Inter-Relationship Between the Periodontium and Contours of Artificial Crowns - a Review

Abstract

The subject of axial contour of artificial crowns has and continues to be highly controversial. Much of the controversy centers around whether the gingival sulcus is really in need of protection from buccal and/or lingual convexities, or whether a flatter emergence profile affords "self-cleansing" muscle action. Evidence is reviewed in this part which suggests that overcontouring is probably more detrimental to gingival health than undercontouring. The critical role played by proper tooth reduction in attaining correct axial contour is shown and a rationale presented for the important interplay between preparation design, properties of the restorative materials to be employed, and physiologic contour.