Compression hip screw system

Details Compression hip screw system Compression hip screw system

1990-05-21

1991-08-20

DeMille, Danton D.

Surgery

Instruments

Orthopedic instrumentation

606 66, 606 69, A61F 504

Patent

active

050411160

ABSTRACT:
An improved compression hip screw system including a lag screw having a first end with external threads insertable into the proximal end of a femur head and broken fragments thereof and having a second end with an axial bore; a barrel/side plate having a plate-like member attachable at its distal end to a femur and having a barrel at its proximal end for receiving the second end of the lag screw; a compression screw within the barrel and extending into the bore of the lag screw, a supplemental set screw threaded through the barrel/side plate to secure the compression screw in a fixed position with respect to the barrel/side plate; and a coupling device joining the lag screw and compression screw to allow a telescoping motion between the lag screw and the compression screw in the event of axial movement of the broken fragment and lag screw with respect to the proximal end of the femur and the barrel/side plate.

REFERENCES:
patent: 2612159 (1952-09-01), Collison
patent: 2702543 (1955-02-01), Pugh
patent: 2801631 (1957-08-01), Charnley
patent: 3374786 (1968-03-01), Callender
patent: 3996931 (1976-12-01), Callender, Jr.
patent: 4095591 (1978-06-01), Graham, Jr.
patent: 4438762 (1984-03-01), Kyle
patent: 4612920 (1986-09-01), Lower
patent: 4621629 (1986-11-01), Koeneman
patent: 4628923 (1986-12-01), Medoff
patent: 4776329 (1988-10-01), Treharne
patent: 4791918 (1988-12-01), Von Hasselbach

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