The purpose of this study was to investigate the effect of tissue-conditioners and relining resin monomers on the bending strength of denture base resin.
The specimens, which were treated with tissue-conditioners or relining resin monomers, were kept under the various transverse loads for three days, and the bending strength of the specimens were examined. Three denture base resins, three direct-relining resin monomers and eight tissue-conditioners were used.
The bending strength of the specimens which were relined tissue-conditioner and not applied the transverse load, was not changed statistically. That of PMMA and polysulfone resin (PSF) applied the transverse load was significantly decreased by relining the tissue-conditioner, while that of polyethersulfone resin (PES) was not changed statistically. The specimens of PSF and PES applied the direct-relining resin monomer, were cracked or fractured by only applying the transverse load, while those of PMMA were not changed visually.
It was concluded from results that it is important to consider about denture base resin materials when tissue-conditioners or relining resins were used in clinic.
