LOGIN
 
Share Page:
Back

Volume 17 , Issue 1
January/February 2004

Pages 59–64


Fit of a New Pressure-Sintered Zirconium Dioxide Coping

Pierluigi Coli, LDS, Odont Dr/PhD/Stig Karlsson, LDS, Odont Dr/PhD


PMID: 15008234

Purpose: The aim of this study was to determine in vitro the internal and marginal fit of zirconium dioxide ceramic copings manufactured using a recently introduced CAD/CAMbased technique (Denzir). Materials and Methods: Two master models were produced in metal, representing the maxillary right central incisor and first premolar. Two A-silicone impressions were used for each of the master models, and from each of the impressions five stone dies with the corresponding ceramic copings were produced, for a total of 20 copings. The A-silicone replica of the misfit of the ceramic coping to the corresponding stone die and master model was sectioned buccolingually and mesiodistally. The obtained sections were measured at occlusal, axial, and marginal locations under light microscopy. Twenty-four measurements for each replica were made. The Student’s ttest was used to detect significant differences between coping–stone die and coping–master model misfits. Results: For any combination, the marginal fit was superior to the axial and occlusal fit. In general, the misfit between the coping and the stone die did not differ significantly from the misfit detected between the coping and the master model. However, a better fit was recorded for the first premolar at the occlusal portion in the coping–stone die combination compared to the coping–master model combination. The mean marginal discrepancy between the copings and master models was clearly below 50 µm, with a range of 0 to 115 µm. Conclusion: The accuracy achieved by the Denzir manufacturing process for the production of zirconium dioxide copings is well within the range of clinical acceptability. Int J Prosthodont 2004;17:59–64.


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2017 Quintessence Publishing Co, Inc

IJP Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help