Clinical Outcomes Associated with Centerline Canine Cementless Total Hip Arthroplasty in 19 Dogs

Introduction: Total hip arthroplasty (THA) has been used as a treatment for coxofemoral pathology, including coxofemoral osteoarthritis (OA) secondary to canine hip dysplasia (CHD), congenital and traumatic hip luxation, femoral fracture, and proximal femoral tumor excision. The purpose of this study is to evaluate the clinical outcomes associated with the Centerline cementless THA (C-THA) implant in dogs.

Materials and Methods: Nineteen dogs total with 24 hips surgically implanted (22 = hip dysplasia, 1 = chronic right femoral capital physeal fracture, 1 = chronic caudoventral coxofemoral luxation). Dogs with C-THA performed (2010–2019) with follow-up of greater than or equal to 6 months were evaluated. Data included signalment, implants used, complications, management of complications, radiographs, and clinical outcomes. Outcomes were assessed via client, DVM evaluations, and radiographic evidence of bone ingrowth into the implant.

Results: A total of 18 of 24 (75%) cases had a good to excellent outcome. Six cases (25%) had postoperative complications: femoral neck fracture (n = 1; 4.2%), aseptic loosening (2; 8.4%), coxofemoral luxation (1; 4.2%), and infection (2; 8.24%).

Conclusion: C-THA can restore function in dogs affected by disabling disease of the coxofemoral joint. This novel procedure showed outcomes comparable to reports of other THR implants (cemented, cementless, Kyon, and Biomedtrix). C-THA offers a reliable alternative for treating dogs with disabling disease of the hip joints.

Acknowledgment: We would like to thank Biomedtrix for donating implants for 12 cases.