Clinical, Cosmetic and Investigational Dentistry
Open access peer-reviewed scientific and medical journals.
Dove Medical Press is now a member of the Open Access Initiative
An Author's Guide
A guide to help authors get their paper published.
Support Open Access and Dove Press
Promotional Article Monitoring - further details
Favored Author Program
Real benefits for authors, including fast-track processing of papers.
Marginal and internal fit of zirconia based fixed dental prostheses fabricated with different concepts
(7470) Total Article Views
Authors: Florian Beuer, Natalie Korczynski, Antonia Rezac, et al
Published Date February 2010
Volume 2010:2 Pages 5 - 11
Florian Beuer1, Natalie Korczynski1, Antonia Rezac1, Michael Naumann2, Wolfgang Gernet1, John A Sorensen3
1Department of Prosthodontics, Ludwig-Maximilians University, Munich, Germany; 2Department of Prosthodontics and Material Sciences, University of Ulm, Germany; 3Pacific Dental Institute, Portland, Oregon, USA
Abstract: The purpose of this in vitro study was to compare the precision of fit of substructures milled from semi-sintered zirconia blocks, fabricated with two different fabrication concepts. Three-unit, posterior fixed dental prostheses (FDP) were fabricated for standardized dies (n = 10) with the laboratory Computer Aided Design (CAD)/Computer Aided Manufacturing (CAM) system Cercon® Brain (Brain) and the centralized CAD/CAM system Compartis Integrated Systems (Compartis). After cementation to the dies, the FDP were embedded and sectioned. Four cross-sections were made of each abutment tooth, and marginal and internal fit were evaluated under an optical microscope. A one-way analysis of variance (ANOVA) was used to compare data (α = 0.05). Mean gap dimensions at the marginal opening for Brain and Compartis were 56.0 (±34.5) μm and 51.7 (±45.2) μm, respectively. Mean internal gap dimensions of 62.8 (±37.5) μm to 164.6 (±33.4) μm were measured depending on the measurement location and the fabrication concept. Mean marginal openings and internal adaptations were not significantly different for both systems. Three out of four measurement locations showed significantly different cement gaps. Within the limitations of this study, the results suggest that the accuracy of both investigated systems is satisfactory for clinical use. The laboratory fabrication exhibited similar accuracy as the centralized manufacturing.
Keywords: zirconia, CAD/CAM, fit, FDP, all-ceramic
Cannotea Citeulike Del.icio.us Facebook LinkedIn Twitter
Readers of this article also read:
"You do a tremendous job!!" Ruben Restrepo, University of Texas Health Science Center, San Antonio.
- Current practicality of nanotechnology in dentistry. Part 1: Focus on nanocomposite restoratives and biomimetics
- Bone resorption in incompletely impacted mandibular third molars and acute pericoronitis
- Radiolucency below the crown of mandibular horizontal incompletely impacted third molars and acute inflammation in men with diabetes
- Periosteoplasty for covering gingival recessions: Clinical results