Stainless Steel Crown

Question 1

What are the major advantages of stainless steel crowns?

Answer 1

• Longevity
• Reliability
• Total seal

Question 2

What are the indications for use of stainless steel crowns?

Answer 2

-Dental age, long time to exfoliation
-Caries lesion of any size if Caries risk
high
-Extent of caries both within the tooth or individual
(significant extent)
Pulp treatment
Developmental defects (e.g. enamel hypoplasia
-Behaviour
+ Motivation of parent or child (can they come in often, ohi, diet)

Question 3

What is usually used to cement crowns?

Answer 3

-GIC

Question 4

What are the burs and dimensions used for a stainless steel crown prep?

Answer 4

-Occlusal: 1-1.5mm (HS diamond football/large round/ wheel bur)

(Round angle between occlusal and buccal/lingual surfaces)

(Remove any remaining caries with slow speed 4 or 6)

-Proximal: 1mm (L10)–> should be flush surface rather than having a typical shoulder/chamfer; basically a feather edge

(Round junction between interproximal and lingual/buccal)

• Lingual + buccal surface: 0mm (do NOT reduce)
• Check crown fit, adjust with crimper or crown former pliers

Question 5

What instrument can be used to determine if interproximal reduction is sufficient?

Answer 5

-A probe should be able to be passed through CT

Question 6

Where should crown margin be located?

Answer 6

1mm subgingivally

Question 7

What can be used to alter crown shape?

Answer 7

• Crimper: gingival area
• Squeezing: mesio-distal reduction in diameter
• Crown scissors or slow speed green stone

Question 8

What should you check for before starting crown preps?

Answer 8

-Occlusal height of marginal ridges: crown should imitate this