HARD-TISSUE STEM IMPLANT COMPRISING A BULK STEM IMPLANT, A FACE, PILLARS FOR CONTACTING A CANCELLOUS PORTION OF A HARD TISSUE, AND SLOTS, WHEREIN THE PILLARS ARE PREARRANGED TO MATCH AN UNDERLYING STRUCTURE OF THE CANCELLOUS PORTION

摘要

Hard-tissue stem implants are provided that comprise a bulk stem implant, a face, pillars, and slots. The pillars are for contacting a cancellous portion of a hard tissue, are distributed on the face, across an area of at least 80 mm², and extend distally therefrom. The pillars are prearranged to match an underlying structure of the cancellous portion of the hard tissue. The slots are to be occupied by the cancellous portion of the hard tissue. Methods of making and using hard-tissue stem implants are also provided.