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Böttcher, Peter; Zeissler, Markus; Winkels, P.; Ludewig, E.; Maierl, Johann; Grevel, Vera (2007): Mosaikplastik am Ellbogengelenk eines Hundes: Technik des osteochondralen Transfers und Einschätzung der resultierendenGelenkkongruenz mittels Computertomographie und computertomographischer Osteoabsorptiometrie. In: Tierärztliche Praxis / K, Kleintiere, Vol. 35, No. 4: pp. 253-260
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Abstract

Objective: We report on the successful osteochondral transplantation( mosaicplasty) for the treatment of an elbow OCD in a seven-months-old male Golden Retriever. Material and methods: After orthopaedic,radiological, computed tomographic (CT), and arthroscopic diagnostics theOCD lesion was debrided via a medial arthrotomy. Subsequently two transplants 4.5 mm in diameter were harvested on the lateral aspect ofthe femoral trochlea and transferred into the lesion. Three months later clinical and CT examination as well as computed tomographic osteoabsorptiometry (CTOAM) of the transplanted bone plugs were carried out. Results: About 90% of the defect could be filled with hyalinecartilage. However, it was not possible to reconstruct the shape of thejoint surface properly. Three months later follow-up CT imaging revealed stable bone union of both transplants. The intraoperatively observed cartilage surface incongruence was also apparent on three dimensional CT reconstructions of the bony joint surface. In CTOAM low subchondral bone density in the medial aspect of the bone plugs suggestive for reduced load bearing of the transplants was evident. Despite these findings the patient was free of lameness at this time. Conclusion and clinical relevance: Mosaicplasty enables for hyaline resurfacing of OCD lesions in the elbow joint with suboptimal reconstruction of the joint congruency. The distally angled joint surface of the trochlea makes congruent implantation difficult. Whether this technique will result insuperior functional results has to be investigated at long-term. Retrograde transplantation might allow for optimal surface reconstruction in the future.