Revision hip implants and prosthesis systems

A revision implant system for a revision surgery on a hip area of a patient, comprising:

• an acetabular cup comprising a cup portion and a peripheral portion, the acetabular cup having a first surface configured to interface with the pelvic bone of the patient, the acetabular cup having a second surface facing away from the pelvic bone of the patient, at least a part of the second surface adapted to face a femoral component of a hip implant, the acetabular cup including a plurality of screw holes formed from the first surface to the second surface, the screw holes having a first diameter at the first surface and a second diameter at the second surface, the second diameter being greater than the first diameter, the plurality of screw holes having threaded inner surfaces;
• and
• a first screw having a shaft and a head, the shaft having a third diameter less than the first diameter of the screw hole, the head having a fourth diameter greater than the first diameter of the screw hole, the shaft having threads configured to engage the pelvic bone structure, the head having threads formed thereon and configured to engage the threaded inner surfaces of the screws holes in the acetabular cup;
• wherein the plurality of screw holes are a first plurality of screw holes formed in the peripheral portion of the acetabular cup, and wherein the acetabular cup further comprises a second plurality of screw holes formed in the cup portion and extending from a first surface of the cup portion to a second surface of the cup portion, the second plurality of screw holes having a first diameter at the first surface of the cup portion and a second diameter at the second surface of the cup portion, the second diameter being greater than the first diameter, the second plurality of screw holes having threaded inner surfaces;
• and
• a cup hole adapter having an outer threaded surface and an inner threaded surface, the outer threaded surface being configured to engage the threads of one of the second plurality of screw holes.

A method of performing a revision surgery comprising:

• introducing an the acetabular cup into a patient, the acetabular cup comprising a cup portion and a peripheral portion, the acetabular cup having a first surface configured to interface with the pelvic bone of the patient, the acetabular cup having a second surface facing away from the pelvic bone of the patient, at least a part of the second surface adapted to face a femoral component of a hip implant, the acetabular cup including a plurality of screw holes extending from the first surface to the second surface, the screw holes having a first diameter at the first surface and a second diameter at the second surface, the second diameter being greater than the first diameter, the plurality of screw holes having threaded inner surfaces;
• introducing a first screw through one of the plurality of screw holes and into the pelvic bone of the patient, the first screw comprising a shaft and a head, the head of the first screw being devoid of threads to define a non-threaded head;
• driving the first screw into the pelvic bone until the non-threaded head of the first screw securely engages the threaded inner surface of the one of the plurality of screw holes to capture the acetabular cup to the pelvic bone;
• introducing a second screw through one of the plurality of screw holes and into the pelvic bone of the patient, the second screw comprising a shaft and a head, the shaft of the second screw having a third diameter smaller than the first diameter of the screw hole, the head of the second screw having a fourth diameter larger than the first diameter of the screw hole, the shaft of the second screw having threads configured to engage the pelvic bone structure, the head of the second screw having threads formed therein and configured to engage the threaded inner surfaces of the screws holes in the acetabular cup;
• and
• driving the second screw into the pelvic bone until the threads on the head of the second screw engage the threaded inner surface within one of the screw holes in the acetabular cup such that the cup is further secured onto the pelvic bone.

A revision implant system for a revision surgery on a hip area of a patient, comprising:

• an acetabular cup comprising a cup portion and a peripheral portion, the acetabular cup having a first surface configured to interface with the pelvic bone of the patient, the acetabular cup having a second surface facing away from the pelvic bone of the patient, at least a part of the second surface adapted to face a femoral component of a hip implant, the acetabular cup including a plurality of screw holes formed from the first surface to the second surface, the screw holes having a first diameter at the first surface and a second diameter at the second surface, the second diameter being greater than the first diameter, the plurality of screw holes having threaded inner surfaces;
• a first screw having a shaft and a head, the shaft having a third diameter less than the first diameter of the screw hole, the head having a fourth diameter greater than the first diameter of the screw hole, the shaft having threads configured to engage the pelvic bone structure, the head having threads formed thereon and configured to engage the threaded inner surfaces of the screws holes in the acetabular cup;
• a hard bearing liner for engagement with the acetabular cup, the acetabular cup having a socket with an inner radius, the liner being introducible into the acetabular cup in a revision surgery, the liner having an inner surface and an outer surface, the liner being sized and shaped for insertion into the inner radius of the acetabular cup, the inner surface being arranged to interface directly with a femoral ball of a prosthetic implant, the outer surface being configured to face the inner radius of the acetabular cup;
• and
• surface features formed on the outer surface of the liner and protruding from the outer surface, the surface features being configured to provide gaps therebetween for accommodating cement, the surface features forming an outer radius substantially matching the inner radius of the socket of the acetabular cup, wherein said surface features are formed as a series of rows of alternating semi-cylindrical protrusions and dome protrusions.