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International Orthopaedics

, Volume 39, Issue 5, pp 981–988 | Cite as

Coating with a novel gentamicinpalmitate formulation prevents implant-associated osteomyelitis induced by methicillin-susceptible Staphylococcus aureus in a rat model

  • Christian Fölsch
  • Maike Federmann
  • Klaus D. Kuehn
  • Clemens Kittinger
  • Stefan Kogler
  • Gernot Zarfel
  • Martina Kerwat
  • Steve Braun
  • Susanne Fuchs-Winkelmann
  • Jürgen R. J. Paletta
  • Philip P. RoesslerEmail author
Original Paper

Abstract

Purpose

Implant-associated osteomyelitis still represents a demanding challenge due to unfavourable biological conditions, bacterial properties and incremental resistance to antibiotic treatment. Therefore different bactericide or bacteriostatic implant coatings have been developed recently to control local intramedullary infections. Controlled local release of gentamicin base from a highly lipophilic gentamicin palmitate compound achieves extended intramedullary retention times and thus may improve its bactericide effect.

Methods

Forty male Sprague-Dawley rats were divided into two groups receiving an intramedullary femoral injection of 102 colony-forming units (CFU) of a common methicillin susceptible Staphylococcus aureus strain (MSSA Rosenbach) and either an uncoated femur nail (Group I) or a nail coated with gentamicin palmitate (Group II). Animals were observed for 28 and 42 days. Serum haptoglobin and relative weight gain were assessed as well as rollover cultures of explanted femur nails and histological scores of periprosthetic infection in dissected femurs.

Results

Implants coated with gentamicin palmitate significantly reduced periprosthetic bacterial growth as well as signs of systemic inflammation compared with uncoated implants.

Conclusions

Gentamicin palmitate appears to be a viable coating for the prevention of implant-associated infections. These findings will have to be confirmed in larger animal models as well as in clinical trials.

Keywords

Osteomyelitis Rat model Gentamicin palmitate Coated implants Staphylococcus aureus 

Notes

Acknowledgments

The present study was supported by Synthes GmbH, Umkirch, Germany. The authors thank Mr. Guido Schemken and his staff at the Central Animal Housing Facility in Marburg, as well as Prof. Dr. Markus Schofer and Dr. Stefan Lakemeier for their kind support in performing this study.

Conflict of interest

All authors declare that there is no conflict of interest.

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Copyright information

© SICOT aisbl 2014

Authors and Affiliations

  • Christian Fölsch
    • 1
  • Maike Federmann
    • 1
  • Klaus D. Kuehn
    • 3
  • Clemens Kittinger
    • 4
  • Stefan Kogler
    • 3
  • Gernot Zarfel
    • 4
  • Martina Kerwat
    • 5
  • Steve Braun
    • 6
  • Susanne Fuchs-Winkelmann
    • 1
  • Jürgen R. J. Paletta
    • 1
  • Philip P. Roessler
    • 1
    • 2
    Email author
  1. 1.Department of Orthopaedics and RheumatologyUniversity Hospital MarburgMarburgGermany
  2. 2.Department of Orthopaedics and TraumatologyUniversity Hospital BonnBonnGermany
  3. 3.Department of Orthopaedics and Orthopaedic SurgeryMedical University of GrazGrazAustria
  4. 4.Institute of Hygiene, Microbiology and Environmental MedicineMedical University of GrazGrazAustria
  5. 5.Institute of Medical Microbiology and HygienePhilipps-University MarburgMarburgGermany
  6. 6.Department of Diagnostic and Interventional RadiologyUniversity Hospital MarburgMarburgGermany

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