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Sagittal plane alignment. In the CON group, ideal angles are 0-10° for gamma and 86° for sigma. In the CAOS group, the surgeon has adjusted the alignment to the patient’s anatomy. Thus, the angles had a wider range compared to the conventional group. 4a: Gamma (femoral component flexion). Large angles indicate high degree of femoral component flexion. 4b: Sigma (slope of tibial component). Angles less than 90 indicate posterior slope.
