A sequential three-step lateral release for correcting fixed valgus knee deformities during total knee arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomechanical Engineering

Background:

• Fixed valgus deformity of the knee presents a significant surgical challenge.
• Accurate correction is crucial for restoring knee function and stability.

Purpose of the Study:

• To describe a sequential soft-tissue release approach for correcting fixed valgus knee deformities.
• To evaluate the technique's efficacy in achieving neutral alignment and correcting tibial rotation.
• To assess the suitability of the approach for unconstrained knee arthroplasty.

Main Methods:

• A sequential release of soft tissues around the knee joint was performed.
• The approach was designed to address deformities up to 90 degrees of valgus.
• Surgical outcomes were assessed for alignment correction and rotational stability.

Main Results:

• The sequential release technique successfully corrected fixed valgus deformities up to 90 degrees.
• Spontaneous correction of fixed external tibial rotation deformities was observed.
• The approach provided early and late stability, facilitating the use of unconstrained implants.

Conclusions:

• This sequential soft-tissue release method offers an effective solution for severe fixed valgus knee deformities.
• The technique allows for simultaneous correction of tibial rotation.
• It enables the use of modern unconstrained knee arthroplasty components, including mobile-bearing designs.