Exam (elaborations)
Stainless Steel Crowns.
Stainless Steel Crowns.
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Stainless Steel Crowns1 other name for a stainless steel crown - ANS-- performed metal crowns
2 disadvantages of SSC - ANS-1. esthetics
2. parental concerns (think silver crown is the same as "silver" amalgam filling
3 metals the SSC contains; what metal does it not contain? - ANS-- NO MERCURY
Contains:
1. nickel
2. chromium
3. iron
6 advantages of SSC - ANS-1. inexpensive
2. full coverage prevents recurrent decay
3. can be placed with poor isolation
4. placement is relatively quick
5. can restore broken-down teeth
6. durable
contoured SSC - ANS-- trimmed and contoured (festooned = natural contour
crimping - ANS-- bending the gingival margin of the crown to ensure a snug fit
- use #118 pliers
crown contouring:
- definition
- how to do it - ANS-- contouring is bending the gingival 1/3 of the crown inward to
ensure a good fit
- bend gingival 1/3 INWARD to restore the anatomical margins and reduce the margin
circumference
finishing and polishing: what to use - ANS-- heatless stone to smooth jagged edges
- rubber wheel to remove small scratches and smooth
- polish surface of crown to a high shine with tripoli and rouge
Hall crown:
- what is it?
, - how it works
- advantage
- disadvantage - ANS-- Cementation of an SSC over a caries-affected primary molar
*without local anesthetic, caries removal, or tooth prep*
- how it works: bacteria sealed into the tooth and denied of substrate will die rather than
result in caries progression
- advantage: reduce discomfort because no local anesthetic and decrease bacterial load
by sealing caries
- disadvantage: discomfort when using spacer bands and/or placing the crown, or high
occlusion
how to fix this issue: resistance in crown seating with tissue blanching - ANS-- crown is
too wide (prelim contouring)
- crown is too long
- tissue caught in the margin
how to fix this issue: resistance in crown seating without tissue blanching - ANS-- check
for high spots on occlusal surface
- check for ledges
identifying the crown:
- what does the initial letter mean?
- what does the box corner mean?
- what does the number mean? - ANS-Initial letter
- D = 1st primary molar
- E = 2nd primary molar
Box corner
- corner of the box will always be positioned on the MB cusp
Number
- represents the size of the crown (direct relationship of size and #)
indications for using a SSC (name as many as you can, there's way too many) - ANS-1.
extensive caries
2. cervical decalcification
3. developmental defects
4. not being able to use other resto materials
5. following a pulpotomy or pulpectomt
6. restoring a primary tooth to be used as abutment for a retainer
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