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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Glass transition temperature of hard chairside reline materials after post-polymerisation treatments

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Author(s):
Urban, Vanessa M. [1] ; Machado, Ana L. [2] ; Alves, Marines O. [2] ; Maciel, Adeilton P. [3] ; Vergani, Carlos E. [2] ; Leite, Edson R. [3]
Total Authors: 6
Affiliation:
[1] Ponta Grossa State Univ UEPG, Dept Dent, Ponta Grossa, PR - Brazil
[2] Sao Paulo State Univ UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, Araraquara, SP - Brazil
[3] Sao Carlos Fed Univ UFSCar, Interdisciplinary Lab Eletrochem & Ceram, Dept Chem, Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: GERODONTOLOGY; v. 27, n. 3, p. 230-235, SEP 2010.
Web of Science Citations: 6
Abstract

Objective: 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 x 10 x 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 degrees C for 10 min. Glass transition (degrees C) was performed by differential scanning calorimetry. Data were analysed using anova, followed by post hoc Tukey's test (alpha = 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. (AU)