Understanding the human knee and its relationship to total knee replacement

Area of Science:

• Orthopedic surgery
• Biomechanics
• Biomedical engineering

Background:

• The knee joint, comprising the femur, tibia, and patella, is vital for lower limb movement.
• Normal knee function involves balanced load distribution during static and dynamic activities.
• Understanding knee anatomy and biomechanics is essential for gait analysis, disease diagnosis, and prosthetic implant development.

Purpose of the Study:

• To review the advancements in total knee arthroplasty (TKA) implant designs.
• To highlight the importance of knee physiology and kinematics in prosthetic development.
• To assess the current limitations of TKA in fully restoring natural knee function.

Main Methods:

• Review of current literature on knee biomechanics and TKA.
• Analysis of various TKA implant designs and their indications.
• Evaluation of the kinematic restoration capabilities of existing prosthetics.

Main Results:

• Significant progress has been made in TKA implant design over recent decades.
• A variety of TKA designs exist, providing surgeons with options for diverse patient needs.
• Despite advancements, no current prosthetic design fully replicates the complex kinematics of a healthy knee joint.

Conclusions:

• The development of TKA implants has improved patient outcomes.
• Further research is needed to achieve complete kinematic restoration in prosthetic knee joints.
• Future prosthetic designs should aim to better emulate the intricate movements of the natural knee.