Full Gold Crown

Question 0

What pre-operative considerations should be carried out prior to placing a FGC?

Answer 0

1) Assess need for core
2) Assess need for indirect post retention
3) Periodontal management - electrosurgery to relocate crown margins supragingivally
4) Occluusal adjustments to correctt overerupted opposing teeth
5) ORhtodontics to move tilted bridge abutments to a more favourable alingnment

Question 1

What are the inddications for a FGC?

Answer 1

1) Protection of remaining ccoronal tissue in broken down, heavily filled posterior teethh following root filling, caries, fractures and occlusal wear where a direct amalgam or CR is deemed inappropriate
2) A reatiner for fixed bridgework for protecting or reeshaping a removable partiial denture abutment
3) Splinting periodontally mobile posterior teeth??
4) Elimination of occlusal interferences by re-contouring tilted molars
5) Insufficient interocclusal distance for a PBM or PBZ.

Question 2

What are the steps and reductions involved with a FGC?

Answer 2

Occlusal reductions: 
1.0mm non-functional cusp
1.5mm functional cusp
Buccal reducctionn:
1.0mm midbuccal to a 0.5 chamfer margin
Proximal:
1.0mm at marginal ridge to a 0.5mm chamfer margin
Lingual:
0.8mm in occlusal third to a 0.5mmm chamfer margin

Question 3

If the prep is oovertapered, what can be done for additional rettention?

Answer 3

Pins, slots, prox boxes, ‘hot cross bun’ occlusal slot

Question 4

What kind of gold alloy is used for FGCs?

Answer 4

Type 3 (60-70% gold)

Question 5

What are the disadvantages with using a FGC?

Answer 5

1) Extensive removal of tooth
2) Not aesthetic
3) Pulp ttesting difficult
4) Iatrogenic damage
5) Galvanic current