Modular lag screw

摘要

An elongated modular implant is provided which has a distal part and a proximal part both having a leading end and a trailing end, respectively. The trailing end of the distal part includes a tool engagement portion and the leading end of the proximal part includes a distal part engagement portion for an engagement with the tool engagement portion of the distal part. The implant further includes an assembly element for firmly coupling the distal part and the proximal part when the first tool engagement portion of the distal part engages the distal part engagement portion of the proximal part. The proximal part trailing end may also have a tool engagement portion identical to the trailing end of the distal part.

主权项

1. A bone screw comprising:
a distal part comprising a first leading end and a first trailing end, wherein the first trailing end includes a first tool engagement portion having at least one slot, and a proximal part comprising a second leading end and a second trailing end, wherein the second leading end includes a distal part engagement portion having at least one protrusion for an engagement with the at least one slot of the first tool engagement portion of the first trailing end of the distal part, and wherein the second trailing end includes a second tool engagement portion having a plurality of slots forming the second tool engagement portion, wherein the second tool engagement portion corresponds to the first tool engagement portion of the distal part, and an assembly element for firmly coupling the distal part and the proximal part when the first tool engagement portion of the distal part engages the distal part engagement portion of the proximal part.