Abstract: A bedding apparatus includes a top cover for a mattress that is removably securable to a mattress band. The mattress band is, in turn, removably securable to the mattress without physical connection. The connections between the top cover and the mattress band may be zippers that allow them to be connected along three sides. The zipper portions on the mattress band and the top cover are complementary, allowing the two components to be zipped together. The two zipper portions on the top cover are also complementary with each other, allowing the top cover to be zipped together into a self-contained sleeping enclosure. The mattress band may encircle the mattress, and can be mounted over an underlying mattress covering, such as a sheet. When the top cover is secured to the mattress band, and there is no person located between the top cover and the mattress, the top cover drapes over the sides of the mattress to a vertical position lower than that of the securing connections between the top cover and the mattress.

Abstract: An acetabular cup includes a plurality of bone receiving depressions on its convex exterior surface. Bone, obtained from the femoral head of the hip to be replaced, is morselized and then compressed in the bone receiving depressions. The dense bone on the exterior surface of the acetabular cup serves as a graft and acts as a new subchondral bone. The bony fixation technique may be used on other prosthesis (e.g., shoulders, and the like). Variations in size, shape, depth and distribution of the recesses can be modified to make this form of fixation applicable to all forms of bone/prosthesis fixation.

Abstract: An implant for a hip or other joint is provided. Briefly stated, a intramedullary stem is provided having flexibility which is comparable to that of the surrounding bone. A bore is disposed in the stem portion with the stem wall thickness uniform or varying from the proximal end to the distal end, depending upon the amount of flexibility desired. This flexibility therefore distributes the loading forces from the joint more uniformly over the supporting cortical bone with the result that bone degeneration from stress shielding is minimized or eliminated.

Abstract: An implant for a hip or other joint is provided. Briefly stated, an intramedullary stem is provided having flexibility which is comparable to that of the surrounding bone. A bore is disposed in the stem portion with the stem wall thickness uniform or varying from the proximal end to the distal end, depending upon the amount of flexibility desired. This flexibility therefore distributes the loading forces from the joint more uniformly over the supporting cortical bone with the result that bone degeneration from stress shielding is minimized or eliminated.