Joint perception after hip or knee replacement surgery

Area of Science:

• Orthopedic surgery
• Biomedical engineering
• Rehabilitation medicine

Background:

• Total joint arthroplasty (TJA) procedures, including knee and hip replacements, are effective for improving function.
• However, patients often experience diminished joint sensation post-surgery compared to their native joints.
• Restoring natural joint perception remains a challenge in prosthetic joint outcomes.

Purpose of the Study:

• To compare joint perception and clinical outcomes between various knee and hip arthroplasty procedures.
• To investigate the relationship between patient-reported joint perception and validated clinical scores.
• To evaluate the effectiveness of minimally invasive approaches versus traditional arthroplasty.

Main Methods:

• A cohort of 347 patients undergoing knee or hip arthroplasty were assessed.
• Procedures included unicompartmental knee arthroplasty (UKA), tricompartmental knee arthroplasty (TKA), hip resurfacing (HR), and total hip arthroplasty (THA).
• Patient joint perception, satisfaction, and WOMAC scores were recorded and analyzed.

Main Results:

• Knee arthroplasties (TKA, UKA) resulted in significantly worse joint perception and WOMAC scores compared to hip arthroplasties (THA, HR).
• No significant differences in clinical scores were observed between UKA and TKA, nor between HR and THA.
• Joint perception demonstrated a strong correlation with WOMAC scores across all patient groups (R²=0.951).

Conclusions:

• Minimally invasive procedures (HR, UKA) showed comparable results to traditional arthroplasty (THA, TKA) in terms of joint perception and clinical scores.
• Knee arthroplasty outcomes, particularly joint perception, require further attention and improvement compared to hip arthroplasty.
• Patient-reported joint perception is a valuable clinical tool, correlating highly with validated clinical outcome measures.