Abstract
4-Methacryloxyethyl trimelliate anhydrite (4-META) had been reported to be a suitable monomer which promotes adhesiveness of PMMA rods with tooth substrates and dental gold alloys.
Film thickness, tensile adhesive strength and solubility of a new adhesive resin cement including 4-META were measured after cementing full coverage crown on an abutment tooth, and the values were compared with those of zinc phosphate, polycarboxylate, glass ionomer, epoxylite resin, reinforced zinc oxide eugenol cements.
The results were as follows:
1) The film thickness of the adhesive resin cement on the margin was about 75 μm as cast, but it was reduced to 26 μm by adding vent of internal groove.
2) Force required to dislodge crown cemented by the adhesive resin cement was about 100kg.
3) Force required for separation of the cement resin crown-tooth assemblies was about 26kg after adding thermal cycles of 200 times. Dye penetration was to located to the enamel of the margin.
4) Scanning electron microscopy evaluation of the solubility on margins of crowns showed that the adhesive resin cement was tolerable in 1/100N lactic acid solution for 12 hours, although most of cements was decayed remarkably.
