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level: DENTURE BASE

Questions and Answers List

level questions: DENTURE BASE

QuestionAnswer
DENTURE BASE materialPMMA (Polymethyl Metacrylate)
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Heat-Activated PMMA): Powderprepolymerized spheres of PMMA
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Heat-Activated PMMA): Initiatorbenzoyl peroxide (0.5%)
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Heat-Activated PMMA): Liquidmethyl methacrylate monomer
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Heat-Activated PMMA): Inhibitorhydroquinone (traces)
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Heat-Activated PMMA): Cross-linking agentethylene glycol dimethacrylate (NIO%)
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Heat-Activated PMMA): activatorheat
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Chemically activated PMMA): ActivatorNN-dimethyl-p-toluidine
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Light-Activated Resins): Matrixurethane dimethacrylate and microfine silica
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Light-Activated Resins): filleracrylic resin beads
CHEMICAL COMPOSITION OF DENTURE BASE RESINS (Light-Activated Resins): photoinitiatorcamphoroquine-amine
MODIFIED ACRYLIC RESINS:Improved flexural, tensile, and impact strengths, as well as fatigue resistanceRubber Reinforced
MODIFIED ACRYLIC RESINS:Consists of interpenetrating network (IPN) of rubber and PMMARubber Reinforced
MODIFIED ACRYLIC RESINS:Reduced stiffness/rigidityRubber Reinforced
MODIFIED ACRYLIC RESINS:High impact and flexural strengthCarbon or Kevlar Reinforced
MODIFIED ACRYLIC RESINS:Good fatigue resistance; High stiffnessCarbon or Kevlar Reinforced
MODIFIED ACRYLIC RESINS:Inferior surface finish;Poor estheticsCarbon or Kevlar Reinforced
ratio of heat activated PMMA3 is to 1
Heat Activated PMMA stages: first stageWet, sandlike stage
Heat Activated PMMA stages: as the polymer dissolves in the monomerTacky fibrous stage
Heat Activated PMMA stages: suitable for packing into a moldSmooth, doughlike stage
Heat Activated PMMA stages: not packable anymore; sir ana, marami na bubbles, porosities and di na maccompress.Stiff, rubberlike stage
avoid gaseos porosity which can be seen on the thickest part which includesdistolingual area of Mn, buccal shelf, palate, tuberosity
Gaseous porosity is caused byrapid evaporation of monomer
Chemically Activated PMMA: CURING TIME30 — 45 mins
Microwave activated PMMA: CURING TIME3 mins
VLC activated Acrylic: CURING TIME10 mins
POLYMERIZATION:Absorbs water through diffusion — linear expansionHeat Activated PMMA
POLYMERIZATION:Dries outHeat Activated PMMA
POLYMERIZATION:Low thermal conductivityHeat Activated PMMA
POLYMERIZATION:CreepHeat Activated PMMA
POLYMERIZATION:Chemically bonds with acrylic ponticsHeat Activated PMMA
POLYMERIZATION:Biocompatible **** few cases of allergic reaction.Heat Activated PMMA
POLYMERIZATION:Cold —curing; Self-curingChemically Activated PMMA
POLYMERIZATION:Auto polymerizing (it’s only shrinkage)Chemically Activated PMMA
POLYMERIZATION:High residual monomer content (3-5%)Chemically Activated PMMA
POLYMERIZATION:Higher solubilityChemically Activated PMMA
POLYMERIZATION:Higher creepChemically Activated PMMA
POLYMERIZATION:Lower color stabilityChemically Activated PMMA
POLYMERIZATION:Less biocompatibleChemically Activated PMMA
POLYMERIZATION:Less shrinkage (MORE STABLE)Chemically Activated PMMA
POLYMERIZATION:Uses glass fiber—reinforced plastic flaskMicrowave activated PMMA
POLYMERIZATION:Same properties with HA PMMAMicrowave activated PMMA
POLYMERIZATION:Higher dimensional stability than HA PMMAMicrowave activated PMMA
POLYMERIZATION:Contains no methacrylate monomerVLC activated Acrylic
POLYMERIZATION:No monomerVLC activated Acrylic