Comparison of some physical properties of acrylic denture base material cured by water bath and microwave techniques
Abstract
This study was designed to evaluate the physical properties (porosity and transverse strength) for microwave cured acrylic resin using new Iraqi micro-wavable flask.For transverse strength test, 20 acrylic samples were prepared with dimensions 65 10 + 0.03 2.5 mm. Ten samples were processed by conventional water bath technique, while the other 10 samples were prepared by microwave technique using new Iraqi microwavable flask. The transverse strength of the acrylic samples were measured by threepoint bending test.For porosity test, 16 acrylic samples were prepared with dimensions 65 55 2.5 mm. Eight acrylic samples were processed by conventional water bath while the other 8 samples were processed by microwave technique using new Iraqi microwavable flask. Evaluation of poro-sity occurrence was done using micro-scope at 20 and 40 magnifications.The results of students ttest showed that there are no significant differences ( p > 0.05) in transverse strength for samples cured by water bath and microwave techniques while microscopical examina-tion revealed that all acrylic samples which cured by both techniques were free from porosities.It was concluded that new Iraqi microwavable flask could be successfully used in curing of acrylic denture base material by microwave technique.
