Abstract
Objective The aim of this study was to determine the effect of double pelvic osteotomy (DPO)
on dorsolateral subluxation (DLS) of the femoral head in a weight-bearing position.
Study Design Retrospective observational study with treatment effect analysis. Twenty-four client-owned
dogs that underwent DPO due to hip dysplasia.
Methods Computed tomography (CT) studies were performed on 24 dogs that underwent a DPO between
2015 and 2021. The patients were positioned with the femora in a weight-bearing position.
The DLS score was measured pre-DPO, immediately post-DPO, and at follow-up to determine
if DPO resulted in an increase in the DLS score.
Results A total of 21 dogs underwent single-stage bilateral DPO and 3 dogs underwent unilateral
DPO resulting in 45 hip joints available for analysis. Follow-up CT was available
for 29 of these at a median of 51 days (range: 35–482 days). The mean DLS score was
36.1% ± 14.6 preoperatively, 71.4% ± 12.5 post-DPO, and 70.0% ± 15.3 at follow-up.
The increase between the pre- and postoperative measurement was significant (p < 0.001).
Conclusion DPO results in reduced subluxation of the femoral head in a weight-bearing position.
Clinical Significance The in vivo results suggest that DPO will result in reduced femoral subluxation during
weight-bearing.
Keywords
osteotomy - joint - pelvic osteotomy - hip dysplasia - dorsolateral subluxation
