Orthopedic implant insertion instrument

摘要

A surgical instrument is disclosed that facilitates the implantation of one of a number of differently sized or differently configured hip stem prostheses into a proximal end of a femur while also providing a surgeon with a substantial amount of rotational control over the prosthesis during the implantation. A suitable hip stem prosthesis is selected from a family of hip stem prostheses of varying sizes and dimensions. The surgical instrument attaches to the selected hip stem prosthesis via first and second spaced engagement portions such that the instrument is operable to exert rotational control over the selected hip stem prosthesis. The first engagement portion is an impaction portion configured to engage a corresponding impaction feature on a proximal body portion of the hip stem prosthesis. The second engagement portion is an adjustable clamping portion configured to clampingly receive the neck of the hip stem prosthesis, regardless of the prosthesis size.

主权项

1. A surgical instrument for use with a prosthesis, comprising:
a body having a bore extending through at least a portion of the body, the bore defining a longitudinal axis; a first engagement portion external to, and extending from, the body, the first engagement portion aligned substantially along a first axis; a second engagement portion configured to encircle a neck portion of a prosthesis, the second engagement portion external to the body and spaced from one or both of the longitudinal axis or the first axis; an adjustment arm having a first end and a second end, opposite the first end, the first end of the adjustment arm pivotally attached to the second engagement portion; an adjustment block disposed within the bore, the second end of the adjustment arm pivotally attached to the adjustment block; and a threaded rod configured to rotate about the longitudinal axis adjustment block threadingly connected to, and longitudinally displaceable along, the threaded rod, wherein the first engagement portion and the second engagement portion are disposed to contemporaneously engage, respectively, a proximal body portion and the neck portion of the prosthesis.