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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 adaptation of full-coverage CAD/CAM restorations: in vitro study using a non-destructive method
1Odontostomatologic Clinic, Milan, Italy. eugenio.romeo@unimi.it
Minerva Stomatologica
|April 10, 2009
Summary
Computer-assisted design/manufactured (CAD/CAM) crowns demonstrate acceptable marginal fit for long-term dental restoration success. Veneering materials can impact adaptation, but CAD/CAM crowns offer a viable alternative to traditional methods.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Biomaterials Engineering
Background:
- Marginal fit of full-coverage crowns is critical for the longevity of dental restorations.
- Computer-assisted design/computer-assisted manufacturing (CAD/CAM) technologies offer potential for precise dental restorations.
Purpose of the Study:
- To evaluate the marginal adaptation of CAD/CAM crowns fabricated from different material combinations.
- To compare the marginal fit of CAD/CAM crowns on prepared teeth versus plaster dies.
Main Methods:
- Four material combinations (zirconia-ceramic, fiber-reinforced composite-composite, titanium-ceramic, titanium-composite) were tested.
- Five crowns per material were fabricated, and marginal gap values were measured at four points using digital imaging and software.
- Measurements were taken on prepared teeth and plaster dies, adhering to ADA Specification #8 guidelines.
Main Results:
- All tested CAD/CAM crown materials, except fiber-reinforced composite, exhibited marginal adaptation within the ADA specification limits (25-40 micrometers).
- The application of veneering materials generally decreased marginal adaptation, with fiber-reinforced composite being an exception.
Conclusions:
- CAD/CAM restorations produced using the DCS system demonstrate clinically acceptable marginal fit according to ADA Specification #8.
- Milled CAD/CAM crowns present a favorable alternative to conventional waxing-investing-casting techniques for dental restorations.
