Figure 4From: Is the use of computer navigation in total knee arthroplasty improving implant positioning and function? A comparative study of 198 knees operated at a Norwegian district hospital 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.Back to article page