Shape Analysis of the Patellar Bone Surface and Cutting Plane for Knee Replacement Surgery

Figure 6

Angle of lines drawn on sagittal projections: (a) sagittal resection (SR) lines and (b) sagittal anterior surface (SS) lines. Positive angles mean the patella is thicker superiorly. Results are centred around zero, i.e., the average, for each patella. SCP = symmetric contact points, i.e., the calculated plane based on the final selected configuration (Section 3.2), which is symmetric about the patellar centre. S1–S4 = surgeons 1–4.

(a)

(b)