G L Polyzois1. 1. Department of Prosthodontics, University of Athens, School of Dentistry, Greece.
Abstract
PURPOSE: This study compared two curing methods (microwave irradiation and dry heat) on the tensile bond strength of silicone facial materials to cured acrylic resin. The facial materials studied were Mollomed, Silskin II, MDX4-4210, and A-2186. MATERIALS AND METHODS: The samples were processed with microwaves for 13 minutes at 90 W plus 2 minutes at 500 W and dry heat for 3 hours at 100 degrees C to cured acrylic resin. Facial materials 3-mm thick were processed between two half-dumbbells of acrylic resin. The bonding surfaces were treated with a primer. The samples were placed in tension until failure. RESULTS: The results showed that the bond strength was affected by the type of silicone material and not by the curing methods used. CONCLUSIONS: Mollomed had the highest bond strength of all materials tested. MDX4-4210 and A-2186 showed the lowest, and Silskin II had intermediate bond strength. Microwave irradiation has the potential of saving time, energy, and resources during the fabrication of facial prostheses, but further laboratory studies and clinical trials are indicated.
PURPOSE: This study compared two curing methods (microwave irradiation and dry heat) on the tensile bond strength of silicone facial materials to cured acrylic resin. The facial materials studied were Mollomed, Silskin II, MDX4-4210, and A-2186. MATERIALS AND METHODS: The samples were processed with microwaves for 13 minutes at 90 W plus 2 minutes at 500 W and dry heat for 3 hours at 100 degrees C to cured acrylic resin. Facial materials 3-mm thick were processed between two half-dumbbells of acrylic resin. The bonding surfaces were treated with a primer. The samples were placed in tension until failure. RESULTS: The results showed that the bond strength was affected by the type of silicone material and not by the curing methods used. CONCLUSIONS: Mollomed had the highest bond strength of all materials tested. MDX4-4210 and A-2186 showed the lowest, and Silskin II had intermediate bond strength. Microwave irradiation has the potential of saving time, energy, and resources during the fabrication of facial prostheses, but further laboratory studies and clinical trials are indicated.