Staged Total Knee Arthroplasty for Windswept Deformity Using Primary Posterior-stabilized Components in a...

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Windswept deformity presents complex challenges in total knee arthroplasty (TKA) due to asymmetric bone loss and soft-tissue imbalance.
• This condition requires careful surgical planning and execution for successful outcomes.

Purpose of the Study:

• To report a case of staged bilateral total knee arthroplasty (TKA) in a patient with windswept deformity.
• To highlight effective management strategies for bone defects and soft-tissue balancing in resource-limited settings.

Main Methods:

• A 70-year-old male with bilateral osteoarthritis and windswept deformity underwent staged TKAs.
• The varus knee was treated with a screw-and-cement technique, and the valgus knee with graded lateral releases, both using primary posterior-stabilized prostheses without stems or augments.

Main Results:

• Both knees achieved a 0°-120° range of motion and significant pain relief at 3 months post-surgery.
• At 3-year follow-up, the patient maintained pain-free status with neutral alignment and stable implants.

Conclusions:

• Successful TKA for windswept deformity is achievable even without advanced constrained implants, emphasizing meticulous surgical decision-making.
• Effective defect management and soft-tissue balancing are crucial for favorable outcomes in complex knee arthroplasty cases.