Toggle Pin Versus Femoral Head and Neck Ostectomy For Treatment of Hip Luxation in Small Breed Dogs
World Small Animal Veterinary Association World Congress Proceedings, 2009
B.T. Lins1; A.L. Selmi1; S.S. Souza1; P. Custódio2
1Anhembi-Morumbi University, São Paulo, Brazil; 2Universidade Cruzeiro do Sul, São Paulo, Brazil

Traumatic hip luxation is a very common disease in small breed dogs. Traditionally, femoral head and neck ostectomy (FHNO) has been elected as the treatment of choice for this condition. Recently, new options like total hip prosthesis, capsular suture and toggle pin (TP) have been advocated as alternatives to preserve normal joint biomechanics. This study presents a clinical evaluation of TP versus FHNO like surgical treatments for traumatic hip luxation in small breed dogs. Twenty dogs weighting between 3 and 10kg presented with clinical signs of unilateral hip pain and crepitus were radiographically evaluated to determine the direction of luxation and rule out evidences of hip dysplasia. After initial stabilization, dogs were randomly assigned in two surgical groups: TP (10 dogs) and FHNO (10 dogs). Pain (Visual analogue scale), thigh circumference, range of motion, and recurrence of luxation were evaluated at 1, 10, 30, 60 and 180 days post-operative. All patients in both groups were free of pain after the 10th day evaluation. TP group had greater values for thigh circumference at 30, 60 and 180 days post-operative compared with FHNO group. Range of motion was increased in FHNO dogs at days 1 and 10, but diminished at the other moments compared to TP group. One dog in TP group had reluxation within 7 day. Failure of suture material was confirmed at reoperation and a new toggle pin inserted with a heavier monofilament suture. No evidence of osteoarthritis was verified at radiographic evaluation in TP group after any moment. One dog in FHNO group had recurrence of pain at 60days postoperative and had a second surgical procedure performed to remove proliferative bone at the neck region contacting the acetabulum. The Toggle pin hip stabilization can be considered a better alternative for hip luxation in small dogs compared to femoral head and neck excision arthroplasty. Recurrence related to suture failure is a possible complication associated with toggle pin repair.

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B.T. Lins
Anhembi-Morumbi University
São Paulo, Brazil

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