EVALUATION PROPERTIES OF HIGH IMPACT AND MICROWAVE

Adnan Hmeida; Ahmed Algellai; Abdulhakim Elraaid; Abdulsalam Ahmed

المؤلفون

Adnan Hmeida Department of prosthodontics, Faculty of Medical Technology, Mistrate
Ahmed Algellai Department of prosthodontics, Faculty of Medical Technology, Mistrate
Abdulhakim Elraaid Department of prosthodontics, Faculty of Medical Technology, Mistrate
Abdulsalam Ahmed Department of prosthodontics, Faculty of Medical Technology, Mistrate

الكلمات المفتاحية:

Polymethyl، methacrylate، Ivoclar

الملخص

Polymethyl methacrylate is the most widely used material for the construction of denture bases. Attempts have been made to improve the mechanical properties of this material. The purpose of this study was to evaluate some properties of the proprietary material known, commercially, as high impact resins, the microwave cured resin, and to compare them with the conventional heat- cured resins. The results showed that the high- impact denture base materials had higher impact strength, transverse strength, and deflection compared to the conventional and microwave cured resins. The tensile strength, modulus of elasticity were higher in the conventional and microwave cured resins but without statistically significant differences between the groups. Packing plasticity showed the highest values for the SR Ivoclar material (high impact resin), followed by the conventional heat-cured acrylic resins and the microwave cured acrylic resin. Within the high impact resins group, the SR Ivoclar material showed the best results in all properties studied. On the other, hand there was no significant difference between the properties of heat and microwave cured resins. All properties for the different studied materials complied with the ADA specification for the denture base polymers.

المراجع

The denture base materials ranked commercially as high impact strength materials shows superior properties when compared with the microwave curing resin and conventionally heat cured resin regarding impact, transverse strength and deflection properties.

The tensile strength, modulus of elasticity, and packing plasticity, except for the SR Ivoclar, were higher in the conventional and microwave cured resins (statistically non-significant).

The SR Ivoclar material shows the best results in all properties studied compared with the other high impact resins. On the other hand, there was no significant difference between the properties of heat and microwave cured resins.

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