Patent ID: 6086614
Filing Date: 2000-07-11
Classification: A61B,A61F

Abstract:
An implantable orthopedic prosthesis comprising:a screw having a longitudinal axis, a threaded shank, and a head with an end surface and a plurality of splines, wherein said splines extend upwardly along said longitudinal axis in a first position and have a first end that is rigidly connected to said end surface and an elastic second end that deflects in a radial direction toward said longitudinal axis;a first implantable prosthetic element having a threaded bore for receiving said threaded shank of said screw in threaded engagement;a second implantable prosthetic element having a shoulder-stepped bore for receiving said threaded shank therethrough and for engaging said head, said shoulder-stepped bore adapted to deflect the splines in a radial direction away from the first position, the shoulder-stepped bore including an annular groove for receiving said splines of said head and defining a shoulder for engaging said splines to prevent backout of said screw, the splines returning to the first position in the annular groove.