| dc.description.abstract | The base material that is commonly used as part of the denture base is acrylic resin. Heat polymerized acrylic resin is the most frequently used type of acrylic resin because it has several advantages such as good color stability, non-irritating, non-toxic, good aesthetic quality, economical low residual monomer, small porosity. Heat polymerized acrylic resin dentures must be disinfected to maintain cleanliness to prevent diseases caused by wearing unclean dentures. Denture disinfection methods can be divided into mechanical, chemical, or combined methods. The chemical method is a good and easiest method to do by immersing the dentures in a disinfecting solution. The immersion will clean the surface of the denture and reach the undercut area of the denture. Chlorhexidine and castor oil are ingredients that have substances that can clean dentures, but the content in these materials has an influence on the properties of dentures, one of which is mechanical properties. In this study the researchers wanted to know the effect of disinfection of chlorhexidine and castor oil based on time of use on the impact strength of heat polymerized acrylic resin denture bases with simulations of 3, 4, and 5 years. The design of this research is laboratory experimental. This research was conducted on heat polymerized acrylic resin samples with bar-shaped samples with a size of 65 x 10 x 2.5 mm for the impact strength test. The total sample used in this study was 45 samples. Each sample was tested using a Charpy Impact Tester to determine the impact strength value and then analyzed by univariant test to determine the mean value and standard deviation, One Way Anova test to determine the effect from desinfection the impact strength of heat polymerized acrylic resin
denture base with 0.2% chlorhexidine and 10% castor oil. Univariant test results showed the impact strength mean value of 10% castor oil was higher than 0.2% chlorhexidine. The results of the One Way Anova test showed that there was a significant effect on the impact strength of disinfection with 0.2% chlorhexidine and 10% castor oil with value p<0,05. the 3 year simulation has a p = 0.030, the 4 year simulation is p = 0.04, and the 5 year simulation is p = 0.0001. The results showed that there was an effect of 10% castor oil on the impact strength of heat polymerized acrylic resin, but the change in impact strength is still above the minimum value so that this material can be suggested as a disinfection material because lower ingredient cost, good biocompatibility, and non toxic effect. | en_US |
