title: A three-die cast technique for duplicating free gingival form in zirconia crowns: two case reports.
abstract: This report describes a duplication technique of free gingival form from a provisional restoration to a zirconia crown. Three die casts were manufactured from a silicone impression with an acrylic resin ring tray. The first die cast was for the zirconia framework, the second for the provisionalized transfer coping, and the third for relining the provisional restoration. A free gingival impression was taken using a provisionalized transfer coping, and a soft gingival cast was manufactured. The depth of free gingival transparency was measured using a zirconia shade plate. Then, the zirconia framework was customized to allow for subgingival porcelain space. This technique seems to contribute to the clinical-laboratory interface in computer-aided design/computer-assisted manufacture restorations.
authors.affiliation: nozawa.perio.implant@world.ocn.ne.jp
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nozawa
authors.forename: Koji
authors.initials: K
authors.lastname: Tanaka
authors.forename: Shunzo
authors.initials: S
authors.lastname: Tsurumaki
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Ookame
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Enomoto
authors.forename: Koichi
authors.initials: K
authors.lastname: Ito
mesh_terms: D017076:Computer-Aided Design; D003442:Crowns; D003481:Cuspid; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D003794:Dental Restoration, Temporary; D005260:Female; D005881:Gingiva / Q000033:anatomy & histology*; D060745:Gingival Retraction Techniques; D005891:Gingivitis / Q000517:prevention & control; D006801:Humans; D007180:Incisor; D008875:Middle Aged; D003765:Models, Dental; D011145:Polyvinyls / Q000737:chemistry; D017797:Prosthesis Coloring; D012833:Siloxanes / Q000737:chemistry; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
chemical_list: D003760:Dental Impression Materials; D003764:Dental Materials; D011145:Polyvinyls; D012833:Siloxanes; C480691:aquasil; D003776:Dental Porcelain; D015040:Zirconium; C028541:zirconium oxide