Accuracy of Lower Extremity Alignment Correction Using Patient-Specific Cutting Guides and Anatomically Contoured...

Area of Science:

• Orthopedic Surgery
• Biomechanical Engineering
• Medical Imaging

Background:

• Limb malalignment disrupts joint forces, increasing osteoarthritis risk.
• Surgical realignment aims to restore mechanical balance and reduce joint morbidity.
• Accurate alignment is critical and cannot be adjusted post-surgery.

Purpose of the Study:

• To evaluate the benefits of 3D planning and patient-specific guides versus traditional 2D planning for limb alignment correction.
• To compare the accuracy of postoperative alignment using different planning and instrumentation methods.

Main Methods:

• Assessed limb alignment parameters pre- and postoperatively in 51 patients (23 high tibial osteotomies, 28 distal femur osteotomies).
• Compared accuracy between traditional 2D X-ray planning and 3D CT reconstructions with patient-specific guides.
• Measured mechanical axis deviation and tibiofemoral angles.

Main Results:

• 3D planning with patient-specific guides significantly reduced variations in postoperative limb alignment.
• Traditional 2D planning resulted in higher deviations from the intended alignment.
• Patient-specific instrumentation demonstrated superior accuracy in realignment procedures.

Conclusions:

• 3D CT reconstructions and patient-specific guides enhance postoperative limb realignment accuracy.
• Personalized orthopedic surgery approaches improve precision and potentially long-term joint health.
• This method may reduce lower limb malalignment morbidity and delay osteoarthritis onset.