Dental Materials Ch. 11

Question 1

the term used when the denture teeth are set in wax is

a. denture arrangement
b. denture set up
c. articulated set up
d. articulated arrangement

Answer 1

b. denture set up

Question 2

to repair a broken denture, a thin layer is ground off. next, monomer is applied to the surfaces so that

a. some of the set material is dissolved
b. the setting reaction of the repair is accelerated
c. the finishing and polishing of the repair is made easier
d. the color of resin powder does not change

Answer 2

a. some of the set material is dissolved

Question 3

heat activated acrylic resin systems are very similar to chemically activated systems. the major difference is

a. heat-activated systems have much less strength than chemically activated systems
b. more inhibitor is present in the liquid of heat-activated systems
c. chemical activator is present in the liquid of head-activated systems
d. no chemical activator is present in the liquid of heat-activated systems

Answer 3

d. no chemical activator is present in the liquid of heat-activated systems

Question 4

most denture teeth used today are acrylic rather than porcelain. porcelain teeth are softer than acrylic teeth and do not cause excessive wear on natural opposing teeth

a. first is true, second is false
b. first is false, second is true
c. both are true
d. both are false

Answer 4

a. first is true, second is false

Question 5

partial denture frameworks usually include

a. clasps, denture base and connectors
b. teeth, clasps and connectors
c. clasps, connectors and mesh
d. teeth, denture base, connectors and clasps

Answer 5

c. clasps, connectors and mesh

Question 6

cross-linking of acrylic resins will improve the mechanical properties. the most important/beneficial property it would improve would be:

a. resilience
b. toughness
c. fatigue
d. creep

Answer 6

b. toughness

Question 7

mandibular dentures are easier to wear than maxillary. saliva helps to improve the suction needed to hold a denture in place

a. first is true, second is false
b. first is false, second is true
c. both are true
d. both are false

Answer 7

b. first is false, second is true

Question 8

the wax rims used for denture contraction serve to determine the patient’s

a. midline
b. plane of occlusion
c. size of denture teeth
d. all of the above

Answer 8

d. all of the above

Question 9

the acrylic resin of a partial denture is processed the same way as a complete denture except:

a. it takes less time because fewer teeth are involved
b. the finishing and polishing technique is much different
c. the acrylic resin nut flow through and around the mesh of the framework
d. it takes longer because of the design of the framework

Answer 9

c. the acrylic resin nut flow through and around the mesh of the framework

Question 10

Listed below are the steps of constructing a denture. Numbering from 1-10, place the steps in sequential order
____ Casts and rims are mounted on an articulator
____ The master cast and denture setup are embed in stone within the denture flask
____ Acrylic resin is mixed and placed in the mold and the mold is then compressed
____ The patient has the wax try in
____ the mold is created by heating in hot water, the baseplate is removed, the wax is flushed out, and the teeth remain in stone.
____ the baseplate and wax rims are constructed on the master cast
____ the denture is removed from the mold, finished, polished, and disinfected
____ the baseplate and rims are fitted on the patient; midline, plane of occlusion, and bite determined
____ the flask is heated and the resin polymerizes
____ denture teeth are set in wax

Answer 10

3
6
8
5
7
1
10
2
9
4

1. the baseplate and wax rims are constructed on the master cast
2. the baseplate and rims are fitted on the patient; midline, plane of occlusion, and bite determined
3. Casts and rims are mounted on an articulator
4. denture teeth are set in wax
5. The patient has the wax try in
6. The master cast and denture setup are embed in stone within the denture flask
7. the mold is created by heating in hot water, the baseplate is removed, the wax is flushed out, and the teeth remain in stone.
8. Acrylic resin is mixed and placed in the mold and the mold is then compressed
9. the flask is heated and the resin polymerizes
10. the denture is removed from the mold, finished, polished, and disinfected