Fig. 5

Longitudinal (a,b) and shear (c,d) articular displacement at the central aspect of the patella, and interfragmentary rotation around the medio-lateral axis (e,f) in terms of mean value and standard deviation, measured between the corresponding proximal and distal patella fragments after 1000, 2000, 3000, 4000 and 5000 test cycles and featuring simple (a,c,e) and complex (b,d,f) fractures fixed by either anterior variable-angle locked plating (Plate) or TBW.