Kittituch VongvachvasinSroisiri ThaweboonPornkiat ChurnjitapiromSaowaros KaophunNatdhanai ChotprasertMahidol University2019-08-232019-08-232018-01-01Key Engineering Materials. Vol.773 KEM, (2018), 338-343101398262-s2.0-85052726553https://repository.li.mahidol.ac.th/handle/20.500.14594/45842© 2018 Trans Tech Publications, Switzerland. Long-term use of a denture base can be a reservoir of microbes due to porosities and mechanical wear of denture surfaces. Vanillin has an antimicrobial effect. However, its influence on physical properties after incorporated in PMMA has not yet been evaluated. The purpose of this study was to investigate physical properties of PMMA by incorporating vanillin in different concentrations. Material and method. There were three groups of PMMA with ten specimens per group. Flexural strength and flexural modulus were tested by using a 3-point bending machine, and surface hardness was determined by Vickers hardness test. One-way ANOVA and Kruskal Wallis tests were used to analyze all data at 0.05 significance level. Result. The 0.1% vanillin group yielded a significant difference in Vickers hardness number (17.15 HV) as compared to 0.5% vanillin group (16.30 HV) and without vanillin (15.30 HV). In contrast, the flexural strength and modulus showed no significant difference among test groups upon incorporation of vanillin. Conclusion. The vanillin incorporated PMMA group demonstrated higher surface hardness, compared to the group without vanillin. In addition, there were no significant differences in flexural strength and flexural modulus among the three groups. This study also found no adverse effect in physical properties of the vanillin incorporated PMMA.Mahidol UniversityEngineeringMaterials ScienceConference PaperSCOPUS10.4028/www.scientific.net/KEM.773.338