8/29 - Pre-Formed "Ion" Crowns, NEED TO ADD: 263-267, 333-340, 248-252

Question 1

what is a tin-silver alloy that is bendable and able to be shaped

Answer 1

preformed metal provisional crown

Question 2

what do you reline the intaglio surface of preformed metal provisional crown with

Answer 2

JET

Question 3

what dimension selection of preformed metal provisional crowns for molars?

Answer 3

10.2 mm - 12.4 mm

Question 4

what dimension selection of preformed metal provisional crowns for premolars?

Answer 4

6.4 mm - 9.9 mm

Question 5

preformed ion crowns work well with what preparations

Answer 5

FCC

Question 6

using preformed ion crowns minimizes the problem of what?

Answer 6

locked provisional material in gingival embrasures

Question 7

will preformed ion crowns break

Answer 7

no

Question 8

since peformed ion crowns are not custom, what can be an issue

Answer 8

shape/bulkiness

Question 9

what measuring tool used to select preformed metal crown

Answer 9

measuring gauge or boley gauge

Question 10

what dimension do you measure of the prepared tooth to select the appropriate metal provisional from the kit

Answer 10

mesial-distal dimension

Question 11

if you need to trim the preformed crown, what should you use?

Answer 11

crown and bridge scissors

Question 12

what to do if proximal contacts are too light/open

Answer 12

burnish/bend the crown from intaglio surface w/ hand instrument (burnisher)

Question 13

what disc to use to smoothen margins?

Answer 13

Moore’s discs
don’t use soflex

Question 14

what can you do to contour axial surfaces?

Answer 14

bend/crimp carefully with crimping pliers

Question 15

T/F: occlusion needs to be close before relining with Jet

Answer 15

TRUE

Question 16

when relining the material with Jet, what disc do you use to adjust margins

Answer 16

sandpaper discs

Question 17

can the back of your mirror be used to stretch your preformed crown

Answer 17

yes

Question 18

where is most trimming done on preformed ion crowns

Answer 18

mesial and distal areas

Question 19

if metal does not reach the margin (too short) then what must you do?

Answer 19

crimp the metal out away from the tooth

Question 20

why must there need to be space between the metal and tooth?

Answer 20

so excess Jet can escape to reline the marginal area

Question 21

describe the consistency of Jet when mixing

Answer 21

should be thick on instrument but flow into preformed crown

Question 22

when do you place the Jet + crown onto the preparation

Answer 22

when Jet loses its gloss

Question 23

should M and D contacts drag shim under pressure and/or snap floss?

Answer 23

YES

Question 24

where should interproximal contacts be placed

Answer 24

middle to occlusal 1/3