Maximizing flexion after total knee arthroplasty: the need and the pitfalls

Area of Science:

• Orthopedic surgery
• Biomedical engineering
• Rehabilitation medicine

Background:

• Existing knee prostheses typically allow 100-110 degrees of flexion, sufficient for many daily activities.
• Deep knee flexion is essential for specific cultural practices, particularly in Asian countries.
• Limitations in current knee replacement technology impact patients requiring greater range of motion.

Purpose of the Study:

• To investigate the factors influencing postoperative range of motion in knee replacement surgery.
• To highlight the need for improved knee prostheses capable of deeper flexion.
• To address the specific requirements for deep knee flexion in diverse populations.

Main Methods:

• Review of factors affecting range of motion after knee arthroplasty.
• Analysis of current knee prosthesis capabilities and limitations.
• Consideration of surgical techniques and rehabilitation protocols.

Main Results:

• Postoperative range of motion is influenced by preoperative joint mobility, surgical approach, implant design, and physical therapy.
• Standard prostheses may not meet the deep flexion demands of certain activities and cultural practices.
• Optimizing these factors is crucial for enhancing patient outcomes.

Conclusions:

• Achieving adequate deep knee flexion post-surgery requires a multifaceted approach.
• Further advancements in knee prosthesis design are needed to accommodate a wider range of motion.
• Patient-specific needs, including cultural activities, should guide treatment decisions.