title: Clinical marginal gap of porcelain fused to electro-formed gold coping crowns.
abstract: This study evaluated the marginal and internal gaps of Auro Galvano Crowns (AGC) in vivo. One hundred AGC crowns were examined using white and black silicone materials; the thickness of the silicone layer was measured at 16 reference points using a microscope. The mean marginal gaps among anterior, premolar and molar teeth, and the mean gaps within the groups were compared by analysis of variance and Dunnett T3 test. The results showed that at the margins, there were no significant differences among the four measuring points within each group, and there were no significant differences in the mean marginal gaps among the three groups. The mean marginal gaps in all groups were within the limits of clinical acceptability.
authors.affiliation: Department of Fixed Prosthodontics, School of Dental Medicine, Tsurumi University, Yokohama City, Japan. kokubo-y@tsurumi-u.ac.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kokubo
authors.forename: Mitsuyoshi
authors.initials: M
authors.lastname: Tsumita
authors.forename: Chikahiro
authors.initials: C
authors.lastname: Ohkubo
authors.forename: Per
authors.initials: P
authors.lastname: Vult von Steyern
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Murata
authors.forename: Shunji
authors.initials: S
authors.lastname: Fukuhsima
mesh_terms: D000704:Analysis of Variance; D003442:Crowns; D000044:Dental Abutments; D003735:Dental Casting Technique; D018772:Dental Marginal Adaptation; D017267:Dental Prosthesis Design; D005260:Female; D006047:Gold Alloys; D006801:Humans; D008297:Male; D016876:Metal Ceramic Alloys
chemical_list: D006047:Gold Alloys; D016876:Metal Ceramic Alloys