Chapter 8

Question 1

Stress and strain relationship has been shown to be an :

a- Important parameter to determine the length of the implant
b- Important parameter to determine the sufficient space between the implant and the natural tooth
c- Important diameter for crestal bone maintenance and implant survival
d- Important diameter for the selection of the implant size

Answer 1

c- Important diameter for crestal bone maintenance and implant survival

Question 2

The average force bite can range from
a-	10 lb – 350 lb
b-	10 lb – 635 lb
c-	80 lb – 350lb
d-	50 lb – 1000lb

Answer 2

a- 10 lb – 350 lb

Question 3

The rate of the bone remodeling around the implant and the natural tooth per year is

a- 85%(around the implant) 40% around the natural tooth
b- 40% (around the implant) 500% around the natural tooth
c- 500% (around the implant) 40% around the natural tooth
d- 65% ( around the implant ) 230% around the natural tooth

Answer 3

c- 500% (around the implant) 40% around the natural tooth

Question 4

Bone is stronger when:

a- Loaded in compression, 30% weaker when loaded in tension and 65% weaker when loaded in shear.
b- Loaded in tension, 30% weaker when loaded in compression and 65% weaker when loaded in shear.
c- Loaded in compression, 30% weaker when loaded in compression and 65% weaker when loaded in tension
d- Loaded in shear, 30% weaker when loaded in compression and 65% weaker when loaded in tension

Answer 4

a- Loaded in compression, 30% weaker when loaded in tension and 65% weaker when loaded in shear.

Question 5

The implant body should be oriented to provide:

a- Long axis compressive loads to the implant and to decrease shear loads to the crestal bone region.
b- Long axis tension loads to the implant and to decrease the shear loads to the crestal bone.
c- Long axis shear loads to the implant and to decrease the compression loads to the crestal bone
d- Long axis tension loads to the implant and to decrease the compression loads to the crestal bone

Answer 5

a- Long axis compressive loads to the implant and to decrease shear loads to the crestal bone region.

Question 6

The implant should be inserted

a- 6% angulated to the curve of Wilson and curve of Spee
b- 15% angulated to the curve of Wilson and curve of Spee
c- 30% angulated to the curve of Wilson and curve of Spee
d- Perpendicular to the curve of Wilson and curve of Spee

Answer 6

d- Perpendicular to the curve of Wilson and curve of Spee

Question 7

The average mesiodistal dimension for a central incisor is:

a- 5.6mm for a male and 5.1mm for a female
b- 8.6mm for a male and 8.1mm for a female
c- 7.3mm for a male and 6.4 mm for a female
d- 6.4mm for a male and 5.7mm for a female

Answer 7

b- 8.6mm for a male and 8.1mm for a female

Question 8

The horizontal dimension of a wedge-shaped bone defect around an implant at the crest of the ridge, from the biological width, implant design, or occlusal overload is about

a- 1.6mm
b- 2.3mm
c- 3mm
d- 1.4mm

Answer 8

d- 1.4mm

Question 9

A 4.1mm crest module (on a 3.75mm implant) needs:

a- 7.1mm of mesiodistal crestal bone
b- 6.5mm of the mesiodistal crestal bone
c- 8.1mm of the mesiodistal crestal bone
d- 4.1mm of the mesiodistal crestal bone

Answer 9

a- 7.1mm of mesiodistal crestal bone

Question 10

When the diameters of the molar implants do not provide sufficient surface area

a- The number of the implant should be increased
b- Long implants should be placed
c- Short implants should be placed
d- No implants should be placed

Answer 10

a- The number of the implant should be increased