Surgery – Instruments – Orthopedic instrumentation
Patent
1988-10-17
1990-10-09
Hafer, Robert A.
Surgery
Instruments
Orthopedic instrumentation
606 86, 623 16, A61F 504, A61F 228
Patent
active
049617400
ABSTRACT:
A fusion cage 10 includes a cage body defining an internal cavity with an inner surface and an outer surface. The outer surface defines a helical thread 12 comprised of a plurality of turns which define valleys 14 therebetween. Located in the valleys 14 are perforations 13 which provide communication between the outer surface and the interior cavity. Thus, when the fusion cage 10 is mated to a bone structure and the internnal cavity is packed with bone chips or other bone-growth-inducing substances, there is immediate contact between the bone structure and the bone chips through the perforations 13.
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Dickhudt Eugene A.
Ray Charles D.
Hafer Robert A.
Owens Kerry
Surgical Dynamics Inc.
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