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Archive (2005–2015)

Modification of the cranial closing wedge ostectomy technique for the treatment of canine cruciate disease

Journal: Veterinary and Comparative Orthopaedics and Traumatology (VCOT)
ISSN: 0932-0814
DOI: https://doi.org/10.3415/VCOT-10-11-0159
Issue: 2011: Issue 6 2011
Pages: 457-462

Modification of the cranial closing wedge ostectomy technique for the treatment of canine cruciate disease

Description and comparison with standard technique

A. M. Wallace (1), E. S. Addison (2), B. A. Smith (3), H. Radke (4), S. J. Hobbs (4)

(1) Langford Veterinary Services, School of Clinical Veterinary Science, University of Bristol, Langford House, Langford, North Somerset, United Kingdom; (2) Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, United Kingdom; (3) Brisbane Veterinary Specialist Centre, Albany Creek, QLD, Australia; (4) Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom

Keywords

ostectomy, Modified, cranial closing wedge, excessive tibial plateau angle, Terrier breed dogs

Summary

Objective: To describe a modification of the cranial closing wedge ostectomy (CCWO) technique and to compare its efficacy to the standard technique on cadaveric specimens. Methods: The standard and modified CCWO technique were applied to eight pairs of cadaveric tibiae. The following parameters were compared following the ostectomy: degrees of plateau levelling achieved (degrees), tibial long axis shift (degrees), reduction in tibial length (mm), area of bone wedge removed (cm²), and the area of proximal fragment (cm²). Results: The size of the removed wedge of bone and the reduction in tibial length were significantly less with the modified CCWO technique. Clinical significance: The modified CCWO has two main advantages. Firstly a smaller wedge is removed, allowing a greater preservation of bone stock in the proximal tibia, which is advantageous for implant placement. Secondly, the tibia is shortened to a lesser degree, which might reduce the risk of recurvatum, fibular fracture and patella desmitis. These factors are particularly propitious for the application of this technique to Terrier breeds with excessive tibial plateau angle, where large angular corrections are required. The modified CCWO is equally effective for plateau levelling and results in an equivalent tibial long-axis shift. A disadvantage with the modified technique is that not all of the cross sectional area of the distal fragment contributes to load sharing at the osteotomy.

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