Class V Amalgam Tooth Preparations Flashcards
1
Q
What is usually the 1st choice of restoration for class V?
A
Composites…
2
Q
What is the most difficult aspect of Class V preps?
A
retention!
3
Q
What shape is the amalgam outline form?
A
Similar to the composite class V prep, but more trapezoidal.
4
Q
What shape should the axial wall make?
A
It should follow the curvature of the DEJ: deeper at the occlusal edge and more shallow at the gingival edge.
5
Q
How deep should the axial wall be placed? Why?
A
Minimum of 1.0 mm deep - at least 0.5mm into the dentin.
This deep into the dentin allows the placement of necessary retention grooves without undermining enamel.
6
Q
How deep should the retention grooves be?
A
1/4 mm deep at the occluo-incisoaxial and gingivoaxial line angles. Do NOT undermine the enamel!
