METHOD OF SURGICAL TREATMENT OF VARUS DEVIATION OF THE FIFTH TOE Russian patent published in 2023 - IPC A61B17/56 

FIELD: medicine; surgery; orthopedics.

SUBSTANCE: invention can be used for surgical treatment of varus deviation of the fifth toe. A distal cross cut line is drawn perpendicular to the axis of the distal third of the fifth metatarsal bone, then a proximal cross cut line in the distal third of the fifth metatarsal bone, parallel to the distal cut line, these lines are extended to the lateral surface of the fifth metatarsal bone. On this surface, a point is marked on the line of the distal transverse cut, departing 2 mm from the dorsal surface of the fifth metatarsal bone. The second point is marked in the middle of the line of the proximal cross cut. The marked points are connected with a line to perform a longitudinal osteotomy. The intended osteotomy of the fifth metatarsal bone is performed. After removing the plantar fragment into the wound on the plantar fragment, 3 mm are measured from the extreme lateral point of the line of the transverse distal cut and a perpendicular is drawn to the articular line, extending it to the proximal edge of the plantar fragment. Along the line of this perpendicular in the distal direction, 3 mm from the transverse distal cut are measured and a line to the lateral edge of the fifth metatarsal bone, parallel to the articular line is drawn. The fragment obtained by marking in the distal part of the fifth metatarsal bone is sawn out, forming the first bone protrusion. From the extreme proximal point of the perpendicular in the distal direction, 5 mm are measured and a line parallel to the articular line to the lateral edge of the plantar fragment of the fifth metatarsal bone is drawn. The fragment obtained by marking in the proximal part of the fifth metatarsal bone is sawn out, forming a second bone protrusion. The interlocking of the formed bone protrusions is performed. The second bone protrusion of the plantar fragment is inserted behind the proximal medial protrusion of the dorsal fragment of the fifth metatarsal bone and the formed first bone protrusion is inserted behind the distal medial angle of the dorsal fragment of the fifth metatarsal bone, the fragments are pressed along the axis of the fifth metatarsal bone until they contact and fixed with one cannulated screw in the distal parts of the fifth metatarsal.

EFFECT: method provides increased efficiency of treatment, prevents recurrence of deformity in the postoperative period, provides rigid fixation by performing deformity correction taking into account the size of the fifth metatarsal bone and the medullary canal.

1 cl, 9 dwg, 1 ex