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Original article
Glass transition temperature of hard chairside reline materials after post-polymerisation treatments
Article first published online: 25 JUN 2009
DOI: 10.1111/j.1741-2358.2009.00312.x
© 2009 The Gerodontology Society and John Wiley & Sons A/S
Additional Information
How to Cite
Urban, V. M., Machado, A. L., Alves, M. O., Maciel, A. P., Vergani, C. E. and Leite, E. R. (2010), Glass transition temperature of hard chairside reline materials after post-polymerisation treatments. Gerodontology, 27: 230–235. doi: 10.1111/j.1741-2358.2009.00312.x
Publication History
- Issue published online: 23 AUG 2010
- Article first published online: 25 JUN 2009
- Accepted 25 March 2009
- Abstract
- Article
- References
- Cited By
Keywords:
- acrylic resin;
- glass transition temperature;
- differential scanning calorimetry;
- post-polymerisation treatment
doi:10.1111/j.1741-2358.2009.00312.x Glass transition temperature of hard chairside reline materials after post-polymerisation treatments
Objective: This study evaluated the effect of post-polymerisation treatments on the glass transition temperature (Tg) of five hard chairside reline materials (Duraliner II-D, Kooliner-K, New Truliner-N, Ufi Gel hard-U and Tokuso Rebase Fast-T).
Materials and methods: Specimens (10 × 10 × 1 mm) were made following the manufacturers’ instructions and divided into three groups (n = 5). Control group specimens were left untreated. Specimens from the microwave group were irradiated with pre-determined power/time combinations, and specimens from the water-bath group were immersed in hot water at 55°C for 10 min. Glass transition (°C) was performed by differential scanning calorimetry. Data were analysed using anova, followed by post hoc Tukey’s test (α = 0.05).
Results: Both post-polymerisation treatments promoted a significant (p < 0.05) increase in the Tg of reline material K. Materials K, D and N showed the lowest Tg (p < 0.05). No significant difference between T and U specimens was observed.
Conclusion: Post-polymerisation treatments improved the glass transition of material Kooliner, with the effect being more pronounced for microwave irradiation.