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The optimal carrier for BMP-2: a comparison of collagen versus fibrin matrix

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Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Introduction

The aim of our study was to investigate in vitro and in a new in vivo rat model for impaired bone healing whether a low dose BMP-2 preparation in fibrin would be equivalent or better than the combination of collagen and a high dose of BMP-2 which is currently in clinical use.

Materials and methods

In a 14 day period we compared the in vitro release kinetics of an absorbable collagen sponge (ACS) with 72 μg rhBMP-2 in the BMPC group and fibrin matrix with 10 μg rhBMP-2 in the BMPF group. In our in vivo experiment a critical sized osteotomy was performed in the rat femur, which was filled with a spacer, inhibiting bone formation for a period of 4 weeks. In a second operation this spacer was removed and the test item was applied into the defect. We compared the BMPF and BMPC groups with the ACS alone, FIBRIN alone and the EMPTY (4w/8w) control groups. 4 and 8 weeks after the second operation, specimens were analysed by X-ray and μCT imaging. Mechanically stable femurs were biomechanically evaluated.

Results

Cumulative BMP-2 release was five times higher in the BMPF group than in the BMPC group during the observation period. μCT analysis revealed that both the extent of bone union and the bone volume were significantly higher in the group with a lower dose of BMP-2 in fibrin matrix than in the groups without BMP-2 treatment. However there was no statistically significant difference between the BMPF and BMPC groups.

Conclusion

We conclude that fibrin matrix is an excellent carrier for BMP-2 and that it provides equivalent results with a sevenfold lower dose of BMP-2 compared with ACS.

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Authors and Affiliations

  1. Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Centre, Austrian Cluster for Tissue Regeneration, Donaueschingenstrasse 13, 1200, Vienna, Austria

    Sebastian Schützenberger, Arthur Schultz, Thomas Hausner, Rudolf Hopf, Gerald Zanoni, Tatjana Morton, Karl Kropik, Martijn van Griensven & Heinz Redl

  2. Lorenz Böhler Trauma Centre, Donaueschingenstrasse 13, 1200, Vienna, Austria

    Arthur Schultz

  3. Department for Trauma Surgery, Paracelsus Private University, Strubergasse 21, 5020, Salzburg, Austria

    Thomas Hausner

Authors
  1. Sebastian Schützenberger
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  2. Arthur Schultz
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  3. Thomas Hausner
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  4. Rudolf Hopf
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Correspondence to Sebastian Schützenberger.

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Schützenberger, S., Schultz, A., Hausner, T. et al. The optimal carrier for BMP-2: a comparison of collagen versus fibrin matrix. Arch Orthop Trauma Surg 132, 1363–1370 (2012). https://doi.org/10.1007/s00402-012-1551-2

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  • DOI: https://doi.org/10.1007/s00402-012-1551-2

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