Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1990-03-08
1992-03-03
Isabella, David J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
606 62, 606 63, A61F 228, A61F 504
Patent
active
050928910
ABSTRACT:
A cement plug for sealing the medullary canal of a bone to restrict the flow of cement, debris, etc. beyond a predetermined point in the canal. The cement plug, which is executed in a biocompatible plastic, comprises (1) a tubular body that is a slit axially at three or more locations to define resilient fingers, (2) an obturator plate located at the upper end of the body, (3) a tapered conical plug that can be advanced through the lower end of the body and intot he interior thereof, and (4) a threaded bolt that extends through the tubular body and into the conical plug. Locator holes are formed in the obtrator plate, and sharpe edges, teeth, or locator tab(s) are formed on the outer surface of the conical plug so that said plug does not rotate relative to the tubular body of the plug. An insertion tool, including an inner tube and an outer tube, is engaged within the locator by depending plins. The lower end of the inner tube engages the upper end of the threaded bolt. By rotating a handle so that the tubes move relative to one another, a torquing force is imparted to the head of the bolt. The bolt draws the plug upwardly into the interior of the plug body. Such upward movement of the tapered conical plug forces the resilient fingers outwardly into secure engagement with the wall defining the medullary canal.
Cement, under pressure, is then forced down the medullary canal. The obturator plate, which is situated perpendicular to the body of the plug at the upper end thereof, serves as a barrier to the flow of cement. The obturator plate extends transversely across the medullary canal and may even bow slightly under such pressure; however, the plug will not slip and the cement will now flow, leak or migrate past the plate and adversely impact upon the resilient fingers. The obturator plate may even serve as a secondary gripping member. The plug thus forms a stable platform atop which a prosthesis may be accurately positioned.
REFERENCES:
patent: 3866248 (1975-02-01), Kummer
patent: 3987499 (1976-10-01), Scharbach et al.
patent: 4011602 (1977-03-01), Rybicki et al.
patent: 4245359 (1981-01-01), Stuhmer
patent: 4276659 (1981-07-01), Hardinge
patent: 4293962 (1981-10-01), Fuson
patent: 4302855 (1981-12-01), Swanson
patent: 4337773 (1982-07-01), Raftopoulos et al.
patent: 4344190 (1982-08-01), Lee et al.
patent: 4399814 (1983-08-01), Pratt, Jr. et al.
patent: 4447915 (1984-05-01), Weber
patent: 4488549 (1984-12-01), Lee et al.
patent: 4523587 (1985-06-01), Frey
patent: 4562598 (1986-01-01), Kranz
patent: 4625722 (1986-12-01), Murray
patent: 4627434 (1986-12-01), Murray
patent: 4686973 (1987-08-01), Frisch
"Intramedullary Plugs in Cemented Hip Arthroplasty", Gloria M. Beim, BS, Carlos Lavernia, MD, and F. Richard Convery, MD.
"Ceramics as a New Approach to the Improvement of Artificial Joints"; S. F. Hulbert and J. J. Klawitter.
Kummer Frederick J.
Stuchin Steven A.
Brittingham Debra S.
Isabella David J.
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