Cervical crown margin imperfections and location of the margin relative to the gingival crest.
D003442:Crowns / Q000592:standards*; D003731:Dental Caries / Q000517:prevention & control; D003737:Dental Cavity Preparation / Q000592:standards; D003773:Dental Plaque / Q000517:prevention & control; D005882:Gingival Diseases / Q000517:prevention & control; D014070:Tooth / Q000648:ultrastructure