Prosthesis inserter
AssigneeBenoist Girard SAS
InventorsGunnar Tore Flivik, Krister Wulff, John Andrew Storer
Life of this patent
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Abstract
A prosthetic hip inserter is designed for use when implanting a hip stem with bone cement. The inserter includes an attachment device for securing and holding the hip implant prior to and during insertion into the medullary canal of the femur. The inserter includes a pressurizer carried on the end of the inserter which carries the attachment device. The pressurizer includes a seal which surrounds at least part of the outer circumference of the prosthesis to be implanted. This both prevents the escape of and application of pressure to the bone cement prior to its curing. The thickness of the seal can be used to adjust the depth of insertion of the hip implant stem.
Claims47
A prosthesis inserter for inserting a prosthesis having a portion extending beyond the surface of a mouth of a resected opening in a bone the prosthesis to be held in place with cement in the bone the inserter comprising:
- a handle having an attachment device mounted thereon for securing and holding the portion of the prosthesis to be implanted extending beyond the surface of the mouth of the opening in the bone and a pressurizer mounted thereon to bear against a seal which is adapted to surround at least part of an outer circumference of said portion of the prosthesis to be implanted at the surface of the mouth of the opening in the bone to prevent escape of and to maintain pressure on the cement surrounding the prosthesis at the mouth of the opening in the bone when said prosthesis has been placed in position with respect to the resected bone.
The prosthesis inserter as claimed in claim 19 in which said attachment device includes a resilient adaptor shaped to surround the trunion of the prosthesis to be implanted and an engagement element which grasps said resilient adaptor.
A prosthesis inserter as claimed in 2 which includes a pressure means to bear against a sealing means which are adapted to surround at least part of the outer circumference of the prosthesis to be implanted to prevent escape of and to maintain pressure on the cement surrounding the prosthesis at the mouth of the opening in the bone when said prosthesis has been placed in position with respect to the cut bone.
A prosthetic femoral implant inserter for inserting a prosthesis having a portion extending beyond the surface of a mouth of a resected opening in the femur along an insertion axis, said implant having a trunion formed at its proximal end, said inserter comprising:
- a handle having a body;
- a generally circular clamp coupled to a leading end of the handle body with a bore adapted to receive and engage the trunion of said prosthesis;
- a pressurizer plate coupled to said leading end of the inserter and spaced laterally from said clamp;
- and
- a seal coupled to said pressurizer plate, said seal surrounding the proximal end of the prosthesis adjacent the resection plane of the femur and sized to form a seal around the surface of the mouth of the resected bone of the proximal femur.
Dependencies are inferred from the claim text.