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Trochlear Ridge Prosthetic Replacement Surgery in 20 Dogs with Medial Patellar Luxation: Clinical and Radiographic
Isobel Rose MacEwan1, Elyshia Jay Hankin2, Laura Anne Barbur3
1Veterinary Specialists Aotearoa Limited, Department of Diagnostic Imaging, Auckland, New Zealand, Auckland.
Summary
The RidgeStop implant effectively corrected medial patellar luxation (MPL) in most dogs, showing a low complication rate. Some dogs experienced recurrent luxation, possibly linked to higher preoperative grades.
Area of Science:
- Veterinary Surgery
- Orthopedics
- Canine Health
Background:
- Medial patellar luxation (MPL) is a common orthopedic condition in dogs.
- Surgical correction aims to restore normal stifle function and alleviate pain.
Purpose of the Study:
- To evaluate the efficacy of the RidgeStop prosthetic implant for treating canine MPL.
- To assess clinical outcomes, owner satisfaction, and radiographic changes post-surgery.
Main Methods:
- Retrospective review of 20 client-owned dogs undergoing RidgeStop surgery for MPL.
- Data collection included lameness grades, complications, and concurrent procedures.
- Radiographic analysis and client surveys were utilized to gather outcome data.
Main Results:
- Successful clinical and radiographic correction of MPL in 24/25 limbs.
- No intraoperative complications, implant failures, or infections were reported.
- Postoperative improvement was perceived by most owners, though some experienced worsening or no change.
Conclusions:
- The RidgeStop implant is effective in preventing MPL with a low complication rate.
- Recurrent luxation is an uncommon complication, potentially related to preoperative severity.
- Proximal patellar ligament thickening and stifle effusion are frequent short-to-medium term radiographic findings.