seating fixed restorations

Question 1

most commonly encountered issues when seating crowns

Answer 1

occlusal and contact problems

Question 2

crown fits the model but not the mouth?

Answer 2

model was wrong or mouth has changed

Question 3

what could make the model wrong

Answer 3

bad impression
distorted impression
improper pouring up

Question 4

what could make the mouth change

Answer 4

provisional has been off for a while
supra eruption of prepped tooth/opposing tooth
mesial drift

Question 5

advantages of the uncut cast

Answer 5

doesn’t allow for die to move
does not get the wear that a die does
more similar to the actual interproximal relationship of teeth

Question 6

disadvantages of the uncut cast

Answer 6

requires a second pour
requires extra trimming to eliminate soft tissue interferences
will not compensate for inaccurate impression (same issue as master cast shit tho)

Question 7

what to do before you try on a crown

Answer 7

clean all the cement off, use a prep cleaning agent or pumice only prophy paste

Question 8

should you use flavored prophy paste to clean a tooth off before seating a crown

Answer 8

no

Question 9

what adjustments can be done before the patient arrices

Answer 9

preliminary inter proximal using UNCUT cast

Question 10

if a crown rocks, what does that usually mean

Answer 10

interproximal problems

Question 11

what bur should you use to adjust alloy surfaces

Answer 11

carbide only (no diamond)

Question 12

what should use use to adjust porcelain and zirconia

Answer 12

NOT carbide

Question 13

margin is open but interproximals are ok….what to check?

Answer 13

check interior of crown for interference

Question 14

what material should you avoid when checking interior interferences

Answer 14

occlude (green stuff)

use fit checker instead

Question 15

what types of crowns should you NOT do internal adjustments to

Answer 15

porcelain, ceramic or zirconia

you will need to remake them

Question 16

order of adjustments

Answer 16

IP contacts then margins then occlusal adjustment

Question 17

how to use shimstock

Answer 17

use hemostats and check where it should be tight when the bite before seating the crown

then put the crown on and do the same thing and then use your brain

Question 18

should you ask the patient to grind their teeth when using articulating paper

Answer 18

no just tap bc you want to adjust to the patients usual bite initially

Question 19

what can you put on the crown to make articulating paper marks show up better

Answer 19

copalite randomly

Question 20

should you seat the crown with a ton of force like biting on shit

Answer 20

no just use finger pressure

Question 21

when is the best time to check for seating errors

Answer 21

right after you seat it, place cotton roll in between opposing teeth and crown and have patient bite. check quickly with shim stock, dont wait until cement has set

Question 22

do you need to use those little wood stick things

Answer 22

not usually