In Vivo Evaluation of the Position and Orientation of the Geometric Axis of the Tibiotalar Joint

Figure 2

(a) Top view and (b) front view of the measurement of the parameters of fitting spheres (the radius of the lateral sphere , the radius of the medial sphere , the distance between sphere origins ), (c) fitting spheres and the geometric axes of each talus at all poses, (d) an illustration of the most anterior point at the navicular articular surface and the most posterior point at the posterior process of each talus at all poses.

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