Revision for stiffness following TKA: a predictable procedure?

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Reconstructive Surgery

Background:

• Stiffness is a common complication after total knee arthroplasty (TKA).
• Revision TKA is an effective treatment for stiffness, particularly when technical issues like component malposition are present.
• Predictors of success for revision TKA in cases of stiffness are not well-defined.

Purpose of the Study:

• To evaluate the outcomes of revision TKA for stiffness.
• To identify factors that may predict the success of revision TKA for stiffness.

Main Methods:

• A retrospective review of 39 patients who underwent revision TKA for stiffness between 1999 and 2006.
• Average patient age was 60.8 years, average BMI was 30.7, and mean follow-up was 74.4 months.
• Prognostic Level II evidence.

Main Results:

• Revision TKA significantly improved range of motion (ROM) and reduced flexion contracture (p<0.001).
• Knee Society Scores (KSS) improved significantly (p<0.0001), but functional scores did not show significant improvement.
• 25.6% of patients required a second revision; no demographic or operative factors predicted failure.

Conclusions:

• Revision TKA is a viable option for improving ROM in patients with persistent stiffness after primary TKA.
• While revision TKA can improve ROM and potentially pain, it does not consistently restore functional range of motion.
• The outcome of revision TKA for stiffness remains unpredictable, with no clear predictors of failure identified.