Abstract
Objective The aim of this study was to describe a new surgical method of segmental femoral
ostectomy for the reconstruction of the femoropatellar joint (FPJ) in dogs with medial
patellar luxation (MPL) grade IV.
Study Design The medical records of six dogs that underwent segmental femoral ostectomy to reconstruct
the FPJ for MPL grade IV were retrospectively reviewed. The data included breed, age,
body weight, comorbidities, history of orthopaedic abnormalities, pre- and postoperative
radiographic findings, morphological indicators measured on three-dimensional computed
tomographic multiplanar reconstruction images, surgical methods and postoperative
complications.
Outcomes Eleven hindlimbs with MPL grade IV in six dogs underwent segmental femoral ostectomy
to reconstruct the FPJ with the four basic surgical procedures. Six stifle joints
with femoral varus deformity were treated by closing wedge ostectomy and segmental
ostectomy, while five stifle joints were treated by segmental ostectomy alone. The
mean resected femoral length was 11.7 mm. The mean resected femoral length relative
to the preoperative femoral length was 14.3%. The stability and congruity of the FPJ
was markedly improved, with an increased range of motion in all dogs compared with
their preoperative status.
Conclusion Segmental femoral ostectomy was a useful treatment method for MPL grade IV with shortened
quadriceps muscle length relative to the femoral length. Reconstruction of the FPJ
is important for recovery of limb function.
Keywords
medial patellar luxation - segmental femoral ostectomy - toy-breed dog - patella alta
- femoral varus deformity