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Updated: Jul 7, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
The elastic moduli across various types of resin/dentin interfaces
Pong Pongprueksa1, Watcharaporn Kuphasuk, Pisol Senawongse
1Department of Operative Dentistry, Faculty of Dentistry, Mahidol University, 6 Yothi Street, Phayathai, Bangkok 10400, Thailand. dtppp@mahidol.ac.th
The filled adhesive resin did not improve the hybrid layer's elastic modulus. However, the filled adhesive resin itself showed a higher elastic modulus than the unfilled version, impacting dental composite restorations.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Polymer Chemistry
Background:
- Dental adhesives are crucial for composite restoration longevity.
- Understanding adhesive elastic moduli is key to predicting restoration performance.
- The use of low-viscosity resins as elastic cavity walls is an evolving technique.
Purpose of the Study:
- To compare the elastic moduli of unfilled and filled adhesive resins.
- To evaluate the influence of a low-viscosity resin (LVR) as an elastic cavity wall.
- To assess these factors in class V composite restorations using a hybrid resin composite.
Main Methods:
- Class V cavities prepared in premolars.
- Lined with unfilled/filled adhesives, with/without LVR (Filtek Flow).
- Restored with hybrid resin composite (Z250) and tested via nano-indentation.
Main Results:
- Dentin: 25,111 MPa; Hybrid Layer (unfilled): 12,243 MPa; Hybrid Layer (filled): 11,765 MPa.
- Adhesives: Unfilled (7595 MPa) < Filled (8430 MPa).
- LVR (Filtek Flow): 13,543 MPa; Composite (Z250): 24,494 MPa. Significant differences (p<0.05) among layers.
Conclusions:
- Filled adhesive did not enhance the hybrid layer's elastic modulus compared to unfilled.
- Filled adhesive resin exhibited a significantly higher elastic modulus than unfilled adhesive resin.
- Elastic moduli varied significantly across different layers within the restoration.
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