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Updated: Jun 25, 2026
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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Marginal integrity of CAD/CAM fixed partial dentures
Martin Rosentritt1, Michael Behr, Carola Kolbeck
1Engineer, Department of Prosthetic Dentistry, University Clinics, Regensburg, Germany.
European Journal of Dentistry
|February 13, 2009
Summary
The choice of cement system is crucial for the marginal integrity of zirconia fixed partial dentures (FPDs). Several resin cements demonstrated good to sufficient marginal adaptation and low microleakage in this study.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Computer-aided design and manufacturing (CAD/CAM) enables zirconia fixed partial dentures (FPDs).
- Bonding to inert zirconia (ZrO2) surfaces can challenge marginal integrity.
- Evaluating cement systems is vital for FPD clinical success.
Purpose of the Study:
- To assess the marginal adaptation of zirconia FPDs.
- To investigate interfaces between zirconia, cement, and tooth structures.
- To compare different resin cement systems for zirconia FPDs.
Main Methods:
- Fabrication of 32 3-unit Y-TZP zirconia FPDs using CAD/CAM.
- Luting FPDs with four resin cement systems and two control groups.
- Marginal adaptation evaluation via scanning electron microscopy (SEM) before and after artificial aging.
- Microleakage testing using fuchsine solution.
Main Results:
- Most cement systems exhibited ≥95% perfect margin before and after aging.
- Variolink2/Syntac showed <70% perfect margin.
- Microleakage was generally <20%, with exceptions for specific material combinations.
Conclusions:
- Adhesive cementation success for zirconia FPDs is cement system-dependent.
- Panavia/ED, Compolute/EBS, and RelyX Unicem showed good to sufficient marginal integrity.
- Material selection is key for durable zirconia FPD restorations.
