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Effect of a post-polymerization treatments on the flexural strength and Vickers hardness of reline and acrylic denture base resins
| Content Provider | Scilit |
|---|---|
| Author | Seo, Rosangela Seiko Vergani, Carlos Eduardo Giampaolo, Eunice Teresinha Pavarina, Ana Claudia Machado, Ana Lucia |
| Copyright Year | 2007 |
| Description | This study evaluated the effect of water-bath and microwave post-polymerization treatments on the flexural strength and Vickers hardness of four autopolymerizing reline resins (Duraliner II-D, Kooliner-K, Tokuso Rebase Fast-TR and Ufi Gel Hard C-UGH) and one heat-polymerized acrylic resin (Lucitone 550-L), processed using two polymerization cycles (short cycle - 90 minutes at 73°C and 100°C for 30 minutes; and long cycle - 9 hours at 71°C). For each material, thirty specimens (64 x 10 x 3.3 mm) were made and divided into 3 groups (n=10). Specimens were tested after: processing (control group); water-bath at 55°C for 10 minutes (reline materials) or 60 minutes (L); and microwave irradiation. Flexural strength tests were performed at a crosshead speed of 5 mm/min using a three-point bending device with a span of 50 mm. The flexural strengths values were calculated in MPa. One fragment of each specimen was submitted to Vickers hardness test. Data were analyzed by 2-way ANOVA followed by Tukey's HSD test (α=0.05). L microwaved specimens (short cycle) exhibited significantly higher flexural strength means than its respective control group (p<0.05). Water-bath promoted a significant increase (p<0.05) in flexural strength of K and L (long cycle). The hardness of the tested materials was not influenced by the post-polymerization treatments. Post-polymerization treatments could be used to improve the flexural strength of some materials tested. |
| Related Links | http://www.scielo.br/pdf/jaos/v15n6/a10v15n6.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327500/pdf |
| Ending Page | 511 |
| Page Count | 6 |
| Starting Page | 506 |
| ISSN | 16787757 |
| e-ISSN | 16787765 |
| DOI | 10.1590/s1678-77572007000600010 |
| Journal | Journal of Applied Oral Science |
| Issue Number | 6 |
| Volume Number | 15 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2007-12-01 |
| Access Restriction | Open |
| Subject Keyword | Journal of Applied Oral Science Acrylic Resins Denture Liners |
| Content Type | Text |
| Resource Type | Article |
| Subject | Dentistry Medicine |
