Effect of Sintering on the Marginal and Internal Fit of CAD/CAM-fabricated Zirconia Frameworks

• KUNII Jun

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

• HOTTA Yasuhiro

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

• TAMAKI Yukimichi

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

• OZAWA Atushi

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

• KOBAYASHI Yukitaka

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

• FUJISHIMA Akihiro

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

• MIYAZAKI Takashi

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

• FUJIWARA Toshihisa

  Department of Oral Biomaterials and Technology, School of Dentistry, Showa University

Abstract

The aim of this study was to investigate the effect of post-machining sintering on marginal and internal fit of CAD/CAM-fabricated zirconia frameworks. Single crown copings (A: abutment), three-unit bridge frameworks (APA, P: pontic), four-unit bridge frameworks (APPA), and five-unit bridge frameworks (A₁P₁A₂P₂A₃) were fabricated with raw-stage zirconia blanks using a commercial CAD/CAM system (KATANA®, Noritake Dental Supply Co. Ltd., Aichi, Japan). Crown copings and frameworks were cemented to their respective master abutment models, and thickness of the cement layer was measured at specific measuring points. Marginal and internal fit of both APA and APPA were within clinical acceptance. However, the marginal gap and thickness of the cement layer on the axial surface of the pontic side of APA and APPA were slightly higher than those of the non-pontic side. As for the marginal gap of A₁P₁A₂P₂A₃ framework, it was superior to those of APA and APPA because the center abutment supported the framework to prevent distortion.

Journal

• Dental Materials Journal

  Dental Materials Journal 26 (6), 820-826, 2007

  The Japanese Society for Dental Materials and Devices

Keywords

• Zirconia ceramics
• CAD/CAM system
• Framework

Details

• CRID: 1390001204716028416
• NII Article ID: 110006557232
• NII Book ID: AA10443149
• DOI: 10.4012/dmj.26.820
• COI: 1:CAS:528:DC%2BD1cXitVOgsr4%3D
• ISSN: 18811361
• ISSN: 02874547
• PubMed: 18203487
• Web Site: https://www.jstage.jst.go.jp/article/dmj/26/6/26_6_820/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10745095
• Web Site: https://search.jamas.or.jp/link/ui/2008201039
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • NDL-Digital
  • CiNii Articles
• Abstract License Flag: Disallowed