9 results about "Acetabular shell" patented technology

Methods provide computer-navigation assisted total hip arthroplasty (THA) procedures. Such procedures include the use of a navigated instrument, e.g., a navigated reamer construct or a navigated inserter construct to prepare the acetabulum and insert an acetabular shell, a camera tracking system adapted to track a pose of the navigated inserter or reamer construct relative to the patient in use, and a computer platform adapted to receive pose tracking information and generate and display navigational guidance for the user.

The present application relates to a method for planning placement of an acetabular shell in a total hip arthroplasty (THA) procedure. Functional alignment of a 3D image of a pelvis includes identifying reference points on each 2D image of a weight-bearing pelvis, identifying corresponding reference points on a 3D image of the pelvis in a non-weight-bearing position, constructing a reference on the 2D images based on the reference points on each respective 2D image, constructing a corresponding reference on the 3D image based on the reference points on the 3D image, and aligning the corresponding reference of the 3D image with the references of the 2D images to provide a functionally aligned 3D image to more accurately plan placement of the acetabular shell.

An orthopaedic surgical instrument may include an elongated body with an implant end and an impactor end. A latch lever may be pivotally coupled to the elongated body. The latch lever may be moveable between an open position and a latched position in which the latch lever is retained within the body. An acetabular shell component may be rigidly attached to the implant end of the elongated body. An automated surgical impactor may be attached to the impactor end.

The utility model discloses a novel anti-loosening hip joint prosthesis which comprises a femoral stem, a femoral head is installed at the top end of the femoral stem, an acetabulum shell is installed at the top end of the femoral head, the femoral stem comprises a femoral skeleton and a connecting assembly, the connecting assembly is installed in the femoral skeleton, and a first connecting shell is installed at the top end of the connecting assembly. A plurality of length strips are fixedly installed at the bottom end of the femoral head, a sliding block is fixedly installed on one side of each length strip, a plurality of sliding grooves are formed in the first connecting shell, and the sliding blocks are connected with the sliding grooves in a sliding mode respectively. By arranging the length strip, the sliding block and the sliding groove formed in the first connecting shell, the connecting area of the femoral head and the first connecting shell is increased, the connecting stability of the femoral head and the first connecting shell is improved, the phenomenon that the hip joint prosthesis gets loose is avoided, and the service life of the hip joint is prolonged.

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.

An orthopaedic implant includes an acetabular bearing and an acetabular shell component. The bearing includes a convex outer surface having a hemispherical surface, a curved lead-in surface, a flat flange surface, a curved relief surface, and a flat tapered surface. The curved relief surface extends inward relative to the flat tapered surface, and the flat flange surface extends outward relative to the flat tapered surface. The shell component includes a concave inner surface having a tapered surface configured to engage the tapered surface of the bearing. An annular groove is defined in the concave inner wall of the shell component and is configured to receive the flat flange surface. Methods for assembling and using the prosthetic implant are also disclosed.

The present disclosure relates to a trial liner assembly comprising a trial liner, a fastener and a locking member. The trial liner comprises a bearing portion on an inner surface and a first channel extended distally from a center of the bearing portion. The first channel comprises a bottom face. The fastener is removably disposed within the trial liner and is configured to detachably couple the trial liner with at least one of a trial acetabular shell or an implant acetabular shell. The locking member is removably disposed in the first channel and is configured to prevent displacement of the fastener in the proximal direction, wherein at least a portion of the fastener resides between the locking member and the bottom face.

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.

The invention provides a reverse hip joint prosthesis, and belongs to the field of medical instruments. Comprising an acetabular shell, a ball head and a thighbone assembly. The device comprises an acetabulum shell and is characterized in that a ball head is arranged on the inner side of the acetabulum shell, a thighbone assembly is arranged on the side, away from the acetabulum shell, of the ball head and comprises a thighbone stem, a double-acting cup and a middle lining, the double-acting cup is fixedly connected to the top of the thighbone stem, and the middle lining is embedded in the side, away from the thighbone stem, of the double-acting cup; the side face, close to the ball head, of the middle lining is a smooth face, and the middle lining is connected with the ball head in a sliding mode. The trans-hip joint prosthesis is achieved through the acetabulum shell, the ball head and the thighbone assembly, a higher abduction angle and forward inclination are achieved, suboptimal positioning is compensated through the wide design, the movement range and stability can be kept, the collision possibility is reduced, and meanwhile the balance relation among component placement, abrasion and stability is optimized.