抄録
The bonding and fracture strengths between denture base materials and rebasing materials were examined in two different models (the standard specimens and the bite plate models). The polysulfone (PSF) and polymethylmethacrylate (PMMA) were used as denture base materials and rebasing materials respectively.
The results were as follows:
1. PSF joined with PMMA well in the tensile tests, and PSF had a higher bonding strength than PMMA.
2. When PSF was used as the rebasing material in the bite plate model, the fracture strength of the bite plate model was increased.
3. When PSF rebased PMMA, the fracture strength of the bite plate model decreased and the mechanical strength of PSF was lost.
4. When the bite plate model rebased PSF at the palate, the crack line was short.
5. The thickness of the bonding surface needed to be at least 1.8 mm, when PSF was used as the rebasing material.
6. In comparison with PMMA, PSF was more effecive in thick models.
