Newton ankle prosthesis

The Newton ankle prosthesis (designed in 1973) was a two-part, nonconstrained prosthesis that had a UHMWPE tibial component with a flat proximal surface and a curved, cylindrical articulating surface [26, 27] (Figure 11.7). It has been described as a multiaxial joint that allows unrestricted motion about any of the three major axes [19]. The talar component comprised CoCr alloy and had a spherical articulating surface with a distal stem that was implanted into the talus. The result was an incongruent articulating surface that allowed dorsiflexion/plantarflexion, as well as slight inversion, eversion, and rotation [26, 27]. 

FIGURE 11.7 Newton ankle prosthesis (from [26], with permission). 

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See also in sourсe #XX -- [ ]

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