A Prospective Cohort Study Comparing the Accuracy of Plain Long-leg Radiographs Versus Computerised Tomography-Based Modelling for Calculating Coronal Plane Alignment of the Knee (CPAK) During Robotic Knee Arthroplasty

Description

The presented study by Vishal Rajput focuses on a prospective cohort analysis comparing the accuracy of long legged radiographs with CT scans in planning total knee replacements and robotic partial knee replacements, conducted at University College London Hospitals. The study aims to evaluate the effectiveness of CT scanograms in measuring crucial parameters for knee alignment and assessing discrepancies against traditional radiographic techniques. With a backdrop of existing dissatisfaction among knee replacement patients, the presentation emphasizes anatomical alignment theories and recent classifications that improve preoperative planning. Through a precise gathering of mechanical hip-knee angles, medial proximal tibial angles, and lateral distal femoral angles from both imaging modalities, the findings suggest substantial alignment accuracy using CT technology. The study concludes that CT-based modeling can effectively guide surgical alignment strategies, supporting tailored approaches based on surgeon preferences, thus challenging the necessity of conventional long legged radiographs while still acknowledging their potential value.

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