![]() All these methods have proven to improve surgical alignment accuracy and final patient outcomes. These methods include pre-operative 3D surgery planning, design of 3D printable patient-specific instrumentation (PSI), computer navigation and robotic techniques. To improve the outcomes of a total knee arthroplasty (TKA), newer modalities for pre-operative and intra-operative planning have been developed over the recent years. Point-to-surface (P2S) error, in the distal femur and proximal tibia regions of the models reconstructed using XrayTo3D ®, were also measured. The interobserver reproducibility within each group was measured by the intraclass correlation coefficient (ICC). Two-sided t tests of the mean values were calculated to compare the two measurement methods. ![]() Statistical association between both the groups was measured by Pearson's correlation coefficient. Mean and standard-deviation values were measured for all the parameters in both the groups. In an analysis of 45 lower limbs, 11 anatomical parameters were measured [Medial Proximal Tibial Angle-MPTA, Tibial(T)-torsion, T-slope, T-length, Mechanical Lateral Distal Femoral Angle (mLDFA), F-version, F-length, Distal femoral Medio lateral width (F-ML), Distal Femoral Antero Posterior (F-AP), Proximal Tibia Antero Posterior (T-AP), Proximal Tibia Medio Lateral (T-ML) based on landmarks selected by three orthopaedic surgeons(numbers of the authors superscript), on two groups of 3D models, one reconstructed using XrayTo3D ® and the other using CT.
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