| 摘要 |
A sealing plug and expander is used in the operation known as total hip replacement wherein the head of the femur bone is removed leaving an opening and replaced with prosthetic components fixed into the bone cavity with penetrating cement. An expansible, elastomeric pressure sealing plug has a generally rectangular portion, a peripheral flange surrounding the rectangular portion at one end, and a central longitudinal hole therethrough which receives a rigid wedge-shaped expander member. The expander has a central inwardly tapered bore which frictionally receives the tubular nozzle of a bone cement cartridge when the nozzle is pressed therein to form a pressure sealing relation therewith. In the relaxed condition, the sealing plug rectangular portion is frictionally received within the femoral canal opening and the flange surrounds the exterior bone surface around the opening of the femoral cavity. The expander member is inserted into the hole in the sealing plug whereby the side walls of the sealing plug are forced radially outward to seal the opening of the femoral cavity. In the expanded condition, the expander and sealing plug provide a pressure seal between the bone cavity opening and the injection gun whereby the penetrating bone cement will be injected into the bone cavity under substantially pressure and will penetrate between the trabeculae of the bone to thereby provide a bone/cement interface to securely hold the prosthetic device in place.
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