The upper talocalcanean join
نویسندگان
چکیده
The upper talocalcanean join (articulatio talocruralis)1 is the join of the shin bone (tibia) and the ankle bone (talus). The tibia and the ankle bone are in contact at the facies articularis inferior tibiae2 and the facies articularis superior trochleae tali3. In order to build protheses that simulate the motion of the UTJ we study the geometry of the two surfaces FAIT and FAST, respectively. We are looking for kinematic surfaces that approximate FAIT and FASTT best. For that we use line geometric methods to fit best approximating linear line complexes and compute the axis of the thus determined helical motion. Further we registrate FAIT and FASTT in order to find configurations such that they are in contact. Measuring deviations of the registered surfaces helps to decide if FAIT and FASTT can be in line contact. The detection of possible contact curves will be a topic of future research.
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