Full Metal Crown Restorations

Question 1

Indications for Full metal crown

Answer 1

• short clinical crowns
• high displacement forces are anticipated
• surveyed crown
• malocclusion
• FDP
• Endodontically treated tooth

Question 2

Contraindication for Full metal crown

Answer 2

• Active caries or periodontal disease
• Young patients, pulp exposure. Not critical as the PFM
• When a more conservative restoration is a reliable option
• when esthetics is an issue

Question 3

3 advantages to a full metal crown

Answer 3

• Strongest restoration - not only helps keeping tooth’s integrity but it doesn’t suffer from porcelain chipping
• Most conservative full coverage restoration
• permits correction of axial form (RDP)

Question 4

3 disadvantages of full metal crown

Answer 4

• increased removal of dental structure (compared to inlays/onlays)
• not an esthetic restoration
• Electric vitality tests can no longer be performed

Question 5

FMC posterior tooth prep reductions

Answer 5

Functional cusp = 1.5 mm
Non-functional cusp = 1 mm
Axial walls = 0.5 -1 mm

Question 6

What margin for FMC

Answer 6

0.5 mm light chamfer

Question 7

Occlusal bevel for FMC

Answer 7

1.5 mm on functional cusp

Question 8

Is margin supra or sub gingival

Answer 8

0.5 mm supragingival

Question 9

Reductions should follow the __ of the tooth your preparing

Answer 9

anatomy (axial walls and occlusal planes only)