a methacrylate b ethylmethacrylate c metyl ethyl methacrylate d polymethylmethacrylate 2If curing occurs at temperature more than 100 degree celsius porosity results in which are of denture ID: 1015778
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1. MCQ DENTURE BASE RESIN
2. 1) In heat cure denture base resins the monomer is a) methacrylate b) ethylmethacrylatec) metyl ethyl methacrylated) polymethylmethacrylate
3. 2)If curing occurs at temperature more than 100 degree celsius porosity results in which are of denturea)hard thick central areab) thin palatal areac)thin area of flangesd) porosity is uniformly distributed
4. 3)What is the shrinkage if 3:1 powder:liquid ratio is useda) 6%b) 8%c) 10%d) 21%
5. 4) Hydroquinone is added to methyl methacrylate monomer a) to prevent polymerization during storageb)to initiate release of free radiclesc) to enable polymerisation reaction at room temperatured)all of the above
6. 5) cross linking of denture base is contributed by a)gylcol dimethacrylateb) benzoyl peroxidec) N para toluidine d) methyl methacrylate
7. 6) use of dimethyl P toluidine is indicated fora) thermal polymerization of acrylicb) chemical polymerizationc) retarding the polymerizing reactiond) to inhibit the action of benzoyl peroxide
8. 7)Porosity present in acrylic denture is usually the result of a) prolonged curing cycleb) lack of sufficient pressure applied to flaskc) insufficient acrylic resin monomerd) prolonged bench cooling after curing
9. 8)The most important disadvantage of acrylic denture base isa) porosityb)shrinkagec)tooth breakaged)water absorption
10. 9)In self cure acrylic resin the activator isa) toluidineb) quaternary ammonium compoundc) benzoyl peroxided) tertiary amine
11. 10) Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixturea) excessive expansionb) low impact strengthc) excessive shrinkaged) excessive brittleness