Finite element analysis in the optimization of posterior-stabilized total knee arthroplasty

Area of Science:

• Orthopedic biomechanics
• Computational engineering
• Medical device design

Background:

• Posterior-stabilized total knee arthroplasty (PS-TKA) demonstrates high patient satisfaction and functional recovery.
• Implant optimization in design, materials, and biomechanics underpins PS-TKA success.
• Finite element analysis (FEA) is a numerical simulation technique crucial for mechanical assessment and optimization.

Purpose of the Study:

• To review the principles and applications of FEA in posterior-stabilized (PS) design for total knee arthroplasty (TKA).
• To elucidate the role of FEA in understanding tibiofemoral and patellofemoral biomechanics within PS-TKA.
• To discuss the limitations and future perspectives of FEA and digital simulation, including the digital twin concept, in clinical practice.

Main Methods:

• Comprehensive literature review focusing on FEA applications in PS-TKA.
• Analysis of studies examining implant design, biomechanical behavior, and clinical outcomes.
• Exploration of methodological variations and interpretation challenges in FEA results.

Main Results:

• FEA has been instrumental in optimizing PS-TKA implant design and understanding biomechanics.
• Significant variations exist in FEA methodologies, necessitating expertise in numerical and biomechanical fields.
• FEA provides insights into tibiofemoral and patellofemoral joint behavior, aiding clinical understanding.

Conclusions:

• FEA is a valuable tool for advancing PS-TKA technology and patient outcomes.
• Standardization of FEA methods and improved accessibility are needed for wider clinical adoption.
• Digital simulation, particularly the 'digital twin' concept, holds promise for personalized orthopedic surgery.