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Biodegradable sleeves for metal implants to prevent implant-associated infection: an experimental in vivo study in sheep


von Plocki, S; Armbruster, D; Klein, K; Kämpf, K; Zlinszky, K; Hilbe, M; Kronen, P W; Gruskin, E; von Rechenberg, B (2012). Biodegradable sleeves for metal implants to prevent implant-associated infection: an experimental in vivo study in sheep. Veterinary Surgery, 41(3):410-421.

Abstract

OBJECTIVE:
To evaluate biocompatibility of biodegradable sleeves containing antimicrobial agents, designed for local drug delivery to prevent implant-related infection.
STUDY DESIGN:
Synthetic polyester sleeves (a copolymer of glycolide, caprolactone, trimethylene carbonate, lactide) were cast as thin films. The antimicrobial agents incorporated in the sleeves included gentamicin sulfate, triclosan, or a combination of these drugs.
ANIMALS:
Adult sheep (n = 15).
METHODS:
Two limited contact dynamic compression plates (LC-DCP) with or without sleeves were implanted on tibiae (bilateral) of 15 sheep. Sleeves were placed over the plates before implantation. Beneath half of the plates, 5-mm drill hole defects were made in the near cortex. Samples were harvested 4 weeks later for histology and microradiography.
RESULTS:
Macroscopically, no irritation of bone or adjacent tissue was seen. Small remnants of sleeves were visible on histology, and positively correlated with the presence of macrophages and foreign body cells. Thick sections showed no difference between the test samples and controls in terms of fibrous capsule formation, periosteal remodeling, and defect remodeling. Inflammatory cells, macrophages, and foreign body cells were more prominent in sections with sleeves, but were not statistically significantly different from controls. Cell numbers were within normal physiologic limits normally seen as cellular response to foreign bodies consisting of polymers.
CONCLUSION:
The normal healing response indicated that the biodegradable sleeves demonstrate tissue biocompatibility.

OBJECTIVE:
To evaluate biocompatibility of biodegradable sleeves containing antimicrobial agents, designed for local drug delivery to prevent implant-related infection.
STUDY DESIGN:
Synthetic polyester sleeves (a copolymer of glycolide, caprolactone, trimethylene carbonate, lactide) were cast as thin films. The antimicrobial agents incorporated in the sleeves included gentamicin sulfate, triclosan, or a combination of these drugs.
ANIMALS:
Adult sheep (n = 15).
METHODS:
Two limited contact dynamic compression plates (LC-DCP) with or without sleeves were implanted on tibiae (bilateral) of 15 sheep. Sleeves were placed over the plates before implantation. Beneath half of the plates, 5-mm drill hole defects were made in the near cortex. Samples were harvested 4 weeks later for histology and microradiography.
RESULTS:
Macroscopically, no irritation of bone or adjacent tissue was seen. Small remnants of sleeves were visible on histology, and positively correlated with the presence of macrophages and foreign body cells. Thick sections showed no difference between the test samples and controls in terms of fibrous capsule formation, periosteal remodeling, and defect remodeling. Inflammatory cells, macrophages, and foreign body cells were more prominent in sections with sleeves, but were not statistically significantly different from controls. Cell numbers were within normal physiologic limits normally seen as cellular response to foreign bodies consisting of polymers.
CONCLUSION:
The normal healing response indicated that the biodegradable sleeves demonstrate tissue biocompatibility.

Citations

4 citations in Web of Science®
7 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Institute of Veterinary Pathology
05 Vetsuisse Faculty > Veterinary Clinic > Equine Department
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Date:2012
Deposited On:01 Mar 2012 11:11
Last Modified:05 Apr 2016 15:44
Publisher:Wiley-Blackwell
ISSN:0161-3499
Publisher DOI:https://doi.org/10.1111/j.1532-950X.2011.00943.x
PubMed ID:22239648
Permanent URL: https://doi.org/10.5167/uzh-60979

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