Modular augments in revision total knee arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Complex primary and revision total knee arthroplasties present challenges in managing bone deficiencies.
• Standard arthroplasty techniques may not adequately address significant bone loss, impacting stability and kinematics.

Purpose of the Study:

• To highlight the benefits of modularity in total knee arthroplasty for complex cases.
• To demonstrate how modular components aid in managing femoral and tibial bone deficiencies.

Main Methods:

• Utilizing modular components for selective augmentation of the distal and posterior femur.
• Employing modular tibial augments to address bone deficits without bone grafting.
• Incorporating modular extended intramedullary stems with options for press-fit or cement fixation.

Main Results:

• Selective femoral augmentation effectively balances soft tissues and enhances joint stability.
• Restoration of joint line and improved patellar and collateral ligament kinematics are achieved.
• Tibial modular augments provide solutions for bone deficiency, avoiding bone graft complications.

Conclusions:

• Modularity in total knee arthroplasty offers significant advantages in managing complex bone deficiencies.
• It enables precise restoration of anatomy and biomechanics, leading to improved functional outcomes.