Vet Comp Orthop Traumatol 2009; 22(06): 492-497
DOI: 10.3415/VCOT-09-04-0041
Clinical Communication
Schattauer GmbH

Repair of Y-T humeral fractures in the dog using paired ‘String of Pearls’ locking plates

M. G. Ness
1   Croft Veterinary Hospital, Northumberland Business Park West, Cramlington, Northumberland, UK
› Author Affiliations
Further Information

Publication History

Received: 09 April 2009

Accepted: 11 June 2009

Publication Date:
17 December 2017 (online)

Summary

Objectives: To describe a technique for treating Y-T humeral fractures using paired string of pearls (SOP) plates and to review the outcome in 13 cases.

Methods: A series of 13 consecutive Y-T humeral fractures, otherwise known as distal humeral dicondylar fractures, were treated according to a surgical protocol which involved combined medial and lateral surgical approaches, accurate reduction and fixation of the condylar fracture with a single transcondylar lag screw, and then re-alignment and fixation of the diaphyseal fracture using two SOP plates and screws.

Results: Functional outcome was recorded as excellent in 10 dogs, good in two and poor in one. Six of the 13 patients were working dogs and of these, five returned to pre-injury levels of activity, including work. Complications requiring additional surgery were seen in four of the 13 cases, and three of these cases had a sub-optimal functional outcome.

Clinical significance: The results following repair of Y-T fractures using SOP locking plates, placed via combined medial and lateral incisions, compared favourably with those reported for other techniques.

 
  • References

  • 1 Anderson TJ, Carmichael S, Miller A. Intercondylar humeral fractures in the dog: a review of 20 cases. J Small Anim Pract 1990; 31: 437-442.
  • 2 Cockett PA, Clayton-Jones DG. The repair of humeral condylar fractures in the dog: a review of 79 cases. J Small Anim Pract 1985; 26: 493-499.
  • 3 Denny HR. Condylar fractures of the humerus in the dog: a review of 133 cases. J Small Anim Pract 1983; 24: 185-197.
  • 4 Shatzker J.. AO philosophy and principles. Chapter in AO principles of fracture management in the dog and cat.. Ed Johnson AL, Houlton JEF, and Vannini R.. Pub AO Publishing: Switzerland.; 2005: XV-XIX
  • 5 McKee WM, Macias C, Innes JF. Bilateral fixation of Y-T humeral fractures via combined medial and lateral approaches in 29 dogs. J Small Anim Pract 2005; 46: 217-236.
  • 6 Vannini R, Smeak DD, Olmstead ML.. Evaluation of surgical repair of 135 distal humeral fractures in dogs and cats. J Am Anim Hosp Assoc 1998; b 24: 537-545.
  • 7 Turner TM. Fractures of the humerus. Chapter in AO principles of fracture management in the dog and cat.. Ed Johnson AL, Houlton JEF, and Vannini R.. Pub AO Publishing: Switzerland; 2005: 201-215.
  • 8 Piermattei DL. An Atlas of Surgical Approaches to the Bones and Joints of the Dog and Cat. 3rd Edition Pub WB Saunders: Philadelphia; 1993: 133-150.
  • 9 Matteisson DT, Walter M. Surgical management of distal humeral fractures. Comp Cont Ed Pract Vet 1984; 6: 1027
  • 10 Frigg R. Locking compression plate (LCP). An osteosynthesis device based on the dynamic compression plate and the point contact fixator (PC Fix). Injury 2001; 32: 63-66.
  • 11 Schutz M, Sudkemp NP. Revolution in plate osteosynthesis: new internal fixator systems. J Orthop Sci 2003; 8: 252-258.
  • 12 DeTora MD, Kraus KH. Mechanical testing of locking and non-locking 3.5mm bone plates. Vet Comp Orthop Traumatol 2008; 21: 318-322.
  • 13 Hayes WC, Perren SM. Plate-bone friction in the compression fixation of fractures. Clin Orthop Relat Res 1972; 89: 236-240.
  • 14 Ness MG. The effect of bending and twisting on the stiffness and strength of the 3.5 SOP locking plate. Vet Comp Orthop Traumatol 2009; 22: 132-136.
  • 15 Johnson K. Locking plates – The ultimate implant?. Editorial: Vet Comp Orthop Traumatol 2009; 22: 1-2.
  • 16 Ness MG.. Implant failure. Chapter in Manual of Small Animal Fracture Repair and Management.. Pub BSAVA: Gloucester, UK; -1998.
  • 17 Levine DG, Richards DW. Clinical use of the Locking Compression Plate (LCP) in horses: a retrospective study of 31 cases. (2004–2006). Equine Vet J 2007; 39: 401-406.
  • 18 Kraus KH, Ness MG.. SOP-SOP version 1.4 Technical guidelines for the use of the SOP locking plate system, 2008 [document on the Internet]. Orthomed Ltd, Halifax: West Yorkshire, UK.. Available from www.orthomed.co.uk [Cited 2008 March 26] Available from http://www.orthomed.co.uk/downloads/sopsop
  • 19 Charles EA, Ness MG, Yeadon R. Failure mode of transcondylar screws used for treatment of incomplete ossification of the humeral condyle in 5 dogs. Vet Surg 2009; 38: 185-191.
  • 20 Vannini R, Smeak DD, Olmstead ML.. An epidemiological study of 151 distal humeral fractures in dogs and cats. J Am Anim Hosp Assoc 1998; a 24: 355-362.