Intramedullary bone plug

Details Intramedullary bone plug Intramedullary bone plug

1996-12-02

1998-07-21

Clarke, Robert A.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

606 62, 606 95, A61F 228

Patent

active

057829179

ABSTRACT:
A bone plug is provided for insertion into the medullary canal of a patient bone during orthopedic surgery, wherein the bone plug restricts or prevents passage of bone cement introduced under pressure into the medullary canal. The bone plug comprises a generally cylindrical member formed from a biocompatible material such as polyethylene and having sets of distal and proximal fins. The distal fins are defined by a spiral thread set at an angle to extend distally, to bend to accommodate the shape of the medullary canal and thereby anchor the bone plug by biting into patient bone, whereas the proximal fins flex during plug insertion to extend proximally and thereby seal against bypass flow of bone cement past the bone plug. An insertion tool is also disclosed, for use in placing the bone plug during a surgical procedure, such as hip arthroplasty.

REFERENCES:
patent: 4245359 (1981-01-01), Stuhmer
patent: 4293962 (1981-10-01), Fuson
patent: 4302855 (1981-12-01), Swanson
patent: 4447915 (1984-05-01), Weber
patent: 4697584 (1987-10-01), Haynes
patent: 5078746 (1992-01-01), Garner
patent: 5100405 (1992-03-01), McLaren

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