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

Autor(es)

Urban, Vanessa M. ^[1] ; Machado, Ana L. ^[2] ; Alves, Marines O. ^[2] ; Maciel, Adeilton P. ^[3] ; Vergani, Carlos E. ^[2] ; Leite, Edson R. ^[3]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: GERODONTOLOGY; v. 27, n. 3, p. 230-235, SEP 2010.
• Citações Web of Science: 6

Resumo

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)

• Processo FAPESP: 02/01405-0 - Análise da temperatura de transição vítrea e peso molecular de resinas acrílicas para reembasamento imediato: efeito de diferentes tratamentos térmicos
• Beneficiário: Carlos Eduardo Vergani
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 02/06919-1 - Analise do efeito de diferentes tratamentos termicos sobre a temperatura de transicao vitrea de resinas acrilicas, por meio de calorimetria exploratoria diferencial.
• Beneficiário: Marines de Oliveira Alves
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica