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Clinically Applicable Self-Healing Dental Resin Composites

Published online by Cambridge University Press:  05 February 2016

George Huyang  and
Jirun Sun
George Huyang*
Affiliation:
Dr. Anthony Volpe Research Center, American Dental Association Foundation, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899, USA
Jirun Sun
Affiliation:
Dr. Anthony Volpe Research Center, American Dental Association Foundation, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, MD 20899, USA
*
*(Email: shhu2628@uni.sydney.edu.au)
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Abstract

Self-healing is one of the most desired material properties. Herein, we present the design and development of a new self-healing dental composite (SHDC) that can heal micro-cracks autonomously. The SHDC has two functional components in addition to contemporary dental composites: healing powder (HP) and healing liquid (HL) encapsulated in silica microcapsules. The autonomous healing is triggered by micro-cracks which fracture microcapsules in their propagation path and release the HL. As a consequence, the released HL dissolves and reacts with the HP, and then fill the micro-cracks with a cement-like new material. This 3-step crack-release-heal process prevents micro-cracks from causing restoration failure, thus improving the service life of dental restorative material. The mechanical performance of the SHDC prepared were evaluated in terms of elastic modulus and fracture toughness, which were in the upper level compared to commercial dental restorative materials, and the self-healing capability was confirmed through fracture toughness recovery test. In addition, the SHDCs were made with clinically-tested, biocompatible materials, which makes them readily applicable as medical devices.

Keywords

biomimetic (assembly)compositemicrostructure
Type
Articles
Information
MRS Advances , Volume 1 , Issue 8: Biomaterials and Soft Materials , 2016 , pp. 547 - 552
Copyright
Copyright © Materials Research Society 2016 

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References

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