“…They use the mechanical system to simulate the effect of compensation forces necessary for the patient to maintain balance as s/he moves (Adebayo et al, 2011;Arotaritei, Turnea, Filep, Ilea and Rotariu, 2015;Casallas et al, 2011;Chen and Wang, 2015;Wang et al, 2015). The prototype is able to absorb the force generated when the prosthesis comes into contact with a surface, avoiding bounce effects, and it also compensates the angle between the basis of the prosthesis and the coupling axis, thus allowing the user to walk on steep surfaces ( Bravo and Rengifo, 2014; Morgenroth et al, 2011;Yuan et al, 2014;Zheng and Wang, 2016;Zhu, Wang, Li, Sun and She, 2015;Zhu, Wang and Wang, 2014).…”