6/26 & 8/8 - Try In and Adjustment of Gold Restorations, 387-398, S5-S8 (Heavy Emphasis)

Question 1

do you use anesthetic when trying and adjusting gold restorations

Answer 1

depends

Anesthesia ruins pts occlusal perception which may help when seating

Question 2

what symptoms do you assess during try-in and adjustment of gold restorations

Answer 2

1. hypersensitivity
2. provisional hyper occlusion
3. additional thermal and chemical trauma of permanent cementation

Question 3

can you cement a permanent crown over a symptomatic tooth

Answer 3

NEVER

Question 4

how do you prevent swallowing or aspiration of crown

Answer 4

1. safety ring and floss
2. floss around bridges

Question 5

how much floss to use as safety

Answer 5

1 foot

Question 6

what can you use to remove provisional

Answer 6

1. walls carver or discoid end of cleoid-discoid
2. hemostat or backhaus forceps
3. straight chisel and mallet
4. Richwil (Almore) crown removal

Question 7

what is the cementation sequence

Answer 7

KNOW THIS!!! PMOCE

1. proximal contacts
2. margins (completeness of seating e.g., “fit”)
3. occlusion
4. contours
5. esthetics

Question 8

what do you use to check proximal contacts

Answer 8

floss

Question 9

proximal contacts should be adjusted to equal what

Answer 9

other contacts in the mouth

Question 10

when checking proximal contacts, should you make sure the crown doesn’t wobble off prepped tooth

Answer 10

YES

Question 11

T/F: the perception of the patient in most cases will be able to help with determining proximal contacts

Answer 11

TRUE

Question 12

what is considered an open margin

Answer 12

50 microns and tip of explorer

Question 13

what are the three types of defective margins

Answer 13

1. overhangs (overextended and thick)
2. ledge (underextended)
3. open

Question 14

what type of overhang can you absolutely not cement? why?

Answer 14

open - bacteria will accumulate in this area

Question 15

what typically causes a defective margin

Answer 15

undercut, an unseen defect, or distortion

Question 16

what materials can be used to locate internal discrepencies

Answer 16

1. chloroform and rouge
2. occlude
3. disclosing wax
4. fit checker

Question 17

T/F: you can burnish all accessible margins intraorally with a smooth, dull instrument

Answer 17

TRUE

Question 18

if the patient can hold shim stock on adjacent teeth without but not with the crown, the crown is too [low or high]

Answer 18

HIGH

Question 19

instead of testing shim with just shim and hand, grady does what in presentation

Answer 19

shim and articulating forceps (slide 12)

Question 20

a premature contact on the buccal incline of the maxillary palatal cusp produces a ___ shift of the mandible

Answer 20

buccal

Question 21

a premature contact on the palatal slope of the maxillary cusp produces a ___ shift of the mandible

Answer 21

lingual

Question 22

a premature contact on the palatal incline of the maxillary cusp produces a ___ shift of the mandible

Answer 22

lingual

Question 23

what interferences are you looking for when checking occlusion for crown

Answer 23

1. nonworking interference
2. working interference
3. protrusive inteference

Question 24

what do you use to remove sprew from crown

Answer 24

Joe Dandy/separating disc

Question 25

when checking proximal contacts of your crown, should you adjust one side at a time

Answer 25

Yep

Question 26

what bur to put anatomy into metal crown

Answer 26

round acrylic bur

Question 27

should you polish parallel to the margin of the crown?

Answer 27

NO! do it perpendicular

Question 28

can you use round acrylic bur to burnish metal crown

Answer 28

yes

Question 29

what is the name of the green, sticky cube that could be used to remove crown? how to use it?

Answer 29

Richwil crown remover

1. cube softened in hot water and placed over the crown.
2. patient is instructed to bite onto cube and hold for few seconds
3. quick opening of mouth should remove crown from prep (requires firm, natural opposing teeth with no cemented restorations on them)

Question 30

what to check during clinical try-in of fixed restorations

Answer 30

1. proximals
2. margins = fit
3. occlusion
4. shade (also contour, texture and characterization)

Question 31

what types of occlusion should be evalulated during try in

Answer 31

centric and eccentric

Question 32

what is the minimum thickness of a crown

Answer 32

0.5 mm

Question 33

Answer 33

Red = overhang (overextended, thick)
Green = open
Yellow = ledge (under extended)