Studying the properties of heat cure acrylic resin after reinforced with polyamide fibers treated with plasma (oxygen gas)

Background:  In prosthodontic dentistry, Heat cure acrylic resin is the most popular denture base material. This material still requires different methods of reinforcement .One of which can be the addition of different kind of fibers. This study aimed to investigate the effects of different concentrations of plasma treated polyamide fibers on some properties of heat cure acrylic resin. Materials and methods:  All specimens were prepared from heat cure acrylic resin. plasma treated polyamide fibers were added in different concentration as follow (0% no fibers control, 2%, 5% &7%).These fibers were treated with a plasma oxygen gas for two times 5min and 10 min .The properties of these specimens were evaluated through the following test: Transverse strength, Impact strength, Indentation hardness and surface roughness. Statistical analysis of data was done using ANOVA test. Results:  In heat cure acrylic specimens reinforced with plasma treated polyamide fiber for 10 min , the highest mean values of Transverse strength and Impact strength (78.5+3.100)Mpa,( 7.821+0.763)KJ/m2 respectively. These results observed in specimens contain (5%) of fiber. Also, the effect of polyamide fiber treated with oxygen gas for 5 min increases transverse strength and impact strength. ANOVA test results revealed a non-significance difference among groups of specimens for indentation test only. Conclusions:  Within the limitation of this study ,it can be concluded that 2%&5% of plasma treated polyamide fiber results in improvement in transverse strength, impact strength and surface roughness. While for Indentation hardness test, a statistically non significance difference was observed among all groups of specimens.