الفهرس | Only 14 pages are availabe for public view |
Abstract This research work was conducted to investigate the effect of curing-techniques and degree of polymerization on the fatigue and impact strength of conventional and modified acrylic resin materials. Materials used this study : 1-Conventional heat-cured acrylic resin Acrostone polymer and monomer. 2-High impact resin (Keystone) polymer and monomer. 3- Metal-filled resin. a) Conventional heat-cured acrylic resin + 5% Aluminum powder added to polymer by volume. b) Conventional heat-cured acrylic resin + 5% Tin powder added to polymer by volume. Methods and procedures The test specimens for each experiment were divided into five groups according to curing teclmiques as the following: Group 1 : Curing in water bath at 73c° for 8 hours (long curing). Group 2 : Curing in water bath at 73+ Ic° for 1.5 hours followed by 1/2 an hour of boiling at 100°c (short curing). Group 3 : Curing in domestic pressure cooker for 12 hour. Group 4 : Curing in microwave oven with fiber glass flask. Group 5 : Curing in microwave oven with flask free. |