Related Experiment Video
Updated: Apr 28, 2026

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
Published on: July 21, 2014
Effect of thickness of bonded composite resin on compressive strength
Jorien T Hamburger1, Niek J M Opdam1, Ewald M Bronkhorst1
1Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, Philips van Leydenlaan 25, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands.
Objective:
The aim of this study was to investigate the compressive strength of composites with different physical properties bonded as a restoration to dentin in layers of varying thicknesses.
Methods:
Four types of direct composite materials: a midway-filled (Tetric EvoCeram); a compact-filled (Clearfil AP-X); a nano-filled (Filtek Supreme); and a micro-filled material (Heliomolar) were bonded in 0.5-3.0mm thick layers onto bovine dentin. Each material group contained 25 samples, which were loaded until fracture.
Results:
The nano-filled and the compact filled material showed a significant association between layer thickness and compressive strength. The midway-filled composite was the most consistent material showing similar failure load over the complete thickness range.
Conclusion:
A clear influence of layer thickness on compressive strength was found in some composite resin materials. When restorations are placed that are heavily loaded, such as in patients with severe wear due to bruxism it may be advisable to choose a material that is adequately strong in all thicknesses.
More Related Videos
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
09:54Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process
Published on: June 30, 2023
Related Concept Videos
Bonding and Strength of Aggregate
Relation Between Tensile Strength and Compressive Strength of Concrete
Strength of Cement
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
Tensile Strength Considerations of Concrete
The dimensions and shape of a concrete specimen...
Behavior of Concrete Under Compressive Load
As the concrete specimen fractures under...
Impact Strength of Concrete