title: Willi Glas Crowns eliminate the "blue gums" phenomenon.
authors.forename: H J
authors.initials: HJ
authors.lastname: Maier
mesh_terms: D002516:Ceramics; D003442:Crowns; D003776:Dental Porcelain; D003779:Denture Design; D005882:Gingival Diseases / Q000517:prevention & control*; D005898:Glass; D006801:Humans; D010859:Pigmentation Disorders / Q000517:prevention & control*
chemical_list: C047475:Dicor ceramic; D003776:Dental Porcelain