Resumo

BARNARD, RG; CLARKE-FARR, PC  e  LATIEF, Abduraghman. Impact of surface treatments on the sorption and solubility of a heat-cured denture base material. S. Afr. dent. j. [online]. 2023, vol.78, n.9, pp.457-462. ISSN 0375-1562.  https://doi.org/10.17159/sadj.v78i09.15726.

INTRODUCTION: Removable dentures fabricated from polymethylmethacrylate material are the most common prostheses used to treat edentulism worldwide. Aims and Objectives: This research aimed to compare the sorption and solubility characteristics of a mechanically polished heat-cured acrylic denture material and a light-cured varnished material against non-treated material, all of which were soaked in distilled water. METHODS: A total of 45 specimens were prepared and tested according to the ISO Standard 20795-1: 2013 (E) to test for sorption and solubility. The data were analysed through one-way analysis of variance (ANOVA) and Tukey-Kramer multiple comparison test RESULTS AND CONCLUSIONS: The results indicated that both surface treatments were successful in reducing either the sorption or solubility level recorded by the specimens. The control group recorded mean sorption and solubility values which were both within the parameters set out by ISO 20795-1: 2013 (E) for a type-one polymer. Mechanical polishing was identified as the surface treatment that resulted in the largest reduction of solubility, with the lowest sorption values being recorded after the application of the light-cure varnish to the heat-cure denture base material. When mechanical polishing is compared to Optiglaze™ light-cured varnish, the results indicate that mechanical polishing may be a more effective surface treatment option.

Palavras-chave : Heat-cured; Light-cured Varnish; Solubility; Sorption; Surface Treatment; Polymethylmethacrylate.

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