Related Experiment Video
Updated: Feb 27, 2026

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
Published on: January 10, 2025
Assessment of compressive and flexural properties of three contemporary bulk fill resin composites
Norma Borja-Farfán1, Danilo Loyola-Livias1, Leslie Casas-Apayco2
1Universidad Peruana de Ciencias Aplicadas, Carrera de Odontología, Lima, Perú.
Introduction:
Contemporary restorative materials must demonstrate how much stress they can withstand before permanently deforming under the constant forces generated during chewing.
Aim:
To compare the compressive and flexural strength of three bulk fill resin composites.
Materials And Method:
This study analyzed three bulk fill resin composites: Opus™ bulk fill (OBF), Tetric® N-Ceram bulk fill (TNC), and Filtek™ bulk fill (FBF), and one conventional resin composite: Filtek™ Z350XT (FZXT) as a control group. Each composite was used to prepare 14 cylindrical specimens (n=56) for compressive strength tests, and 19 rectangular specimens (n=76) for flexural strength tests. Mechanical tests were performed using an Instron® universal testing machine - 100 kN load at a speed of 1 mm/1min.
Results:
Descriptive (Mean ± SD) and inferential statistics (Kruskal-Wallis test/ post-hoc test), p<0.05 were used. The compressive test results (Means ± SD) were: OBF (141.68MPa ± 22.20), TNC (139.03MPa ± 23.56), FBF (235.59MPa ± 26.08), and FZXT (99.28MPa ± 11.36). The flexural test results (Means ± SD) were: OBF (116.29 ± 7.20), TNCBF (109.67MPa ± 7.58), FBF (200.53MPa ± 10.32), and FZXT (90.08MPa ± 8.63). Statistically significant differences were found between the resin composites (p<0.001) in both mechanical tests.
Conclusions:
The bulk fill resin composites demonstrated higher compressive and flexural strength than the conventional resin composite. However, the use of these restorative materials may depend on specific clinical requirements and material handling preferences.
More Related Videos
Related Concept Videos
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...
Behavior of Concrete Under Compressive Load
As the concrete specimen fractures under...
Flexural Stress
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to its distance...
Fiber Reinforced Concrete
Tensile Strength Considerations of Concrete
The dimensions and shape of a concrete specimen...
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...

