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Updated: Dec 27, 2025
07:42
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
659
Mechanical performance of monolithic materials cemented to a dentin-like substrate.
Isabela S S L Weitzel1, João H R Rangel1, Magna P Perim1
1Graduate student, Department of Dentistry, University of Taubate (UNITAU), Taubate, Brazil.
The Journal of Prosthetic Dentistry
|February 25, 2020
Summary
This study evaluated four CAD-CAM materials bonded to a dentin-like substrate, finding feldspathic ceramic exhibited superior fatigue resistance. Mechanical properties varied significantly among the tested restorative materials.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Mechanical Engineering
Background:
- Limited studies exist on the mechanical behavior of restorative materials bonded to tooth structure.
- Understanding material properties and substrate bonding is crucial for dental restorations.
Purpose of the Study:
- To evaluate hardness, fracture toughness, load-to-failure, cyclic fatigue, and stress distribution of four CAD-CAM materials.
- To assess these properties when bonded to a dentin-like substrate (G10).
Main Methods:
- Four CAD-CAM materials (lithium disilicate, feldspathic ceramic, polymer-infiltrated ceramic, nanohybrid composite) were tested.
- Mechanical properties (hardness, fracture toughness, load-to-failure, cyclic fatigue) were measured after bonding to G10.
- Finite element analysis evaluated stress distribution under load.
Main Results:
- Lithium disilicate showed the highest hardness; lithium disilicate and nanohybrid composite had the highest fracture toughness.
- All tested materials, except nanohybrid composite, demonstrated comparable load-to-failure strengths.
- Feldspathic ceramic exhibited the best fatigue behavior with the lowest debonding rate and no catastrophic failures during cyclic loading.
Conclusions:
- Mechanical properties of CAD-CAM restorative materials differ significantly based on testing conditions and substrate bonding.
- Feldspathic ceramic demonstrated superior fatigue performance when bonded to a dentin-like substrate, suggesting its suitability for demanding clinical applications.
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