| A | B |
|---|
| Polymer | long chain of identical monomers |
| copolymers | long chain of different polymers |
| copolymers | used in dentures to make them soft |
| cross-linking polymers | improves the final products |
| two structures of polymers | cross-linking/amorphous |
| three stages of polymerization | initial, propagation, termination |
| what is the effect of a denture if left on the nightstand overnight | it will lose water and shrink |
| how does a heat processed denture differs from a chemical cured denture | it is stronger, less porous, |
| condensation polymerization | produces a by- product |
| addition polymerization | most common form of polymerization |
| Poly(Methyl Methacrylate(PMMA) | is common used in denture fabrication |
| Porosity | holes or voids in a denture cause during polymerization |
| Prosthesis | a device used for the replacement of missing tissues |
| Long-term soft liner | used in patients who have problems with hard acrylic denture bases last 1-3 years |
| Short -term-soft liner | last from a few days to a few weeks |
| a What will happen to a partial denture framework if soaked in a chlorine containing cleaner | the metal will darken and corrode |
| The effect that porosity has on acrylic denture contributes to | staining, growth of microorganisms, weakens the acrylic |
| The purpose of the pressure pot during polymeization of a chemical -cured acrylic dresin | increase strength, decrease porosity, decrease shrinkage |
| which type of hard liner has the best physical properties | laboratory heat-cured liner |
| Methyl methacrylate | is the liquid monomer |
| dentures can be made soft and pliable by | adding plasticizers |
| long term soft liners are indicated when | chronic soreness, severe soft tissue undercuts, sharp, knife-edge ridge |
| short term soft liners | are also called tissue conditioner |
| over the counter denture liners have the following shortcomings | may not reestablish proper occlusion, generally porous, promote growth fo yeasts |
| How do you care for dentures | store dentures in water to prevent warping, clean dentrues over sink filled with towel, abrasive cleaners should not be used |
| The following can have an adverse effect on soft denture liners | some effervescent commerical denture soaks, mouthwash containing alcohol, hot water |
