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implantology > Final > Flashcards

Final Flashcards

1
Q

Why is prosthetic space important?

A

different materials require certain space to function properly with reduced problems and prosthetic space decreases stress

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2
Q

When is bone sounding better than cone beam and visa versa

A

bone sounding gives you a better idea of soft tissue

CBCT is best for bony to bony measurements

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3
Q

what is a good indicator that the implant can be immediately loaded?

A

surgical torque value when placed

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4
Q

when placing an implant, what are the thicknesses of tissue from free gingival margin to bone going to be at papilla and zenith points?

A

5mm at papilla

3mm at zenith

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5
Q

what are 2 contraindications for implants?

A

IV bisphosphenates and radiation therapy to the jaw

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6
Q

what are 4 implant risk factors?

A
  • smoking
  • periodontal disease
  • oral bisphosphenates
  • bruxism
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7
Q

Discuss the difference between 4 implants in front of the mental foraminous and 4 spread widely apart (2 in front, 2 behind)

A

Putting all 4 implants between foraminous gives you A-P rocking
4 Spread widely increases your AP spread and reduces rocking

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8
Q

Discuss splinting implants with bars on maxilla vs mandible

A

Splinting maxilla makes 10% difference increase in implant success
NO difference on mandible

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9
Q

Describe the value of over denture over a bar or hybrid denture

A

Over dentures are easier to clean, easier to fix and less expensive

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10
Q

Describe value of hybrid denture over an overdenture

A

hybrids crush food better and you get the feeling of having “normal” teeth, also do very good sociologically

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11
Q

describe value of bar retained over an overdenture

A

a bar retained allows cleaning and crushes food better (70%)

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12
Q

Advantages of stock abutments

A
  • a little cheaper

- you can keep them on hand

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13
Q

Advantages of custom abutments

A

better adapted to tissue
better crown support
-better emergence profile

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14
Q

WHAT instrument used to remove screws that have been torqued to manufactures instruction

A

torque wrench

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15
Q

what instrument used to remove locator liners, locator abutments and places liners?

A

locator core tool

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16
Q

disadvantages of cement retained crowns are

A

when they do come loose, you have to access through the crown
have junction at gemlike–>becomes visible w/recession

17
Q

advantages of cement retained crown

A

can put access anywhere
more matrial variablilty
better esthetics
zirconia abutment option

18
Q

advantages of screw retained crown

A

no cement in sulcus
less expensive
fast delivery
can retrieve at any time

19
Q

disadvantages of screw retained crown

A

changes work flow since were used to cementing crowns

access placement is less in our control

20
Q

what is the min. height difference between screw retained and cement retained crowns?

A

5mm or less=screw retained

21
Q

what substructure material is most translucent?

A

zirconia

22
Q

what substructure material is strongest?

A

metal (PFM or base metal)

23
Q

what substructure has ability to have its screw accessed from a different angle than the long access of the implant?

A

single units: zirconia

full arch-titanium or non-precious metals

24
Q

what substructure material is weakest?

A

zirconia

25
Q

what substructure materials can be screw retained?

A

metal and zirconia

26
Q

what is a voxel?

A

3D version of a pixel to measure volume. Helps understand depths in CBCT

27
Q

Describe purposes between bone reduction guide and implant placement template

A

reduction guide- can be used for dentures or implant so the prosthetic fits better
IPT-directs position in 3 dimensions for implant placement

28
Q

When the head of a screw breaks off why does the screw require less force to remove?

A

the spring doesn’t have tension pushing against the threads that the head of the screw provided

29
Q

would your temporary implant abutment for single unit be better as engaging abutment or non-engaging?

A

engaging because any movement could lead to infection, necrosis of tissue, tissue being pinched.
If for a bridge then use non-engaging

30
Q

Why would you risk implant failure to immediately temporize an implant?

A

to hold the position of the bone

31
Q

T or F: over dentures and single unit implants utilize arbitrary implant placement?

A

False, just dentures

32
Q

what can you do to avoid locking a denture in during direct pickup of locator housings?

A

put white spacers on

watch for undercuts

33
Q

Describe platform switching

A

prosthetic component more narrow than platform so you get less bone loss

34
Q

What can you do to avoid incorrectly eating implant coping if most of the implant platforms are below the gums?

A

x ray it

35
Q

3 reasons implant impression coping for single unit wouldn’t seat properly when taking impression

A
  1. bone grown over site
  2. tissue overgrowth/pinched
  3. hex off, timing incorrect
36
Q

Describe direct technique for placing locator housings in a denture

A
  1. housings put on with white spacers
  2. cut holes into denture so rests only on tissue
  3. place acrylic in holes
  4. place denture on top of housings and let acrylic set up
37
Q

what is the difference between external hex implant and internal hex implant?

A

external hex is easier to remove for bridges, does anti-rotational but not as good as internal
internal hex has larger surface area to help resist dislodgment and better anti-rotational properties

38
Q

whats the difference between implant analog and implant replica?

A

THERe IS NO DIFFERENCE

39
Q

open tray implant impression vs closed tray

A

open tray has holes in the bottom of the tray so you can unscrew the coping. It can be used on any case

closed tray type of impression were used to so its predictable, but can’t use for diverging implants

implantology (1 decks)

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