Midterm questions

Question 1

The most common type of implant used today:

Answer 1

endosteal

Question 2

Branenark suggested that bone necrosis would occur if the bone was heated to ____ degrees celcius

Answer 2

47

Question 3

According to the Harvard guidelines of 1986, which of the following is false:

a) there should be no sign of peri-implant infection
b) implants should be immobile
c) implants should be pain free
d) there should be no more than 2mm of bone loss per year

Answer 3

d) there should be no more than 2mm of bone loss per year

Question 4

The implant systems that we used at UMKC are:

Answer 4

1. Straumen
2. Nobel care
3. Astra tech

Question 5

Which of the following is NOT a surface modification for implants?

a) acid-etched
b) sodium-phosphate
c) plasma spray
d) sand blasted

Answer 5

b) sodium-phosphate

Question 6

An individual gets tired walking 1-2 blocks and does light housework, what is their risk of myocardial infarction?

Answer 6

Major

Question 7

A patient with a BP of 150/90 and uncontrolled diabetes is classified as ASA:

Answer 7

class 3

Question 8

A patient with uncontrolled angina is classified as ASA:

Answer 8

class 4

Question 9

Given a case study, what is NOT a reason that an implant should be contraindicated?

Answer 9

age

Question 10

T/F: A patient with a mitral valve prolapse requires antibiotic prophylaxis

Answer 10

False

Question 11

Which of the flowing is an effect of detrimental effects of tobacco:

a) tissue hypoxia
b) increase platelet aggregation
c) neutrophil dysfunction
d) decreases fibroblast & collagen
e) all of the above

Answer 11

e) all of the above

Question 12

Maxillomandibular relationship allows tooth position that has normal articulation with the teeth supported by the residual ridge. Which of the following is the most favorable relationship:

Answer 12

Class 1

Question 13

For a 4mm implant, what is the minimal distance of the ridge bucco-lingually?

Answer 13

6 mm

Question 14

T/F: A patient with severe bruxism has the least favorable out come of success

Answer 14

True

Question 15

The anterior maxilla resorbs slower than the anterior mandible. The maxilla resorbs faster than the mandible.

Answer 15

First- true
Second- false

Question 16

For implant placement or osteotomy, failure tends to occur at angulation of:

Answer 16

Greater than 25 degrees

Question 17

Which of the following is NOT true of a CBCT?

a) a CBCT is more grainy than a CT
b) a CBCT has better soft tissue contrast than a CT
c) a CBCT is less expensive
d) a CBCT causes less radiation

Answer 17

b) a CBCT has better soft tissue contrast than a CT

Question 18

Which of the following can show the buccal-lingual dimensions?

a) intraoral films
b) panoramic films
c) CBCT
d) CT
e) CBCT & CT

Answer 18

e) CBCT & CT

Question 19

Two types of new bone formation include:

Answer 19

1. intramembraneous
2. endochondrial

Question 20

Which of the following forms when woven bone is replaced by lamellar bone?

Answer 20

Osteonal remodeling

Question 21

Who discovered the theory of osteointegration?

Answer 21

Branemark

Question 22

Which type of bone is formed around an implant?

Answer 22

contact bone

Question 23

Which of the following is NOT true regarding contact osteogenesis?

Answer 23

Forms on top of old bone

Question 24

Biologic width around a tooth?

Answer 24

2 mm (JE + CT)

Question 25

Connection around an implant:

Answer 25

hemidesmosomes just epithelial

Question 26

Percentage of implant success in diabetes:

Answer 26

85.5-100%

Question 27

How many mm of clearance for a screw retained?

Answer 27

4 mm

Question 28

How many mm of clearance for a cement retained?

Answer 28

7 mm

Question 29

Direct contact between living bone and implant seen on light microscope:

Answer 29

osseointegration

Question 30

Distance between implant and tooth:

Answer 30

1.5 mm

Question 31

Distance between two implants:

Answer 31

3 mm

Question 32

Minimum biologic width for an implant:

Answer 32

3 mm

Question 33

Amount of contact between crestal bone and contact:

Answer 33

5 mm

Question 35

Implant and real tooth, interdental papilla is dependent on:

Answer 35

adjacent tooth

Question 36

Safety zone of bone:

Answer 36

2 mm

Question 37

Soft tissue is better viewed on:

Answer 37

Medical CT

Question 38

Lingual concavity can be viewed on what type of radiograph?

Answer 38

medical CT & CBCT

Question 39

What is the mineral density scan?

Answer 39

DEXA

Question 40

Best form of intraoral x-ray:

Answer 40

parallel

Question 41

Eposteal=

Answer 41

subperiosteal

Question 42

Transosteal=

Answer 42

transmandibular

Question 43

Endosteal=

Answer 43

blade & root form

Question 44

Rough surface of implant allows for:

Answer 44

appositional bone growth

Question 45

A patient needs an implant on #12 and #13. There is 8 mm buccal-lingually and 13.5 mm medially-distally. What is the maximum diameter of implants that can be used:

Answer 45

4.3 mm diameter and 3 mm diameter

Question 46

A UCLA implant can be used with:

Answer 46

1. screw retained crown 2. custom abutment

Question 47

What is advantageous about a screw retained crown?

