Expansion locking vertebral body screw, staple, and rod assembly

Details Expansion locking vertebral body screw, staple, and rod assembly Expansion locking vertebral body screw, staple, and rod assembly

1998-10-19

1999-05-04

Buiz, Michael

Surgery

Instruments

Orthopedic instrumentation

606 73, 606 75, 606 69, A61B 1770

Patent

active

058999051

ABSTRACT:
A rod, screw, rod receiving member, and staple assembly for use in conjunction with anterior or lateral spinal rod implant apparatus includes a vertebral body screw, staple, and rod receiving member which are initially loosely coupled together such that they may each rotate about a common axis. They are held together by virtue of the head of the screw being held within a tapered axial bore of the rod receiving member and the staple being loosely mounted around the rod receiving member. The lower portion of the rod coupling member is expandable by virtue of a series of slots formed in its lower portion. The screw seats within the axial bore of the rod receiving member such that a rod inserted in the channel of the member seats on the head of the screw. With the rod coupling element and staple combination mounted to the screw, it is driven into the vertebral bone. The member is then rotated into position to receive the rod, which seats on the head of the screw. The application of a top locking nut causes the rod to compress against the head of the screw which translates downwardly in the bore, thus expanding the lower portion of the member, and locking the staple and the screw to the member.

REFERENCES:
patent: 5415659 (1995-05-01), Lee et al.
patent: 5620443 (1997-04-01), Gertzbein et al.
patent: 5662652 (1997-09-01), Schafer et al.
patent: 5690629 (1997-11-01), Asher et al.
patent: 5713898 (1998-02-01), Stucker et al.
patent: 5810816 (1998-09-01), Roussouly et al.

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