Hip arthroplasty implants
AssigneeGlobus Medical, Inc.
InventorsJohn Loiacono, Kenny Chen, Pasquale Petrera
Life of this patent
Estimating the term…
Abstract
Apparatus and method of removing a liner attached to an implanted acetabular shell. A surgical site is accessed where the acetabular shell has already been implanted into a patient. A rim plate having a through opening is placed over the acetabular shell. A pilot hole is then drilled into the attached liner through the opening in the placed rim plate. After the drilling, the rim plate is removed to expose the drilled hole. A removal tool is inserted into the drilled pilot hole. The attached liner is then disengaged from the implanted acetabular shell with the inserted removal tool.
Claims13
An apparatus for separating a femoral head that has been inserted into a mobile insert adapted to be received in an acetabular shell, the apparatus comprising:
- an impactor having an impaction tip sized to be inserted into a central impactor opening at a bottom of the mobile insert to push against the inserted femoral head;
- a removal base having a circumferential wall defining an upper surface adapted to receive an upper portion of the mobile insert having the inserted femoral head, the circumferential wall defining a central removal opening having a larger diameter than an exterior diameter of the femoral head, but smaller than an exterior diameter of the mobile insert, the central removal opening further including a tapered region below to catch the femoral head when the femoral head separates from the mobile insert as a result of an impaction to the femoral head with the impaction tip.
An apparatus for separating a trial femoral head that has been inserted into a trial mobile insert adapted to be received in an acetabular shell, the apparatus comprising:
- an impactor having an impaction tip sized to be inserted into a central impactor opening at a bottom of the mobile insert;
- a removal base having a circumferential wall defining an upper surface adapted to support an upper portion of the trial mobile insert having the inserted trial femoral head, and a central removal opening having a larger diameter than an exterior diameter of the trial femoral head, but smaller diameter than an exterior diameter of the trial mobile insert.
Dependencies are inferred from the claim text.