IMPROVED BONE SCREW FOR THE TREATMENT OF BONE COLLAPSES OR DEFORMATIONS, SUCH AS IN THE CASE OF THE CHARCOT FOOT, AND INSERTION INSTRUMENT OF ANTI-MIGRATION ELEMENTS INTO THE BONE SCREW

摘要

The present invention relates to an improved bone screw (1') for the treatment of bone collapses or deformations, such as in the case of the Charcot foot, comprising a non-threaded intermediate portion (2) spaced between a tip portion (3) and a head portion (4) externally threaded; the bone screw (1') further comprising at least one transverse hole (6) arranged for inserting a corresponding at least one pin (7) to prevent the migration of said bone screw (1) when implanted into the bone. The present invention also relates to an insertion instrument (20) for inserting at least one pin (7) into at least one hole (6) of the bone screw (1').