Chapter 12

Question 1

The most important effect of occlusal vertical dimension on tooth (implant) loading is:

a) potential implant number and size
b) potential implant position
c) potential implant angulation
d) effect on biomechanics of anterior guidance

Answer 1

d) effect on biomechanics of anterior guidance

Question 2

The cantilever effect on a resorbed maxilla is not accommodated for in the treatment plan by:

a) increased implant size
b) increased implant number
c) implant surface coating
d) A-P implant position

Answer 2

c) implant surface coating

Question 3

The ideal crown height space for a FP-1 fixed implant prosthesis should range from:

a) 4-8mm
b) 6-10mm
c) 8-12mm
d) 10-14mm

Answer 3

c) 8-12mm

Question 4

The crown height space for removable prosthesis is:

a) greater than 12mm
b) less than 12mm
c) greater than 10mm
d) greater than 14mm

Answer 4

a) greater than 12mm

Question 5

What is the ideal cantilever length of a prosthesis when stress factors are low and areas factors
are high?

a) 4.0 times the A-P distance
b) 3.5 times the A-P distance
c) 3.0 times the A-P distance
d) 2.5 times the A-P distance

Answer 5

d) 2.5 times the A-P distance

Question 6

Which is the correct order of treatment options if there is inadequate bone volume adjacent to a tooth?

a) 1) graft if width inadequate
2) cantilever a pontic from two or more natural teeth to two or moreDivision A implants
3) fabricate a fixed prosthesis with one pontic connecting an implant with one or two teeth

b) 1) fabricate a fixed prosthesis with one pontic connecting an implant with one or two teeth
2) graft if width inadequate
3) cantilever a pontic from two or more natural teeth to two or more Division A implants

c) 1) cantilever a pontic from two or more natural teeth to two or more Division A implants
2) graft if width inadequate
3) fabricate a fixed prosthesis with one pontic connecting an implant with one or two teeth

d) None of the above

Answer 6

a) 1) graft if width inadequate
2) cantilever a pontic from two or more natural teeth to two or moreDivision A implants
3) fabricate a fixed prosthesis with one pontic connecting an implant with one or two teeth

Question 7

What is the ideal direction for a cantilever if it is to be used in an implant supported restoration?

a) buccally
b) lingually
c) mesially
d) distally

Answer 7

c) mesially

Question 8

Which of the following statements are true regarding why implants should rarely be connected to anterior teeth?

1) anterior teeth often have greater clinical mobility than the implant can tolerate
2) lateral forces applied to the restoration during mandibular excursions are transmitted to the natural tooth and implant abutments
a) 1&2 are true
b) 1 not 2 are true
c) 2 not 1 is true
d) both false

Answer 8

a) 1&2 are true

Question 9

The most important criterion for an implant-tooth supported restorations is:

a) parallelism
b) root surface area
c) tooth mobility
d) periodontal status

Answer 9

c) tooth mobility

Question 10

Which arch form yields optimal resistance and stability for a prosthesis?

a) flat
b) square
c) tapering
d) narrow

Answer 10

b) square