Peritubular Dentin Lacks Piezoelectricity

Habelitz, S.; Rodriguez, B. J.; Marshall, S. J.; Marshall, G. W.; Kalinin, S. V.; Gruverman, A.

doi:10.1177/154405910708600920

Peritubular Dentin Lacks Piezoelectricity

Journal Article · Sat Sep 01 04:00:00 EDT 2007 · Journal of Dental Research

DOI:https://doi.org/10.1177/154405910708600920· OSTI ID:1364242

Habelitz, S. ^[1]; Rodriguez, B. J. ^[2]; Marshall, S. J. ^[1]; Marshall, G. W. ^[1]; Kalinin, S. V. ^[1]; Gruverman, A. ^[3]

Univ. of California, San Francisco, CA (United States). Dept of Preventative and Restorative Dental Sciences
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Condensed Matter Sciences Division
North Carolina State Univ., Raleigh, NC (United States). Dept. of Materials Science and Engineering and Physics

Dentin is a mesenchymal tissue, and, as such, is based on a collagenous matrix that is reinforced by apatite mineral. Collagen fibrils show piezoelectricity, a phenomenon that is used by piezoresponse force microscopy (PFM) to obtain high-resolution images. Here, we applied PFM to image human dentin with 10-nm resolution, and to test the hypothesis that zones of piezoactivity, indicating the presence of collagen fibrils, can be distinguished in dentin. Piezoelectricity was observed by PFM in the dentin intertubular matrix, while the peritubular dentin remained without response. High-resolution imaging of chemically treated intertubular dentin attributed the piezoelectric effect to individual collagen fibrils that differed in the signal strength, depending on the fibril orientation. Our study supports the hypothesis that peritubular dentin is a non-collagenous tissue and is thus an exception among mineralized tissues that derive from the mesenchyme.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1364242

Journal Information:: Journal of Dental Research, Journal Name: Journal of Dental Research Journal Issue: 9 Vol. 86; ISSN 0022-0345

Publisher:: SAGE

Country of Publication:: United States

Language:: English

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