A Retrospective Analysis of Lower Limb Deformity Correction using Three-dimensional Computed Tomography Scan.

Area of Science:

• Orthopedic Surgery
• Medical Imaging
• Biomechanical Engineering

Background:

• Traditional lower limb deformity correction relies on standard anteroposterior (AP) and lateral radiographs.
• Three-dimensional computed tomography (3D-CT) scans provide a more detailed understanding of complex deformities.
• 3D-CT enables intricate planning for accurate deformity correction in lower limbs.

Purpose of the Study:

• To evaluate the application of 3D-CT scans in planning lower limb deformity correction.
• To assess the accuracy of 3D-CT in understanding deformities in three-dimensional projection.
• To demonstrate the utility of 3D-CT for precise malalignment correction.

Main Methods:

• Retrospective analysis of 107 lower limb deformity cases planned using 3D-CT scans from September 2017.
• Measurements of angles and lines from AP and lateral 3D-CT image sections, replacing standing orthoscanograms.
• Osteotomies stabilized with Ilizarov fixation and corrected using the Hexapod system.

Main Results:

• 3D-CT scan AP and lateral images facilitated accurate planning for deformity correction.
• The technique allowed for comprehensive understanding of deformities across all three planes, including rotational malalignment.
• A single 3D-CT scan provided complete visualization of complex lower limb deformities.

Conclusions:

• 3D-CT scans yield precise information regarding deformities in sagittal, frontal, and rotational planes.
• This precise information enables enhanced planning and execution of lower limb deformity corrections.
• 3D-CT scanning is a valuable tool for achieving accurate correction of lower limb malalignments.