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Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

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Published on: July 21, 2014

Water sorption and diffusion coefficient through an experimental dental resin.

A M Costella¹, J L Trochmann, W S Oliveira

¹School of Chemical Engineering, State University of Campinas, UNICAMP, Campinas, SP, Brazil. costella@feq.unicamp.br

Journal of Materials Science. Materials in Medicine

|August 21, 2009

Summary

Researchers studied water absorption in dental resin composites to improve restorative materials. The study found a diffusion coefficient of 6.38 x 10(-8) cm(2)/s, suitable for dental applications.

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Area of Science:

Biomaterials Science
Polymer Chemistry
Dental Materials

Background:

Polymeric composites are crucial dental restorative materials.
Understanding their behavior in the oral environment is key to enhancing performance.
Water absorption significantly impacts the longevity and properties of dental resins.

Purpose of the Study:

To quantify water absorption in a novel dental resin blend.
To determine the diffusion coefficient of water within the resin composite.
To assess the suitability of the resin for dental restorative applications.

Main Methods:

Experimental dental resin blends were prepared using Bisphenol A glycol dimethacrylate, Bisphenol A ethoxylated dimethacrylate, and Triethylene glycol dimethacrylate monomers.
Specimen discs of varying thicknesses were subjected to water sorption testing.
The water sorption test followed the International Standard ISO 4049 guidelines for polymer-based filling materials.

Main Results:

The diffusion coefficient for water absorption was calculated to be approximately 6.38 x 10(-8) cm(2)/s.
The experimental variance was remarkably low, at 0.01%.
The obtained diffusion coefficient aligns well with established literature values for dental resins.

Conclusions:

The calculated diffusion coefficient indicates a high degree of suitability for the tested dental resin composite in restorative applications.
The findings contribute fundamental knowledge to the behavior of polymeric dental materials.
This research supports the development of improved and durable dental restorative solutions.