| 摘要 |
A bone plug (10) is provided for insertion into the medullary canal of a patient's 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 materia l such as polyethylene, and having sets of distal (24) and proximal fins (26). The distal fins are defined by a spiral thread set at an angle to extend distall y, 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 pas t the bone plug. An insertion tool is disclosed for use in placing the plug during a surgical procedure, such as hip arthroplasty.
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