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ORIGINAL RESEARCH article

Front. Dent. Med
Sec. Dental Materials
Volume 5 - 2024 | doi: 10.3389/fdmed.2024.1423461
This article is part of the Research Topic Next-Generation Dental Materials Engineered for Mineralized Tissue Reconstruction: Advances, Challenges and Opportunities View all 5 articles

Scale Dependent Nanomechanical Properties of Dentin Adhesive and Adhesive-Collagen Composite

Provisionally accepted
Viraj Singh Viraj Singh 1Ranganathan Parthasarathy Ranganathan Parthasarathy 2Qiang Ye Qiang Ye 3Paulette Spencer Paulette Spencer 4*Anil Misra Anil Misra 5*
  • 1 SLB, Sugar Land, Texas, United States
  • 2 Tennessee State University, Nashville, Tennessee, United States
  • 3 Canon Virginia, Inc., Newport News, Virginia, United States
  • 4 University of Kansas, Lawrence, Kansas, United States
  • 5 Florida International University, Miami, United States

The final, formatted version of the article will be published soon.

    The complex micrometer construct at the interface that joins the composite material to the tooth surface in restorative dentistry is composed of the composite formed by infiltrating adhesive into demineralized dentin (collagen matrix). The overall performance of composite restorations is therefore directly linked to the properties of the polymerized adhesive and adhesive-collagen composite. Nanoindentation and nanoDMA tests are performed on model methacrylate based adhesive and collagen-adhesive composite to study their mechanical properties. The adhesive collagen composite is prepared by the infiltration of dentin adhesive into a completely demineralized bovine dentin. The obtained experimental results show that both the neat adhesive and the collagen-adhesive composite are heterogeneous materials at the spatial scales of property interrogation. It is also found that the reduced elastic modulus generally decreases with increasing indentation contact depth reaching an asymptote for both neat adhesive and collagen-adhesive composite. This reduced modulus behavior can be attributed to the increase in the indentation interaction volume. In addition, the measured frequency dependent storage and loss moduli indicate that both the neat adhesive and collagen adhesive composites are viscoelastic materials which are likely to exhibit creep deformation and rate-dependent behavior in physiological function.

    Keywords: collagen-adhesive composite, Dentin adhesive, nanoindentation, NanoDMA, Depth dependent, Elastic Modulus, viscoelastic. (Min

    Received: 25 Apr 2024; Accepted: 07 Nov 2024.

    Copyright: © 2024 Singh, Parthasarathy, Ye, Spencer and Misra. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Paulette Spencer, University of Kansas, Lawrence, 66045, Kansas, United States
    Anil Misra, Florida International University, Miami, United States

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.