Use of a 1.5 mm butterfly locking plate for stabilization of atlantoaxial pathology in three toy breed dogs

M. Dickomeit; L. Alves; M. Pekarkova; D. Gorgas; F. Forterre

doi:10.3415/VCOT-10-07-0114

Veterinary and Comparative Orthopaedics and Traumatology, Table of Contents

Vet Comp Orthop Traumatol 2011; 24(03): 246-251
DOI: 10.3415/VCOT-10-07-0114

Case Report

Schattauer GmbH

Use of a 1.5 mm butterfly locking plate for stabilization of atlantoaxial pathology in three toy breed dogs

Authors

M. Dickomeit

¹Small Animal Clinics, Department of Surgery and Orthopedics, University of Bern, Bern, Switzerland
L. Alves

²Small Animal Clinics, Department of Neurology, University of Berne, Switzerland
M. Pekarkova

³Department of Small Animal Clinics, Department of Radiology, University of Berne, Switzerland
D. Gorgas

³Department of Small Animal Clinics, Department of Radiology, University of Berne, Switzerland
F. Forterre

¹Small Animal Clinics, Department of Surgery and Orthopedics, University of Bern, Bern, Switzerland

Abstract

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Summary

The objective of this study was to describe the use of a titanium 1.5 mm locking plate in the stabilization of atlantoaxial pathology in three toy breed dogs. Two dogs with atlantoaxial subluxation and another dog with an axial fracture, confirmed by diagnostic imaging, were stabilized via a ventral approach with a 1.5 mm titanium 5-hole locking butterfly-plate. Surgical reduction and stabilization were assessed by computed tomography and radiography after surgery. Follow-up evaluation for resolution of neurological signs and possible complications was performed in all three dogs. For long-term assessment, a telephone follow-up was performed. A considerable improvement of neurological signs occurred within two to four weeks after surgery. An excellent clinical outcome was identified in all three patients. Adequate stabilization and resolution of neurological signs in all three dogs was achieved. The stabilization of atlantoaxial surgical conditions in toy breeds with the 1.5 mm titanium 5-hole butterfly locking plate appears to be an effective means of surgical treatment.

Keywords

Atlantoaxial - locking plate - toy breed dogs

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References

References
1 Denny HR, Gibbs C, Waterman A. Atlantoaxial subluxation in the dog: a review of thirty cases and an evaluation of treatment by lag screw fixation. J Small Anim Pract 1988; 29: 37-47.
2 McCarthy RJ, Lewis DD, Hosgood G. Atlantoaxial subluxation in dogs. Compend Contin Educ Pract Vet 1995; 17: 215-227.
3 Watson AG, deLahunta A. Atlantoaxial subluxation and absence of transverse ligament of the atlas in a dog. J Am Vet Med Assoc 1989; 195: 235-237.
4 LeCouteur RA, McKeowen D, Johnson J. et al. Stabilization of atlantoaxial subluxation in the dog using the nuchal ligament. J Am Vet Med Assoc 1980; 177: 1011-1017.
5 Beaver DP, Ellison GW, Lewis DD. et al. Risk factors affecting the outcome of surgery for atlantoaxial subluxation in dogs: 46 cases (1978–1998). J Am Vet Med Assoc 2000; 216: 1104-1109.
6 Wheeler SJ. Atlantoaxial subluxation with absence of the dens in a Rottweiler. J Small Anim Pract 1992; 33: 90-93.
7 Thomas WB, Sorjonen DC, Simpson ST. Surgical management of atlantoaxial subluxation in 23 dogs. Vet Surg 1991; 20: 409-412.
8 Ozak A, Besalti O, Pekcan Z. et al. Ventral fixation in atlantoaxial instability with axial fracture in a dog. Vet Comp Orthop Traumatol 2006; 19: 57-599.
9 Stead AC, Anderson AA, Coughlan A. Bone plating to stabilize atlantoaxial subluxation in four dogs. J Small Anim Pract 1993; 34: 462-465.
10 Schulz KS, Waldron DR, Fahie M. Application of ventral pins and polymethylmethacrylate for the management of atlantoaxial instabiity: results in nine dogs. Vet Surg 1997; 26: 317-325.
11 Jeffery ND. Dorsal cross pinning of the atlantoaxial joint: New surgical technique for atlantoaxial subluxation. J Small Anim Pract 1996; 37: 26-29.
12 Kishigami M. Application of an atlantoaxial retractor for atlantoaxial subluxation in the cat and dog. J Am Anim Hosp Assoc 1982; 20: 413-419.
13 Chambers JN, Betts CW, Oliver JE. The use of non-metallic suture material for stabilization of atlantoaxial subluxation. J Am Anim Hosp Assoc 1977; 13: 602-604.
14 Pujol E, Bouvy B, Omana M. et al. Use of the Kishigami Atlantoaxial Tension Band in Eight Toy Breed Dogs with Atlantoaxial Subluxation. Vet Surg 2010; 39: 35-42.
15 Renegar WR, Stoll SG. The use of methylmethacry-late bone cement in the repair of atlantoaxial subluxation stabilization failures – case report and discussion. J Am Anim Hosp Assoc 1979; 15: 313-318.
16 Sorjonen DC, Shires PK. Atlantoaxial instability: a ventral surgical technique for decompression, fixation, and fusion. Vet Surg 1981; 10: 22-29.
17 Shores A, Tepper LC. A modified ventral approach to the atlantoaxial junction in the dog. Vet Surg 2007; 36: 765-770.
18 Sanders SG, Bagley RS, Silver GM. et al. Outcomes and complications associated with ventral screws, pins and polymethylmethacrylate for atlantoaxial instability in 12 dogs. J Am Anim Hosp Assoc 2004; 40: 204-210.
19 Platt SR, Chambers JN, Cross A. A modified ventral fixation for surgical management of atlantoaxial subluxation in 19 dogs. Vet Surg 2004; 33: 349-354.
20 Stone EA, Betts CW, Chambers JN. Cervical fractures in the dog: A literature review and case review. J Am Anim Hosp Assoc 1979; 15: 463-471.
21 Voss K, Keller M, Montavon PM. Internal splinting of dorsal intertarsal and tarsometatarsal instabilities in dogs and cats with the ComPact Uni-Lock 2.0/2.4 System. Vet Comp Orthop Traumatol 2004; 17: 125-230.
22 Trotter E. Cervical spine locking plate fixation for treatment of cervical spondylitic myelopathy in large breed dogs. Vet Surg 2009; 38: 705-718.
23 Bergman RL. Cervical spondylomyelopathy in the dog: A comparison to the disease in humans. Proceedings from the Annual American College of Veterinary Internal Medicine Congress.. 2004. May Berlin; Germany: pg. 17-20.
24 Pitzen T, Barbier D, Titinger F. et al. Screw fixation to the posterior cortical shell does not influence peak torque and pull out in anterior cervical plating. Eur Spine J 2002; 11: 494-499.
25 Smith SA, Lindsey RW, Doherty BJ. et al. An in-vitro biomechanical comparison of the Orosco and AO locking plates for anterior cervical spine fixation. J Spinal Disord 1995; 8: 220-223.
26 Morgan JP, Miyabayashi T, Choy S. Cervical spine motion: radiographic study. Am J Vet Res 1986; 47: 2165-2169.
27 Blass CE, Waldron DR, van Ee TR. Cervical stabilization in three dogs using Steinmann pins and metylmethacrylate. J Am Anim Hosp Assoc 1988; 24: 61-68.