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Intro to Implants > Midterm Questions > Flashcards

Midterm Questions Flashcards

1
Q

The most common type of implant used today:

A

Endosteal

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2
Q

Branemark suggested that bone necrosis would occur if the bone was heated to ____ degrees celsius:

A

47 degrees

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3
Q

According to the Harvard Guidelines of 1986, which of the following is false?

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

A

D- there should be no more than 2mm of bone loss per year

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4
Q

The implant systems that we use at UMKC are:

A
  1. straumen
  2. nobel care
  3. astra tech
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5
Q

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

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

A

b- sodium phosphate

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6
Q

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

A

Major

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7
Q

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

A

Class 3

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8
Q

A patient with uncontrolled angina is classified as ASA:

A

Class 4

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9
Q

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

A

Age

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10
Q

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

A

False

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11
Q

Which of the following is an effect of detrimental effects of tobacco?

a- tissue hypoxia
b- increased platelet aggregation
c- neutrophil dysfunction
d- decreases fibroblasts and collagen
e- all of the above

A

E- all of the above

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12
Q

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

A

Class 1

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13
Q

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

A

6 mm

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14
Q

T/F: A patient with severe bruxism has the leas favorable outcome of success:

A

True

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15
Q

The anterior maxilla resorbed slower than the anterior mandible. The maxilla resorbs foster than the mandible.

A

First statement true; second statement false

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16
Q

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

A

Greater than 25

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17
Q

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

A

A CBCT has better soft tissue contrast than a CT

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18
Q

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

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

A

E- CBCT & CT

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19
Q

Two types of new bone formation include:

A
  1. intramembraneous
  2. endochondrial
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20
Q

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

A

Osteonal remodeling

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21
Q

Who discovered the theory of osseointegration?

A

Branemark

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22
Q

Which type of bone is formed around an implant?

A

Contact bone

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23
Q

Which of the following is NOT true regarding contact osteogenesis?

A

Forms on top of old bone

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24
Q

The biologic width around the tooth:

A

2mm (JE + CT)

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25
Q

Connection around the implant:

A

hemidesmosomes just epithelial

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26
Q

Percentage of implant success in diabetes?

A

85.5-100%

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27
Q

How many mm of clearance for screw retained?

A

4mm

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28
Q

How man mm of clearance for cement retained?

A

7mm

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29
Q

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

A

Osseointegration

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30
Q

How much distance is required between implant and tooth?

A

1.5mm

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31
Q

Distance between two implants?

A

3mm

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32
Q

Minimum biologic width for an implant:

A

3mm

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33
Q

amount of contact between crystal bone and contact:

A

5 mm

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34
Q

Implant and real tooth, interdental papilla is dependent on:

A

adjacent tooth

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35
Q

Safety zone of bone:

A

2mm

36
Q

Soft tissue is better seen on:

A

Medical CT

37
Q

Lingual concavity can be viewed on what type of radiograph?

A

medical CT and CBCT

38
Q

What is the mineral density scan?

A

DEXA

39
Q

The best form of intraoral x-ray?

A

parallel

40
Q

Eposteal =

A

subperiosteal

41
Q

Transosteal =

A

transmandibular

42
Q

Endosteal =

A

blade & root form

43
Q

Rough surface of implant allows for:

A

appositional bone growth

44
Q

A patient needs an implant on #12 and #13. There is 8mm BL and 13.5 mm MD. What is the maximum diameter of implants that can be used?

A

4.3mm diameter and 3mm diameter

45
Q

A UCLA implant can be used with:

A
  1. screw retained crown
  2. custom abutments
46
Q

What is advantageous about a screw retained crown?

A

Can be used with a decreased vertical space

47
Q

A disadvatnage of a cemented crown:

A

can’t be removed easily

48
Q

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

A

direct; divergent

49
Q

With splinting during multiple impression copings, which of the following is true?

A

Rigid splitning is preferred

50
Q

The closed technique is:

A

most similar to a fixed prosthetic impression

51
Q

The maximum torque on an abutment should be:

A

35Ncm

52
Q

Regarding cementation, which of the following is true?

A

blockout material is placed over the screw head

53
Q

Which of the following has the most variable magnification?

A

Panoramic

54
Q

Which of the following has the highest level of radiation?

A

Medical CT

55
Q

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

A

The first statement is false. The second statement is true.

56
Q

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.

A

Both statements false

57
Q

The primary occlusal contact should be placed:

A

directly over the implant

58
Q

The maxilla undergoes ___ resorption and can causes a ___ with the posterior dentition.

A

centripetal; cross bite

59
Q

D4 bone is described as all of the following except:

A

found in the anterior mandible

60
Q

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

A
  1. questionable bone
  2. parafunctional habits
  3. implant survival depends on the adjacent implants

(all of the above)

61
Q

Splinting of an implant to a crown can cause which potential issues:

A
  1. If one crown is replaced, all crowns will usually have to be replaced
  2. Hygiene is difficult
  3. Fits in a passive occlusion is difficult
62
Q

Implant retained dentures is contraindicated with:

A
  1. poor quality of bone
  2. poor oral hygiene
  3. poor tissue tolerance
  4. patients who receive more than 12,000 rads of radiation

(all of the above)

63
Q

An implant retained denture is an example of:

A

overdenture

64
Q

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

A

6 mm

65
Q

What is shown in the following image?

A

Driver

66
Q

What is shown in the following image?

A

Impression coping

67
Q

What is shown in the following image?

A

Implant replica

68
Q

What is shown in the following image?

A

Prosthetic abutment

69
Q

According to recent studies, what is the average success rate for dental implants?

A

98%

70
Q

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

A

Transosteal

71
Q

What type of implant is included by “in the bone”?

A

Endosteal

72
Q

What type of implant is a subperiosteal?

A

Eposteal

73
Q

What is the average amount of bone loss AFTER the first year of implant placement?

A

0.1mm

74
Q

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

A

High modulus of elasticity

75
Q

Which surface texture is the most ideal for dental implants?

A

Moderately rough

76
Q

What is NOT a method of surface modification?

A

Cobalt-chromium coating

77
Q

Which bone cell type deposits osteoid matrix?

A

osteoblast

78
Q

What is the ideal torque for immediate loading?

A

greater than 35 Ncm

79
Q

What is false regarding dental implants?

a- supracrestal tissue is lost
b- ankylosis
c- direct bone-to-imiplant contact
d- peri-implant fibers are oriented perpendicular to the implant

A

D- because peri-implant fibers are oriented parallel to the implant

80
Q

What is FALSE regarding dental implants?

a- blood supply is by terminal branch of large blood vessels
b- more inflammatory response than gingival fibers
c- fewer capillaries
d- blood supply is from the endosteum

A

d- because blood supply comes form the periosteum

81
Q

How much space should be between implant and tooth?

A

1.5 mm

82
Q

How much space should be between an implant and another implant?

A

3 mm

83
Q

Which is false regarding platform switching?

a- shifts the inflammatory cell infiltrate inward and away from the adjacent crystal bone
b- maintains the supracrestal attachment
c-decreases distance of implant-abutment junction from the crystal bone
d- limits possible interface of bone with micro-movements

A

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

84
Q

What is true when there is less than 2 mm of keratinized tissue of the implant area?

A

more prone to soft-tissue inflammation

85
Q

Which of the following is NOT a vital structure to avoid for implant placement?

A

Glenoid fossa

86
Q

Which of the following is NOT a disadvantage of panoramic radiographs?

A

Pixilation

87
Q
A

Intro to Implants (8 decks)

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