Locked intramedullary nail, suitable in particular for fractures

Details Locked intramedullary nail, suitable in particular for fractures Locked intramedullary nail, suitable in particular for fractures

1996-06-03

1997-08-19

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

606 64, A61B 1772

Patent

active

056582870

ABSTRACT:
A locked intramedullary nail suitable for treating fractures of the femur, including a pin provided with proximal and distal holes for the passage of locking screws, and further including coaxial tubular elements of greater diameter than the pin, the first of which is mounted from the proximal end on the pin and is provided with restraining means which prevent its rotation about the pin but which enable it to translate along its axis as far as a stop, the first element comprising an upper thread and holes for the passage of the proximal locking screws, between the thread and said holes it being to a certain extent elastically yieldable in the manner of a spring by the effect of spiral slits provided through its lateral surface, the second of the coaxial tubular elements being mounted on said first element and engaging it via a thread of opposite hand to that of the first element, while at the same time engaging the proximal end of the pin by screwing, so that while said second element screws onto the pin it unscrews at the same time from the first element, which hence translates along the pin to withdraw from its proximal end.

REFERENCES:
patent: 5112333 (1992-05-01), Fixel
patent: 5263955 (1993-11-01), Baumgart et al.
patent: 5505734 (1996-04-01), Caniggia et al.

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