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Published on: December 20, 2024
A retrospective analysis of 102 zirconia single crowns with knife-edge margins
Carlo E Poggio1, Riccardo Dosoli, Carlo Ercoli
1Eastman Institute for Oral Health, School of Medicine and Dentistry, University of Rochester, Rochester, NY 14620, USA. Carlo_Poggio@URMC.Rochester.edu
Statement Of Problem:
Clinical reports of feldspathic porcelain veneered-zirconia crowns placed on teeth with knife-edge marginal finish lines have recently been presented but with data available for only a limited number of crowns in the anterior maxilla.
Purpose:
This retrospective study evaluated the clinical success and survival of feldspathic porcelain veneered-zirconia crowns fabricated with knife-edge margins in a private practice.
Material And Methods:
One hundred and two teeth (51 anterior, 51 posterior) were prepared with knife-edge margins and restored with feldspathic porcelain veneered-zirconia crowns. The modified California Dental Association (CDA) criteria were used to clinically evaluate subjects recalled between May and December 2010. Data were analyzed with descriptive statistics.
Results:
The mean follow-up time was 20.9 months (SD, 13.6; range, 10-72). One tooth had to be extracted because of an endodontic problem not related with the restoration, 2 crowns had minor chipping of the veneering porcelain, while no crowns exhibited fracture of the zirconia core.
Conclusions:
In this retrospective evaluation, feldspathic porcelain veneered-zirconia crowns with knife-edge margins provided clinical performance similar to that reported with other margin designs.