Kekasaran Permukaan Resin Akrilik Polimerisasi Panas Setelah Aplikasi Pasta Pembersih Berbahan Nano-silika dari Cangkang Kerang Darah (Anadara granosa) 20% dan 30% Berat

Abstract

Physical properties, surface roughness of acrylic resin need to be considered because it is less resistant to abrasion. Cleaning paste can cause surface roughness because it contain abrasive materials. Small abrasive particles produce lower surface roughness. Nano-silica as an abrasive material can be extracted from natural sources, blood clam shells (Anadara granosa). The aim of this research was to determine the difference in surface roughness of heat cured acrylic resin after application of 20% and 30% weight nano-silica cleaning paste from blood clam shells. The sample is heat cured acrylic resin with dimensions of 20x20x2mm. The sample size for this study was 30, divided into three groups: Group I (brushing with toothpaste without nano-silica), Group II (brushing with 20% weight nano-silica toothpaste), and Group III (brushing with 30% weight nano-silica toothpaste). Nano-silica (54nm) was synthesized using the sol-gel method. 1 gram of cleaning paste was brushed on the sample using an electric toothbrush for 18 minutes per day for 10 days with rotational motion. The initial surface roughness was measured, followed by brushing using cleaning paste, then the final surface roughness was measured and the difference was calculated. Surface roughness measurement using a profilometer. The results of this study showed that the mean value and standard deviation in the groups after brushing in groups I, II and III were 0,15 ± 0,02 μm, 0,16 ± 0,02 μm and 0,17 ± 0,02 μm. The results of the Oneway Anova test showed p=0,021 (p<0,05) which showed that there were differences in surface roughness between each brushing group. In this study it can be concluded that there is a difference in the surface roughness of heat cured acrylic resin after application of nano-silica cleaning paste from blood clam shells. The highest surface roughness value of heat cured acrylic resin occurs in 30% weight nano-silica cleaning paste and is safe to use because it produces a surface roughness that does not exceed the ideal limit (0,2 μm).