Final

Question 1

Why is prosthetic space important?

Answer 1

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

Question 2

When is bone sounding better than cone beam and visa versa

Answer 2

bone sounding gives you a better idea of soft tissue

CBCT is best for bony to bony measurements

Question 3

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

Answer 3

surgical torque value when placed

Question 4

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

Answer 4

5mm at papilla

3mm at zenith

Question 5

what are 2 contraindications for implants?

Answer 5

IV bisphosphenates and radiation therapy to the jaw

Question 6

what are 4 implant risk factors?

Answer 6

• smoking
• periodontal disease
• oral bisphosphenates
• bruxism

Question 7

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

Answer 7

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

Question 8

Discuss splinting implants with bars on maxilla vs mandible

Answer 8

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

Question 9

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

Answer 9

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

Question 10

Describe value of hybrid denture over an overdenture

Answer 10

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

Question 11

describe value of bar retained over an overdenture

Answer 11

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

Question 12

Advantages of stock abutments

Answer 12

• a little cheaper

- you can keep them on hand

Question 13

Advantages of custom abutments

Answer 13

better adapted to tissue
better crown support
-better emergence profile

Question 14

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

Answer 14

torque wrench

Question 15

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

Answer 15

locator core tool

Question 16

disadvantages of cement retained crowns are

Answer 16

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

Question 17

advantages of cement retained crown

Answer 17

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

Question 18

advantages of screw retained crown

Answer 18

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

Question 19

disadvantages of screw retained crown

Answer 19

changes work flow since were used to cementing crowns

access placement is less in our control

Question 20

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

Answer 20

5mm or less=screw retained

Question 21

what substructure material is most translucent?

Answer 21

zirconia

Question 22

what substructure material is strongest?

Answer 22

metal (PFM or base metal)

Question 23

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

Answer 23

single units: zirconia

full arch-titanium or non-precious metals

Question 24

what substructure material is weakest?

Answer 24

zirconia

Question 25

what substructure materials can be screw retained?

Answer 25

metal and zirconia

Question 26

what is a voxel?

Answer 26

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

Question 27

Describe purposes between bone reduction guide and implant placement template

Answer 27

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

Question 28

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

Answer 28

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

Question 29

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

Answer 29

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

Question 30

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

Answer 30

to hold the position of the bone

Question 31

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

Answer 31

False, just dentures

Question 32

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

Answer 32

put white spacers on | watch for undercuts

Question 33

Describe platform switching

Answer 33

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

Question 34

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

Answer 34

x ray it

Question 35

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

Answer 35

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

Question 36

Describe direct technique for placing locator housings in a denture

Answer 36

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

Question 37

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

Answer 37

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

Question 38

whats the difference between implant analog and implant replica?

Answer 38

THERe IS NO DIFFERENCE

Question 39

open tray implant impression vs closed tray

Answer 39

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