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Updated: Jun 16, 2026
05:30
Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
Published on: January 10, 2025
Slumping tendency and rheological properties of flowable composites
In-Bog Lee1, Sun-Hong Min, Sun-Young Kim
1Department of Conservative Dentistry and Dental Research Institute, Seoul National University, Yeongeon-Dong, Jongro-Ku, South Korea. inboglee@snu.ac.kr
Summary
A new method quantifies the slumping tendency of flowable resin composites using aspect ratio. This measurement correlates with rheological properties, aiding in evaluating clinical handling characteristics.
Area of Science:
- Dental Materials Science
- Polymer Rheology
- Biomaterials Engineering
Background:
- Flowable resin composites are widely used in dentistry.
- Their handling characteristics, including slumping tendency, influence clinical application.
- Standardized methods for assessing this property are needed.
Purpose of the Study:
- To develop a novel method for measuring the slumping tendency of flowable resin composites.
- To correlate this new method with established rheological measurements.
- To evaluate the clinical handling characteristics of these dental materials.
Main Methods:
- Five commercial flowable composites were tested.
- A custom device extruded composites onto a slide for slumping measurement (aspect ratio).
- Complex viscosity was measured using dynamic oscillatory shear rheometry.
Main Results:
- Slumping tendency varied significantly among the tested composites.
- Flowable composites demonstrated pseudoplastic behavior (viscosity decreased with frequency).
- Increased complex viscosity correlated with greater slumping resistance.
Conclusions:
- The aspect ratio method effectively quantifies the slumping tendency of flowable resin composites.
- This technique provides a reliable way to assess material handling.
- The findings support its potential application in evaluating clinical performance.
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