Abstract
The stability of a dental alloy surface treated with adhesive monomer by electrodeposition was evaluated. Type 4 gold alloy and cobalt-chromium alloy polished to a flat surface (Ra（0.1μm) were treated with 4-methacryloyloxyethyl trimellitate (4-MET) solution by electrodeposition. The treated alloys were stored under two different conditions (12% or 50% RH) for 1 hour, 1, 5, 15, and 30 days. The stability of the treated surfaces was evaluated by assessing the shear bond strength between the alloys and self-curing methacrylate resin, and IR spectroscopic analysis. The stability of the type 4 gold alloy surface was maintained during 1-day storage in the 12% RH condition. The stability of the cobalt-chromium alloy surface was maintained during 30-day storage in the 12% RH condition, and also maintained during 5-day storage in the 50% RH condition. The 12% RH storage condition was more effective for maintaining the stability of treated alloy surfaces than the 50% RH condition.
