Effect of Vinegar-hydrogen Peroxide Mixture on Certain Properties of Pmma: An in-vitro Study

Background: Polymethyl Methacrylate (PMMA) is widely used in dentistry for its biocompatibility, durability, and aesthetic properties. However, maintaining PMMA-based dental appliances requires effective, non-toxic, and eco-friendly cleaning methods. Vinegar and hydrogen peroxide have individually demonstrated antimicrobial properties, but their combined effects on PMMA remain unexplored. Aim: This in vitro study aims to evaluate the effect of a vinegar-hydrogen peroxide mixture on the surface roughness, flexural strength, and impact strength of PMMA. Materials and Methods: A total of 108 PMMA samples were fabricated and divided into three test groups: surface roughness, flexural strength, and impact strength. Each group was further divided into two subgroups—Subgroup A (immersed in a 1:1 vinegar-hydrogen peroxide mixture) and Subgroup B (control, immersed in distilled water). Samples were soaked for 8 hours daily over 5, 10, and 30 days. After immersion, surface roughness was measured using a surface profiler, flexural strength was assessed via a three-point bending test on a universal testing machine, and impact strength was evaluated using an impact testing machine. Statistical analysis was performed using SPSS 26.0, with significance set at p<0.05. Results: The study will determine whether the vinegar-hydrogen peroxide mixture affects the physical properties of PMMA, impacting its clinical longevity and performance. Conclusion: If proven effective and safe, the vinegar-hydrogen peroxide mixture could serve as an affordable, eco-friendly alternative to commercial denture cleansers, offering a viable cleaning solution for denture wearers while maintaining PMMA’s structural integrity.