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Glass transition temperature of hard chairside reline materials after post‐polymerisation treatments
Author(s) -
Urban Vanessa M.,
Machado Ana L.,
Alves Marinês O.,
Maciel Adeilton P.,
Vergani Carlos E.,
Leite Edson R.
Publication year - 2010
Publication title -
gerodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 54
eISSN - 1741-2358
pISSN - 0734-0664
DOI - 10.1111/j.1741-2358.2009.00312.x
Subject(s) - differential scanning calorimetry , glass transition , polymerization , post hoc , irradiation , medicine , significant difference , nuclear chemistry , microwave irradiation , composite material , dentistry , materials science , microwave , polymer , chemistry , physics , quantum mechanics , nuclear physics , thermodynamics
doi:10.1111/j.1741‐2358.2009.00312.x
Glass transition temperature of hard chairside reline materials after post‐polymerisation treatmentsObjective: This study evaluated the effect of post‐polymerisation treatments on the glass transition temperature ( T g ) 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 T g of reline material K. Materials K, D and N showed the lowest T g ( 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.