Related Experiment Video
Updated: Jul 8, 2026

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
Published on: July 21, 2014
Correlation of filler content and elastic properties of resin-composites
Konstantinos Masouras1, Nick Silikas, David C Watts
1Biomaterials Science Research Group, School of Dentistry, The University of Manchester, Manchester, UK.
Objectives:
The aim was to determine the Young's modulus (E), bulk modulus (B), shear modulus (G) and Poisson's ratio (nu) of a series of composite restorative materials and to correlate them with their filler volume-fractions.
Methods:
Twelve model resin-composite formulations, with systematically varied volume-fraction (Tokuyama), a flowable resin-composite (Point 4 flowable, Kerr) and two hybrid resin-composites (Filtek Supreme XT, 3M-Espe & X-tra Fil, Voco) were investigated. Twelve cylindrical specimens (5 mm x 6 mm) were prepared from each material. Six were free to expand radially under axial compressive loading, and were used to calculate the Young's modulus (E). The other six were radially constricted in a rigid stainless steel ring during loading, from which the bulk modulus (B) was calculated. Compression loading was performed at 1mm/min. The Young's and bulk moduli were determined using equations of elasticity. Poisson's ratio from nu=0.5-(E/6B) and shear modulus from G=E/2(1+nu).
Results:
Young's moduli ranged from 2.19 to 7.15GPa, bulk moduli from 12.79 to 22.43GPa and shear moduli from 0.74 to 2.47GPa. Poisson's ratio ranged from 0.45 for the stiffer to 0.47 for the more compliant composites. Statistically significant differences (ANOVA and Bonferroni at p=0.05) were found depending on filler volume-fraction.
Significance:
Elastic moduli varied significantly and a positive correlation existed between elastic moduli and filler volume-fraction (r2: 0.905-0.992 and 0.940-1.000 for Young's and bulk moduli, respectively).
More Related Videos
09:41Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes
Published on: May 17, 2018
09:54Measuring the Mechanical Properties of Glass Fiber Reinforcement Polymer Composite Laminates Obtained by Different Fabrication Processes
Published on: June 30, 2023
Related Concept Videos
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Bending of Members Made of Several Materials
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Members Made of Elastoplastic Material
As the bending moment...
Fiber Reinforced Concrete
Elasticity in Concrete
Additives and Fillers in Concrete
The...