These authors contributed equally to this study.
Minimally invasive mandibular bone augmentation using injectable hydrogels
Article first published online: 3 SEP 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Journal of Tissue Engineering and Regenerative Medicine
Volume 6, Issue S3, pages s15–s23, December 2012
How to Cite
Martínez-Sanz, E., Varghese, O. P., Kisiel, M., Engstrand, T., Reich, K. M., Bohner, M., Jonsson, K. B., Kohler, T., Müller, R., Ossipov, D. A. and Hilborn, J. (2012), Minimally invasive mandibular bone augmentation using injectable hydrogels. J Tissue Eng Regen Med, 6: s15–s23. doi: 10.1002/term.1593
- Issue published online: 17 DEC 2012
- Article first published online: 3 SEP 2012
- Manuscript Accepted: 10 JUL 2012
- Manuscript Revised: 20 MAR 2012
- Manuscript Received: 20 NOV 2011
- minimally invasive;
- bone tissue engineering;
- injectable hydrogel;
- rat animal model;
- hyaluronic acid;
- bone morphogenetic protein-2;
Hyaluronic acid-based hydrogels are proven biocompatible materials and excellent carriers of bone morphogenetic protein-2 (BMP-2) that have been successfully tested for bone generation in vivo. Different formulations, with or without nanohydroxyapatite, have shown promise for craniofacial applications. In this study, 28 rats were used to investigate whether it is possible to achieve mandibular bone augmentation upon injection of novel hyaluronic acid-based hydrogels containing nanohydroxyapatite and different concentrations of BMP-2 (0, 5 and 150 µg/ml). The biomaterials were injected subperiosteally through fine needles into the innate mandibular diastema, imitating a clinical procedure for resorbed mandibles. No incisions, flaps or sutures were necessary. After 8 weeks the mandibles were evaluated by peripheral quantitative computed tomography (pQCT), micro-computed tomography (μCT), histology, immunohistochemistry and fluorochrome labelling. As a result, engineered bone was observed in all treated mandibles, with a statistically significant increase in mandibular bone volume correlated with the amount of BMP-2 loaded in the hydrogel formula. We therefore demonstrated that minimally invasive mandibular bone augmentation is possible upon injection in rats, when using the appropriate injectable scaffolds. This represents an attractive clinical alternative for oral implantology patients. Copyright © 2012 John Wiley & Sons, Ltd.