Question 1

The bone is prepared for an endosseous dental implant with special metallic burs driven at _____ speeds _____ water-cooling.

Accepted Answer

A)   high; without
B)   slow; without
C)   high; with
D)   slow; with D

Question 2

High temperatures in bone during endosseous implant placement will:

Accepted Answer

A)   damage tissue.
B)   promote rapid healing.
C)   trigger inflammation.
D)   do both A and B.
E)   do both A and C. E

Question 3

If the temperature during the osteotomy exceeds 37° C,then _____ could occur.

Accepted Answer

A)   tissue damage.
B)   protein coagulation.
C)   inflammation.
D)   all of the above.
E)   only B and C. D

Question 4

Burs for preparation of the implant site are composed of special alloys of:

Accepted Answer

A)   stainless steel.
B)   nickel.
C)   titanium.
D)   platinum.

Question 5

The prosthesis is most commonly screwed into place with a small screw that penetrates the top of the crowns and threads into the:

Accepted Answer

A)   abutment.
B)   healing cap.
C)   implant.
D)   bone.

Question 6

Increasing amounts of oxygen increase the _____ of commercially pure titanium alloys used for endosseous implants.

Accepted Answer

A)   strength
B)   ductility
C)   modulus of elasticity
D)   density
E)   melting range

Question 7

Which type of implant-supported prosthesis is most likely to fail?

Accepted Answer

A)   Maxillary complete denture
B)   Mandibular complete denture
C)   Single crown
D)   Multiple tooth endosseous implant not connected to natural teeth
E)   Multiple tooth endosseous implant connected to natural teeth

Question 8

An oxygen concentration of _____ wt % is used in grade 1 commercially pure titanium implant alloys.

Accepted Answer

A)   0.01
B)   0.08
C)   0.18
D)   0.4

Question 9

Ceramic coatings improve bone-implant bond strengths.Their long-term stability in service is uncertain.

Accepted Answer

A)   Statement 1 is correct; statement 2 is correct.
B)   Statement 1 is correct; statement 2 is incorrect.
C)   Statement 1 is incorrect; statement 2 is correct.
D)   Statement 1 is incorrect; statement 2 is incorrect.

Question 10

For most clinical situations,implant success rates are more than ____% as long as the implant osseointegrates initially and the clinical environment is not extreme.

Accepted Answer

A)   50
B)   75
C)   90
D)   95

Question 11

Once the implant site is prepared in bone,the endosseous implant is placed by:

Accepted Answer

A)   pounding it into place with a small hammer.
B)   screwing the implant into the site.
C)   friction-fitting the implant.
D)   both A and B.
E)   both B and C.

Question 12

Peri-implantitis is caused by:

Accepted Answer

A)   high occlusal forces.
B)   ineffective plaque removal.
C)   poor osseointegration.
D)   horizontal bone loss.

Question 13

The thickness of most ceramic coatings on implants ranges from _____ microns.

Accepted Answer

A)   2 to 5
B)   5 to 10
C)   10 to 50
D)   50 to 100
E)   100 to 500

Question 14

Scratches or other disruption of the original manufacturer's oxide layer on the surface of endosseous implants are discouraged.Any contamination of the original surface will increase the risk of failure of the implant to osseointegrate.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second statement is false.
D)   The first statement is false; the second statement is true.

Question 15

Which of the following statements is(are)true about the surface of commercially pure titanium or titanium alloy?

Accepted Answer

A)   Both are covered with a complex mixture of adherent titanium oxides.
B)   Oxides rich in oxygen are closer to the surface.
C)   Oxides rich in oxygen are closer to the alloy.
D)   A and B are true statements.
E)   A and C are true statements.

Question 16

Implants are constructed from:

Accepted Answer

A)   stainless steel.
B)   gold.
C)   titanium.
D)   platinum.

Question 17

Endosseous implants provide an esthetic substitute for a lost or missing tooth.They are placed to restore lost centric occlusion.

Accepted Answer

A)   Statement 1 is correct; statement 2 is correct.
B)   Statement 1 is correct; statement 2 is incorrect.
C)   Statement 1 is incorrect; statement 2 is correct.
D)   Statement 1 is incorrect; statement 2 is incorrect.

Question 18

During the second stage of a two-stage implant placement,a second surgery is performed to remove the healing caps and:

Accepted Answer

A)   recontour gingival tissue.
B)   recontour the osseous crest of bone.
C)   place the abutment caps.
D)   place the abutments.

Question 19

A rate of horizontal bone loss greater than _____ mm per year is a sign of a failing implant.

Accepted Answer

A)   0.01
B)   0.1
C)   0.3
D)   0.5

Question 20

Occlusal forces on natural teeth favor bone maintenance.However,occlusal loads on dental implants are transmitted to bone mostly by compressive forces that tend to cause resorption of the bone.

Accepted Answer

A)   Both statements are true.
B)   Both statements are false.
C)   The first statement is true; the second statement is false.
D)   The first statement is false; the second statement is true.

Exam 15: Dental Implants

The bone is prepared for an endosseous dental implant with special metallic burs driven at _ speeds _ water-cooling.

High temperatures in bone during endosseous implant placement will:

If the temperature during the osteotomy exceeds 37° C,then _____ could occur.

Burs for preparation of the implant site are composed of special alloys of:

The prosthesis is most commonly screwed into place with a small screw that penetrates the top of the crowns and threads into the:

Increasing amounts of oxygen increase the _____ of commercially pure titanium alloys used for endosseous implants.

Which type of implant-supported prosthesis is most likely to fail?

An oxygen concentration of _____ wt % is used in grade 1 commercially pure titanium implant alloys.

Ceramic coatings improve bone-implant bond strengths.Their long-term stability in service is uncertain.

For most clinical situations,implant success rates are more than ____% as long as the implant osseointegrates initially and the clinical environment is not extreme.

Once the implant site is prepared in bone,the endosseous implant is placed by:

Peri-implantitis is caused by:

The thickness of most ceramic coatings on implants ranges from _____ microns.

Scratches or other disruption of the original manufacturer's oxide layer on the surface of endosseous implants are discouraged.Any contamination of the original surface will increase the risk of failure of the implant to osseointegrate.

Which of the following statements is(are) true about the surface of commercially pure titanium or titanium alloy?

Implants are constructed from:

Endosseous implants provide an esthetic substitute for a lost or missing tooth.They are placed to restore lost centric occlusion.

During the second stage of a two-stage implant placement,a second surgery is performed to remove the healing caps and:

A rate of horizontal bone loss greater than _____ mm per year is a sign of a failing implant.

Occlusal forces on natural teeth favor bone maintenance.However,occlusal loads on dental implants are transmitted to bone mostly by compressive forces that tend to cause resorption of the bone.