Orthopedic Instrument, System and Method for Implanting an Acetabular Cup

摘要

An orthopedic instrument for installing a new reverse hip prosthesis, particularly the acetabular cup thereof, wherein the cup can be affixed to the pelvis with or without screws. The acetabular cup is releasably attached to the instrument and the instrument is used to position the cup in the pelvis. Optional screw guides are provided in the instrument in case the surgeon wishes to use screws to affix the cup to the pelvis.

主权项

1. An orthopedic instrument for implanting an acetabular cup having a surface for attachment to an acetabular socket in a pelvic bone and a concave surface having an acetabular cup stem affixed therein and projecting outwardly therefrom, the concave surface further comprising a circumferential groove located in proximity to a circumferential edge of the acetabular cup, the orthopedic instrument comprising
a handle comprising a shaft having an impactor head at a proximal end and an axially disposed first threaded annular portion at a distal end, an acetabular impactor having a hemispherical head at a distal end and an axially disposed second threaded annular portion at a proximal end, the second threaded annular portion being screwed into the first threaded annular portion removably affixing the handle to the acetabular impactor, the hemispherical head being configured to couple to the acetabular cup, the hemispherical head comprising an annular recess to receive the acetabular cup stem and retaining tabs configured to releasably engage the circumferential groove.