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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
A novel polymer infiltrated ceramic dental material
1Sir John Walsh Research Institute, School of Dentistry, University of Otago, Dunedin, New Zealand. lihong.he@otago.ac.nz
Summary
This study evaluated a new polymer-infiltrated ceramic material for dental applications. The material shows promising mechanical properties, including hardness and fracture toughness, similar to human enamel.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Ceramic Science
Background:
- Development of advanced dental restorative materials is ongoing.
- Polymer-infiltrated ceramics offer a combination of ceramic strength and polymer flexibility.
- Optimizing mechanical properties is crucial for clinical success in dental CAD/CAM applications.
Purpose of the Study:
- To characterize the mechanical behavior of a novel porous ceramic interpenetrating polymer-ceramic composite.
- To assess the suitability of this material for dental restorative applications.
Main Methods:
- Nanoindentation was used to measure elastic modulus, hardness, stress-strain response, and indentation creep.
- Fracture toughness was determined using the single-edge-notched beam (SENB) method.
- Scanning Electron Microscopy (SEM) was utilized for fracture surface analysis.
Main Results:
- The material exhibited an elastic modulus of 30.14 GPa, hardness of 2.59 GPa, and fracture toughness of 1.72 MPam(1/2).
- A significant indentation size effect was observed for elastic modulus and hardness.
- Indentation creep behavior was comparable to human enamel.
Conclusions:
- The evaluated polymer-infiltrated ceramic material demonstrates favorable mechanical properties for dental use.
- Manufacturing parameters, including ceramic porosity and processing pressure, significantly impact material properties.
- This material is a potential candidate for the dental CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing) system.
