ORAL HEALTH EVIDENCE-BASED PRACTICE PROGRAM
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Title Survival Rate of Metal-Ceramic Crowns as Opposed to a Zirconia-Ceramic Crown
Clinical Question For a patient seeking a crown, would a zirconia-ceramic based crown or a metal-ceramic based crown have a higher survival rate?
Clinical Bottom Line Although there is no statistical difference in survival rates between zirconia-ceramic based crowns and metal-ceramic crowns, the zirconia-ceramic crowns are more likely to have minor fractures on the veneering surface than metal-ceramic crowns.
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 22339945Vigolo/201260 patients needing fixed dental prostheses RCT
Key resultsOf the 60 patients that participated in this study, the survival rate for those that received metal-ceramic crowns was 95%. Those that received a Procera crown had a survival rate of 79% and those that received the Lava crowns had a survival rate of 85%. The study was conducted over a period of 5 years. No statistical difference was observed between a metal-ceramic crown and a zirconia-ceramic crown. However, Procera did show a statistical difference in the frequency of failures when compared to the control group.
Evidence Search (zirconia-ceramic[All Fields] AND metal-ceramic[All Fields]) AND Clinical Trial[ptyp]
Comments on
The Evidence
This was a double-blinded RCT with more than an 80% completion rate. The groups were treated the same and received adequate follow-up. Recall bias is unlikely with little completing interests. The survival rate was judge based upon coping fracture, veneering fracture, occlusal wear, marginal adaptation, and anatomical form.
Applicability This study is highly applicable for a patient considering a single-unit FPD.
Specialty/Discipline (General Dentistry) (Prosthodontics)
Keywords Crowns, Zirconia, Metal-Ceramic
ID# 2469
Date of submission: 03/08/2013spacer
E-mail k.patel729@gmail.com; patelk6@livemail.uthscsa.edu
Author Kuntal Patel
Co-author(s)
Co-author(s) e-mail
Faculty mentor/Co-author Erica Teixeira, DDS, PhD
Faculty mentor/Co-author e-mail teixeirae@uthscsa.edu
Basic Science Rationale
(Mechanisms that may account for and/or explain the clinical question, i.e. is the answer to the clinical question consistent with basic biological, physical and/or behavioral science principles, laws and research?)
post a rationale
None available
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Comments on the CAT
(FOR PRACTICING DENTISTS' and/or FACULTY COMMENTS ON PUBLISHED CATs)
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None available
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