METHOD FOR CALCULATING CORRECTION IN REARFOOT DEFORMATIONS Russian patent published in 2017 - IPC A61B5/00 A61B5/103 A61B6/00 A61B17/56 

FIELD: medicine.

SUBSTANCE: on the foot X-ray executed in the lateral projection, a point "a" is put corresponding to the posterior edge of the articular surface of the trochlea of talus, and a point "b" corresponding to the anterior edge. A line 1 is drawn through the points "a" and "b" and a point "c" is put on this line anterior to the point "b" at a distance equal to ab×2.6. A line 2 is drawn from point "c" downwards at an angle of 16° to the inteval bc. A distance equal to ab×4.8 is marked on the line 2 from the intersection point of the lines 1 and 2, and a point "d" is put. A line 3 is drawn through the most remote points of the calcaneus crest and a line 4 is drawn from its center, perpendicular to the line 3. The intersection point of the lines 2 and 4 is the vertex of the calcaneus deformation. After the virtual osteotomy is performed, the distal fragment of the calcaneus is moved so that the lines 2 and 4 are coaxial, and the rear boundary of the moved fragment coincides with the "d" point. On the basis of the obtained data, the angle and distance to which the distal fragment of the calcaneus bone must be moved in order to achieve the correct position of the rearfoot are determined.

EFFECT: allows to accurately plan the reconstruction of the rearfoot.

24 dwg, 1 ex