bases
Materials science 0206 medical engineering Glass fiber Charpy impact test 02 engineering and technology Bending 03 medical and health sciences 0302 clinical medicine Flexural strength Materials Testing Denture Repair Composite material Pliability General Dentistry Acrylic resin technology industry and agriculture Izod impact strength test 030206 dentistry Silicon Dioxide 020601 biomedical engineering visual_art visual_art.visual_art_medium Tukey's range test Glass |
| Zdroj: | Journal of Prosthodontics. 29:261-268 |
| ISSN: | 1532-849X 1059-941X |
| DOI: | 10.1111/jopr.13124 |
| Popis: | PURPOSE To evaluate and compare the effects of glass fiber (GF), Zirconium oxide nanoparticles (nano-ZrO2 ), and silicon dioxide nanoparticles (nano-SiO2 ) addition on the flexural strength and impact strength of repaired denture base material. MATERIALS AND METHODS Heat-polymerized acrylic resin specimens were fabricated. All specimens were sectioned centrally and beveled creating 2.5 mm repair gap except for 10 controls. Specimen grouping (n = 10/group) was done according to filler concentration of 0%, 0.25%, 0.5%, and 0.75% of auto-polymerized acrylic powder. Modified resin was mixed, packed in the repair gap, polymerized, finished and polished. Three-point bending test and Charpy type impact testing were done. Data were analyzed using one-way-ANOVA and Post-Hoc Tukey test (α = 0.05). RESULTS All additives significantly increased flexural strength and impact strength (p < 0.05). Within the modified subgroups, no significant differences were found for GF. Significant increase for nano-ZrO2 and significant decrease for nano-SiO2 as the concentration of additive increased were noted for both flexural strength and impact strength. Highest flexural strength was found with 0.75%-nano-ZrO2 (69.59 ± 2.52MPa) and the lowest was found with 0.75%-nano-SiO2 (53.82 ± 3.10MPa). The 0.25%-nano-SiO2 showed the highest impact strength value (2.54 ± 0.21 kJ/m2 ) while the lowest impact strength value was seen with 0.75%-nano-SiO2 (1.54 ± 0.17 kJ/m2 ). CONCLUSION Nano-filler effect was concentration dependent and its addition to repair resin increased the flexural and impact strengths. The incorporation of 0.75%-ZrO2 or 0.25%-SiO2 into repair resin proved to be a promising technique to enhance repair strength and avoid repeated fractures. |
| Databáze: | OpenAIRE |
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