Avaliação radiográfica e tomográfica de cães submetidos à artroplastia coxofemoral total híbrida

Abstract

The total hip arthroplasty is the most effective surgical technique for the treatment of severe canine hip dysplasia. Currently, the radiographic examination is the most common method used to assess this procedure in dogs, but has some limitations. CT scan by computed tomography instead enables the acquisition of images without overlap, thereby determining the positioning of prosthetic components with greater accuracy. This research aimed to evaluate by radiography and CT scan examinations the use of a hybrid modular total hip prosthesis developed and made in Brazil, applied experimentally in healthy dogs. Six skeletally mature dogs, which previously underwent surgery on the left hip joint were used. The dogs underwent CT scan at 360 days and three years after surgery. All animals showed good positioning of prosthetic components, and proper joint reduction. In the CT scan, however, it was possible to detect irregular fill areas in some animals. In addition, CT scan allowed the detection and monitoring of areas of bone resorption around the acetabular component. Therefore, the CT scan was useful in the evaluation of prosthetic joints, with the advantage of optimum sharpness of the images and allowing for the possibility of quantifying peri-prosthetic changes and measure joint, fundamental relations for late postoperative follow-up.