Answer 47

Can be used with a decreased vertical space

Question 48

A disadvantage of a cemented crown is:

Answer 48

can't be easily removed

Question 49

The open tray technique is a _____ impression technique used for ____ implants

Answer 49

direct; divergent

Question 50

with splinting during multiple impression copings, which of the following is true:

Answer 50

Rigid splitting is preferred

Question 51

The closed technique is:

Answer 51

most similar to a fixed prosthetic impression

Question 52

The maximum torque on an abutment should be:

Answer 52

35 Ncm

Question 53

Regarding cementation, which of the following is true?

Answer 53

Blockout material is placed over the screw head

Question 54

Which of the following has the most variable magnification?

Answer 54

panoramic

Question 55

Which of the following has the highest level of radiation?

Answer 55

Medical CT

Question 56

An implant has a higher occlusal awareness than a natural tooth. An implant has a functional bite force 4x that of a natural tooth:

Answer 56

First- false Second- true

Question 57

A tooth exhibits more vertical movement than an implant resulting in lower occlusal loads on the implant. The implant tooth will not move under any functional load.

Answer 57

Both false

Question 58

The primary occlusal contact should be placed:

Answer 58

directly over the implant

Question 59

the maxilla undergoes ____ resorption and can cause a ____ with the posterior dentition

Answer 59

centripetal; cross-bite

Question 60

D4 bone is described as all the following except:

Answer 60

found in the anterior mandible

Question 61

splinting adjacent implant crowns is indicated in which of the following:

Answer 61

1. questionable bone 2. parafunctional habits 3. implant surgical depends on the adjacent implants (all of the above)

Question 62

Splinting of an implant crown can cause which potential implants:

Answer 62

1. if one crown is replaced all crowns will usually have to be replaced 2. hygiene is difficult 3. fit in a passive occlusion is difficult (all of the above)

Question 63

Implant retained dentures is contraindicated with:

Answer 63

1. poor quality of bone 2. poor oral hygeine 3. poor tissue tolerance 4. patients who receive > 12000 rads od radiation (all of the above)

Question 64

An implant retained denture is an examine of:

Answer 64

overdenture

Question 65

How many mm of space must be present between the bone and opposing occlusion in a single implant crown?

Answer 65

6 mm

Question 66

What is shown in the following image?

Answer 66

driver

Question 67

What is shown in the following image?

Answer 67

impression coping

Question 68

What is shown in the following image?

Answer 68

implant replica

Question 69

according to recent studies what is the average success rate for dental implants:

Answer 69

98%

Question 69

What is shown in the following image?

Answer 69

prosthetic abutment

Question 70

Which type of implant is restricted to ONLY the anterior mandible:

Answer 70

transosteal

Question 71

Which type of implant is included by "in the bone"?

Answer 71

Endosteal

Question 72

What type of implant is a subperiosteal?

Answer 72

eposteal

Question 73

What is the average amount of bone loss after the 1st year of implant placement?

Answer 73

0.1 mm

Question 74

Which of the following is NOT a characteristic of titanium of titanium alloy used for dental implants?

Answer 74

high modulous of elasticity

Question 75

Which surface texture is the most ideal for dental implants?

Answer 75

moderately rough

Question 76

What is NOT a method of surface modification?

Answer 76

Cobalt-chromium coating

Question 77

Which bone cell type deposits osteoid matrix:

Answer 77

osteoblasts

Question 78

What is the ideal torque for immediate loading?

Answer 78

greater than 35 Ncm

Question 79

What is FALSE regarding dental implants? a) supracrestal tissue is lost b) ankylosis c) direct bone-to-implant contact d) peri-implant are oriented perpendicular to the implant

Answer 79

d- because the fibers are parallel not perpendicular

Question 80

What is FALSE regarding dental implants? a) blood supply is by terminal branch of large blood vessels b) more ininflammatory response than gingival fibers c) fewer capillaries d) blood supply is from the endosteum

Answer 80

d- because blood supply is from the periosteum

Question 81

How much space should be between implant and tooth?

Answer 81

1.5 mm

Question 82

How much space should be between implants?

Answer 82

3 mm

Question 83

Which is false regarding the benefits of platform switching? a) shifts the inflammatory cell infiltrate inward and away from the adjacent crestal bone b) maintains the supracrestal attachment c) decreases the distance of implant-abutment junction from the crestal bone d) limits possible interface of bone with micro-movements

Answer 83

C- decreases the distance of implant-abutment junction from the crestal bone