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Computer-aided design/ computer-aided manufacturing crown survival rates.

¹Department of Dentistry, Illinois Masonic Medical Center, Chicago, Illinois, USA.

Evidence-Based Dentistry

|March 30, 2010

Summary

High-performance ceramic (HPC) crowns showed comparable survival rates to gold crowns in posterior restorations over 24 months. While suitable, Everest HPC crowns require further improvement in marginal fit for optimal clinical outcomes.

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Area of Science:

Dental Materials Science
Restorative Dentistry
Clinical Trials

Background:

This randomized controlled trial (RCT) evaluated the clinical performance of KaVo Everest high-performance ceramic (HPC) crowns compared to traditional gold crowns in posterior dental restorations.
A total of 224 patients were enrolled, receiving either HPC or gold crowns cemented with glass-ionomer cement.

Discussion:

Both crown types demonstrated similar long-term survival rates, with no statistically significant differences observed between KaVo Everest HPC and gold crowns over a 24-month period.
While KaVo Everest HPC crowns exhibited a slightly higher incidence of fractures and marginal discolouration, gold crowns showed a greater risk of vitality loss and secondary caries.
A notable finding was the imperfect marginal fit in a higher percentage of ceramic crowns compared to gold crowns, indicating an area for potential refinement in fabrication or preparation techniques.

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Key Insights:

KaVo Everest HPC crowns are a viable option for posterior restorations, demonstrating comparable efficacy to gold crowns in terms of survival and clinical complications.
The 1-year failure rates were low and similar for both groups (4.9% for HPC, 5.2% for gold).
The study highlights the need for optimizing marginal fit in ceramic crown fabrication to enhance long-term clinical success.

Outlook:

Further research focusing on improving the marginal adaptation of ceramic crowns could enhance their clinical performance and longevity.
Continued monitoring of these patient cohorts will provide valuable long-term data on the durability and success rates of both restorative materials.
Investigating alternative luting agents or cementation protocols for ceramic restorations may also yield improved outcomes.