Surgical kit for hemiarthroplasty hip replacement

A surgical kit as claimed in claim, wherein the kit comprises multiple spacers and a membrane and the membrane is less rigid than the spacers.

A surgical kit comprising a reamer wherein the reamer is a modular shell reamer for joint refurbishment of a ball and socket anatomical joint such as a hip joint, having a shaft and a substantially part-spherical head separable from the shaft but capable of being securely coupled to the shaft in situ for use, the reamer head having reamer cutting teeth facing not only outwardly toward the socket surface in use but also inwardly toward the ball surface.

A surgical kit for hip replacement comprising:

• a prosthetic femoral head and a reamer,
• said reamer being adapted to ream a socket into an acetabulum until the cancellous bone is exposed,
• the femoral head having a size and shape complementary to the reamer such that the femoral head can be fitted closely and directly into a reamed acetabulum, the size (radius of curvature) of the reamer (ie cutting envelope of the reamer) being at most approximately 5 mm greater than that of the femoral head so that the clearance between the femoral head and acetabulum is 5 mm or less.

A method for hemiarthroplasty of a hip joint comprising providing a prosthetic femoral head and a reamer, and using the reamer to ream a socket into an acetabulum until the cancellous bone is exposed, the femoral head having a size and shape closely complementary to the reamer, and fitting the femoral head directly into the reamed acetabulum, the configuration being such that liquid between the femoral head and the socket will be subjected to a hydrostatic pressure in the range of 0.01-5 MP to stimulate formation of new cartilage between the bone and femoral head.

A minimally-invasive reaming procedure for joint refurbishment of a ball and socket anatomical joint such a hip joint, comprising forming an access tunnel through the ball part of the joint, providing a modular shell reamer having a separable substantially part-spherical head and a shaft, and introducing the shaft of the reamer through the tunnel, introducing the reamer head separately and coupling the inserted end of the reamer shaft to the reamer head in situ, the reamer head, having reamer cutting teeth facing not only outwardly toward the socket surface but also inwardly toward the ball surface, and manipulating the reamer to ream both the socket surface and the ball surface.

A modular shell reamer for joint refurbishment of a ball and socket anatomical joint such as a hip joint, having a shaft and a substantially part-spherical head separable from the shaft but capable of being securely coupled to the shaft in situ for use, the reamer head having reamer cutting teeth facing not only outwardly toward the socket surface in use but also inwardly toward the ball surface.

A surgical kit for hip replacement comprising a reamer, said reamer being adapted to ream a socket into an acetabulum until the cancellous bone is exposed, the size (radius of curvature) of the reamer (ie cutting envelope of the reamer) being at most approximately 5 mm greater than that of a femoral head of a patient on whom the reamer is to be used so that the clearance between the femoral head and acetabulum is 5 mm or less.