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Intrafibrillar Mineralization of Collagen using a Liquid-Phase Mineral Precursor

Published online by Cambridge University Press:  15 February 2011

Matthew J. Olszta ,
Elliot P. Douglas  and
Laurie B. Gower
Matthew J. Olszta
Affiliation:
Dept. of Materials Science and Engineering, 212 Rhines Hall, Gainesville, FL, 32611
Elliot P. Douglas
Affiliation:
Dept. of Materials Science and Engineering, 212 Rhines Hall, Gainesville, FL, 32611
Laurie B. Gower
Affiliation:
Dept. of Materials Science and Engineering, 212 Rhines Hall, Gainesville, FL, 32611
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Abstract

Intrafibrillar mineralization of type-I collagen with hydroxyapatite (HA) is the basis of the complex biological composite known as bone, which from a material science perspective is a fascinating example of an interpenetrating bioceramic composite. Using a polymer-induced liquid-precursor (PILP) process, collagen substrates were highly infiltrated with a liquid-phase mineral precursor to calcium carbonate (CaCO3). At sections of partially mineralized collagen, banded mineral patterns were observed perpendicular to the collagen fibrils, while other fibrils were completely mineralized. An acid etch, used to preferentially remove superficial mineral, further revealed such banded patterns in fully mineralized samples. Removal of the collagen matrix with a dilute hypochlorite solution showed an interpenetrating mineral phase, with mineral disks that spanned the diameter of the pre-existing collagen fibrils, supporting our hypothesis that intrafibrillar mineralization can be achieved via capillary action applied to a liquid-phase mineral precursor.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 774: Symposium O – Materials Inspired by Biology , 2003 , O7.10
Copyright
Copyright © Materials Research Society 2003

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