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Background: Repeated fracture of denture base is a common problem in prosthodontics, it represents an annoyance for the clinician. Therefore, the possibility of increasing repairability using new reinforcement materials is of great interest to prosthodontists. Aim of the study: This study aimed to evaluate the effects of incorporation of silver nano-particles on the flexural strength of repaired polymethylmethacrylate (PMMA) and microwave denture bases. Materials and methods: thirty-six specimens of conventional and microwave denture base materials were fabricated (18 for each) and divided into three subgroups according to surface design (Dovetail, 45° bevels and butt joints). Silver nano-particles was added to repair cold cure-acrylic resin powder. A three - point bending test was used to measure flexural strength. The results were analyzed with a P-value of <0.05 being significant. Results: totally it was found that repaired Microwave group recorded statistically non-significant (p>0.05) higher flexure strength mean value. Silver nano-particles modified cold cure repaired subgroup recorded statistically significant (p 0.05). Conclusion: Incorporation of silver nano-particles into the repair resin improved the flexural strength of repaired denture base

EFFECT OF INCORPORATION OF SILVER NANO-PARTICLES ON THE REPAIRABILITY OF CONVENTIONAL AND MICROWAVE DENTURE BASES