Full Gold Crown

Question 1

Summary of FGC prep?

Answer 1

Occlusal reduction 3 planes - 1.0mm
Axial reduction lingual wall -1.0mm
Proximal breakthrough
Finishing TC

Question 2

How to carry out occlusal reduction?

Answer 2

Reduce in 3 planes
Place tip of bur in central fossa then make depth grooves (place buccal and lingual)
Joint depth grooves - follow morphology
Prep should be in dentine

Question 3

What should be completed after occlusal reduction?

Answer 3

Functional cusp reduction

Question 4

How should the buccal wall be prepared?

Answer 4

Use chamfer bur
Reduce wall by 1mm - 2 planes
Watch tip for even reduction - don’t want V shaped margins

Question 5

How should lingual aspect be prepared?

Answer 5

Reduce by 1mm

Create 5-10 degree taper with buccal wall

Question 6

How to carry out mesial/ distal reduction?

Answer 6

Paint brush strokes to break through contact - allows adequate thickness of material

Question 7

How to complete FGC prep?

Answer 7

Use TC bur to refine margin and polish

Well defined margins aid technician in lab

Question 8

How would proceed is caries present?

Answer 8

Margins must be on sound tissue
Extend margin further down- must maintain chamfer
If prep prepared into furcation - will have clover shape