Which of the following constituents is common in occlusal sealants, bonding agents, composite resins ? A. BIS GMA B. Polymethyl methacrylate C. Benzoin methyl ether D. Silica filter

The most important disadvantage of acrylic denture base is_______________? A. porosityB. Shrinkage C. Tooth breakage D. Water absorption

Radio opacity to composite resins is rendered by_______________? A. Silica glass B. Organic matrixC. Barium glass and strontium glasses D. Fluoride particles

Acrylic (cold cure)______________? A. Melts at 100°C B. Softens at 100°C C. Still requires heat for polymerizationD. Produces heat during polymerization

Use of dimethyl-P-toluidine is indicated for_______________? A. Thermal polymerization of acrylicB. Chemical polymerization C. Retarding the polymerization reaction D. To inhibit the action of benzoyl peroxide

If curing occurs at temperature more than 100°C porosity results in which area of denture______________? 1. Hard thick central area 2. Thin Palatal area 3. Thin area of flanges 4. Porosity is uniformly distributed

All of the following statements about the differences between self-polymerizing acrylic resins and heat-cured resins are true EXCEPT______________? A. The former have a lower molecular weight B. The former have higher residual monomer content C. The former are more porousD.…