Some factors affecting the transverse strength of repaired denture acrylic resin.

The aim of this study was to determine the transverse strength of repaired autopolymerising poly(methyl methacrylate) (PMMA) resin. The edge profile (EP) of the repair surface and the powder-to-liquid (PL) ratio of the autopolymerising acrylic resin used for repairs were studied to determine their effects on the transverse strength of rectangular test specimens. Neither the EP nor the PL ratio affected the transverse strength of the test specimens (EP: P = 0.692, PL: P = 0.575). However, the EP significantly affected the type of failure (P < 0.001). The results suggest that autopolymerising PMMA of various PL ratios can be used to repair the fractured pieces of autopolymerising PMMA without affecting the strength of the repair.