The effect of colloidal silica and diamond suspensions on the surface roughness of automatically finished heat-polymerized acrylic resin

The Journal of Prosthetic Dentistry
Stanley C OnwubuShenuka Singh

Abstract

On an acrylic resin denture base, a smooth and highly polished surface is important to maintain oral health and prevent bacterial colonization. It is unclear how best to obtain such a surface. The purpose of this in vitro study was to examine the effect of both colloidal silica and diamond suspension abrasives on the roughness values of polymethyl methacrylate (PMMA) denture base material. Thirty PMMA specimens were fabricated and divided into 3 groups (n=10). Each was automatically polished using a diamond suspension, a colloidal silica suspension, and pumice. The mean roughness value (Ra) after polishing was recorded using a profilometer. An optical electron microscope was further used to evaluate the smoothness of the polished surface. ANOVA was used to analyze the roughness average (Ra) values for all polished specimens. A multicomparison test with Bonferroni correction was used to identify the mean differences among the 3 abrasive materials (α=.05). The Ra values measured for the colloidal silica suspension and pumice were statistically different (P<.001). Equally, statistical differences were observed between the diamond suspension and pumice abrasives (P<.05). No significant differences were found between the diamond and...Continue Reading

Citations

Dec 11, 2021·European Journal of Dentistry·Stanley Chibuzor Onwubu, Phumlane Selby Mdluli

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