Summary
Objectives: To report the clinical and radiographic outcome of a canine total hip prosthesis
with a dual mobility acetabular component, with a minimum of six months follow-up.
Methods: The outcome of dogs that underwent primary cemented unilateral dual mobility hip
prosthesis surgery by one of the authors for hip dysplasia or trauma, and which had
a minimum of six months clinical and radiologic follow-up, was evaluated.
Results: Fifty dogs were included in the study. Follow-up ranged from six to 38 months (mean
14.4 months). Perioperative complications were acetabular collapse (n = 1) and greater
trochanter fracture (n = 1), both of which were successfully managed perioperatively.
Postoperative complications were aseptic loosening of the acetabular component (n
= 2; both surgically revised), implant sepsis (n = 3; all explanted), acetabular fracture
(n = 1; conservatively managed), greater trochanter fracture (n = 1; conservatively
managed) and sciatic neurapraxia (n = 1). No cases of postoperative luxation or femoral
implant aseptic loosening were encountered. Outcome was poor for three cases (3 implant
sepsis), fair for three cases (including 1 acetabular component loosening and 1 acetabular
fracture), and good or excellent for 44 cases (88%).
Clinical significance: There were not any cases of postoperative coxofemoral luxation observed in this series
of 50 dogs with dual mobility hip prosthesis. Studies with more patients and longer
follow-up are needed to confirm the satisfactory results observed to date with this
implant.
Keywords
Hip - prosthesis - replacement - arthroplasty - dual mobility