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Volume 32 , Issue 4
August 2012
Pages 431 (e135-e141)

A Three-Die Cast Technique for Duplicating Free Gingival Form in Zirconia Crowns: Two Case Reports

Takeshi Nozawa, DDS/Koji Tanaka, DDS, PhD/Shunzo Tsurumaki, CDT/Yasuhisa Ookame, DDS/Hiroaki Enomoto, DDS/Koichi Ito, DDS, MSD, PhD

PMID: 22577656
DOI: 10.11607/prd.00.1086

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. (Int J Periodontics Restorative Dent 2012;32:e135–e141.)

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