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In vitro evaluation of CAD/CAM composite materials
Ioannis Papathanasiou1, Phophi Kamposiora1, Konstantinos Dimitriadis2
1Department of Prosthodontics, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece.
Journal of Dentistry
|July 17, 2023
Summary
This study evaluated computer-aided-design/computer-aided manufacturing (CAD/CAM) resin based composite (RBC) materials. Grandio Blocs and Lava Ultimate showed superior mechanical properties, suggesting better clinical performance for RBCs with higher filler content.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- Computer-aided-design/computer-aided manufacturing (CAD/CAM) resin-based composites (RBCs) are increasingly used in restorative dentistry.
- Understanding their microstructural, elemental, and mechanical properties is crucial for predicting clinical performance.
Purpose of the Study:
- To evaluate and compare the microstructural, elemental, and mechanical properties of contemporary CAD/CAM RBC materials.
- To determine differences in hardness, elastic modulus, and creep among these materials.
Main Methods:
- Six different CAD/CAM RBC materials were tested using Instrumented Indentation Testing (IIT).
- Mechanical properties including Martens Hardness (HM), Indentation Elastic Modulus (EIT), Elastic index (ηIT), and Creep index (CIT) were measured.
- Microstructure and elemental composition were analyzed using Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDX).
Main Results:
- Significant differences were found in all tested mechanical properties and elemental composition among the CAD/CAM RBC materials.
- Grandio Blocs exhibited the highest Martens Hardness, Vickers Hardness (HV), and Indentation Elastic Modulus.
- Cerasmart showed the highest creep index, while Grandio Blocs and Lava Ultimate had the lowest.
Conclusions:
- Contemporary CAD/CAM RBC materials exhibit distinct microstructural, elemental, and mechanical profiles.
- Materials with higher filler loading demonstrated a more favorable combination of hardness, elastic modulus, and creep, indicating potential for improved clinical longevity under intraoral stress.
