LOGIN
 
Share Page:
Back

Volume 17 , Issue 4
July/August 2004

Pages 469–475


Clinical Performance of a Lithia Disilicate–Based Core Ceramic for Three-Unit Posterior FPDs

Josephine F. Esquivel-Upshaw, DMD, MS/Kenneth J. Anusavice, PhD, DMD/Henry Young, DDS/Jack Jones, DMDd/Charles Gibbs, PhD


PMID: 15382785

Purpose:The purpose of this research project was to determine the clinical success rate of a lithia disilicate–based core ceramic for use in posterior fixed partial dentures (FPD) as a function of bite force, cement type, connector height, and connector width. Materials and Methods:Thirty ceramic FPD core frameworks were prepared using a heat-pressing technique and a lithia disilicate–based core ceramic. The maximum clenching force was measured for each patient prior to tooth preparation. Connector height and width were measured for each FPD. Patients were recalled yearly after cementation for 2 years and evaluated using 11 clinical criteria. All FPDs were examined by two independent clinicians, and rankings from 1 to 4 were made for each criterion (4 = excellent; 1 = unacceptable). Results:Two of the 30 ceramic FPDs fractured within the 2-year evaluation period, representing a 93% success rate. One fracture was associated with a low occlusal force and short connector height (2.9 mm). The other fracture was associated with the greatest occlusal force (1,031 N) and adequate connector height. All criteria were ranked good to excellent during the 2-year recall for all remaining FPDs. Conclusion:The performance of the experimental core ceramic in posterior FPDs was promising, with only a 7% fracture rate after 2 years. Because of the limited sample size, it is not possible to identify the maximum clenching force that is allowable to prevent fracture caused by interocclusal forces. Int J Prosthodont 2004;17:469–475.


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