Thrust plate hip prosthesis

Details Thrust plate hip prosthesis Thrust plate hip prosthesis

2005-08-26

2009-08-04

Sweet, Thomas J (Department: 3774)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

C623S022420, C623S022440, C623S022460

Reexamination Certificate

active

07569075

ABSTRACT:
A hip joint prosthesis that has a strap plate and a hollow, tapered femoral neck subassembly. The femoral neck includes a flanged force plate that radiates from a head stem base and abuts the femur. Several longitudinal ridges and/or an annular recess or other surface treatment at the head stem base facilitates retention in the femur. Shaped surfaces of a femoral neck at the strap plate interlock in non-rotational engagement with a bore of the head stem base. A tapered stem projects from the force plate and supports a ball head. The strap plate includes laterally and longitudinally displaced elongated fastener holes and stress relieving recesses and/or channels. Fasteners anchor the strap plate to the femoral shaft. A shouldered bolt mounts through the femoral neck to engage the ball head base and draw the ball head base and ball head toward the strap plate and contain the prosthesis to the femur.

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H.A.C. Jacob, Biomechanical Principles and Design Details of the Thrust Plate Prosthesis, p. 37.

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