Ciência Rural (Jun 1998)
Artrodese do joelho em cães pela fixação externa Arthrodesis of the stifle in dogs by external fixation
Abstract
Sete cães clinicamente sadios sofreram artrodese do joelho direito ou esquerdo. A imobilização foi realizada por meio de fixador externo com pinos de Steinmann e barras de acrílico autopolimerizável. Foram removidas todas as estruturas intra-articulares e seccionadas as superfícies articulares do fémur e da tíbia. Foi realizada enxertia com osso esponjoso autógeno entre os ossos e aplicada a imobilização mantendo o ângulo articular estabelecido no pré-operatório. Foi observado o retorno ao uso funcional do membro e foram feitos controles radiográficos no pós-operatório imediato, 30, 60 e 90 dias de evolução. Os aspectos da fusão articular foram avaliados macro e microscopicamente. Constatou-se que esse tipo de fixação promove retorno precoce ao uso do membro com desempenho funcional satisfatório, sendo eficiente para promover a artrodese da soldra.Arthrodesis of the stifle joint was performed on seven healthy dogs. The fusion of right or left femorotibial joint was made using external skeletal fixation by placing a transfixation of Steinmann pins that were connected with autopolimerized acrylic bars. Intra-articular structures were removed and ostectomy of articular sur faces of distal fémur and proximal tíbia were made. After autogenous cancellous bone graft was inserted, immobilization was placed to maintain the selected joint angle measured in the preoperative period. The functional performance was observed and radiographic evaluation was done immediately after surgery, and at 30, 60 and 90 postoperative days. Fusion of the joint was judged by microscopic and macroscopic observations. The external skeletal fixation provided early return to weight-bearing function with satisfactory functional degree. Results of this study indicated that this type of immobilization is entirely satisfactory to produce arthrodesis of the stifle joint.
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