Orthopedic hip replacement is made safer and more effective by enhancing interconnection of hip implant components, such as by improving an interference fit using one or more tapers, threads, and/or cooling of components prior to assembly. For example, a prosthetic femoral neck can include a thread and a Morse taper for lockable attachment to a prosthetic femoral head and/or intramedullary stem. A monoblock head and neck unit is described, having an integrated prosthetic femoral head and prosthetic neck, with structures for engaging the stem.
