Abstract: An intramedullary stem prosthesis includes a trunnion tapered in a first direction toward a proximal end of the intramedullary stem, and a conical shaft interfacing with the trunnion at a modular taper junction. The conical shaft is tapered in a second direction toward a distal end of the second component and has a proximal portion, a distal portion, and flutes positioned about a longitudinal axis of the conical shaft and extending along an entire length of the conical shaft and terminating at the modular taper junction such that the flutes intersect the modular taper junction. The proximal portion defines a first taper angle, the distal portion defines a second taper angle greater than the first taper angle, and the flutes define a major diameter of the conical shaft. The major diameter tapers at a major diameter taper angle that is constant along the entire length of the conical shaft.

Abstract: An intramedullary stem prosthesis includes a trunnion tapered in a first direction toward a proximal end of the intramedullary stem, and a conical shaft interfacing with the trunnion at a modular taper junction. The conical shaft is tapered in a second direction toward a distal end of the second component and has a proximal portion, a distal portion, and flutes positioned about a longitudinal axis of the conical shaft and extending along an entire length of the conical shaft and terminating at the modular taper junction such that the flutes intersect the modular taper junction. The proximal portion defines a first taper angle, the distal portion defines a second taper angle greater than the first taper angle, and the flutes define a major diameter of the conical shaft. The major diameter tapers at a major diameter taper angle that is constant along the entire length of the conical shaft.

Abstract: A kit of modular prosthetic hip components includes a first neck having a coupling element thereon. First and second hip stems each have a coupling element at a proximal end thereof for connecting to the coupling element of the first neck. The first and second hip stems have a progressively larger medial-lateral dimension in a proximal portion thereof. The coupling element on each of the first and second hip stems is located at a different medial-lateral location thereon with the coupling element located more medially and proximally on the second stem than the first stem. The first neck forms an identical first neck angle with a proximal-distal axis of the respective first and second stems. The coupling elements on the first and second stems locate a head mounted on the first neck in the same proximal-distal location but a different medial-lateral location with respect to an acetabulum.

Abstract: A trochlear groove implant includes a body having an articulate-bearing surface, a bone-facing surface and an edge extending therebetween for repairing a trochlear groove. The articulate-bearing surface configured to mimic a portion of a normal trochlear groove. The implant further includes at least one anchoring mechanism extending outwardly from the body.