The preparation technique is important for the stability of the restoration as well as for the aesthetic result and the accuracy.
Clear margins are a prerequisite for an accurate restoration.
Gingival margins can be prepared with a deep chamfer or a shoulder. Margins should be sharp, but all internal features, whether positive or negative, should be rounded. Crowns Reduce anatomically. Provide 1.5 mm in fissure areas and the occlusal third of the axial walls. Smooth all transitions.