62 results about "Hip implant" patented technology

A case for modular neck components for hip implants. The case may include indicators based on independent variables associated with physical characteristics of the implant, including leg length, offset, and anteversion. During surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g., leg length, offset, and/or anteversion. The case allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. A method described herein may include preoperative planning in which a template including a grid coordinate system is used, which advantageously provides an intuitive system for the surgeon both preoperatively and during surgery.

A trial system for an acetabular prosthesis is described. The acetabular prosthesis is generally for implantation in an acetabulum and surrounding pelvis. The acetabular prosthesis includes an acetabular cup having a substantially concave inner surface and a substantially convex outer surface. The described acetabular prosthesis is especially useful in revision hip implant procedures where significant bone tissue loss has occurred either in or around the acetabulum and/or the pelvis. A collection of trial shells are provided to trial a range of motion of the hip joint before implanting a prosthetic shell into the acetabular prosthesis.

An orthopedic device is disclosed for restoring the normal or natural joint mechanics in, for example, a hip joint. The device includes a first component, such as an acetabular component in a hip implant, that includes a convex articulation surface and a second component, such as a femoral component in a hip implant, that includes a concave articulation surface. It will be appreciated that the convex articulation surface of the device disclosed herein articulates with the concave articulation surface in a mating engagement that may be reversed with respect to the traditional hip implant, in which the concave articulation surface is part of the acetabular component and the convex articulation surface is part of the femoral component.

An implant for improved engagement between modular components is provided. The implant includes a body member for insertion, in use, in a natural femoral neck; and a rod for insertion, in use, in the intramedullary canal of a femur. The body member has a first engagement surface and the rod has a second engagement surface such that the first and second engagement surfaces are configured for complementary engagement with each other. One of the first or second engagement surfaces may be a protrusion while the other of the first or second engagement surfaces may be a recess for receiving the protrusion. The implant may further include a locking member, a stabilizing member and a guide means. A domed head portion is provided for attachment to a medial end of the body member and insertion, in use, in a natural or prosthetic acetabulum.

A femoral component of a hip implant is disclosed. The femoral component may be used specifically in a neck sparing resection (i.e., any process or device that avoids removing the femoral neck) and may include a shortened stem (with respect to a conventional stem) having a terminal flare portion for internally contacting a medial calcar portion of the proximal femur, and a significant curvature on its medial side. Other features of the femoral component include, flat side portions on the anterior and posterior sides of the stem, a lateral fin or a wing or T-back to aid in resisting torsional forces. The femoral component may also include a sagittal slot for proper fitting and placement in the femoral canal. The femoral component may also include a neck component that is modular with respect to the stem component. A head component, whether monoblock or modular with respect to the neck component, may also be utilized as part of the femoral component.

Implants are made of materials having asymmetric modulus gradients. For example, an implant, such as a hip implant, is made of a material having a stiffness gradient between a proximal portion near a hip joint and a distal portion extending downward into the marrow of the femur. Among other benefits, the asymmetric modulus gradient mitigates problems associated with stress shielding and does not excessively wear or deteriorate the proximal portion of the implant.

A hip implant assembly including a spherical shaped ball and an elongated stem. An annular defining rim separates the ball from the stem and abuts, in a maximum inserting condition, over an exterior reconditioned surface of the femur and upon inserting the stem within an interior passageway formed within the femur. A cup shaped support seats the ball in a universally articulating permitting fashion via a flexible and resilient ligament which extends from the ball and is received within a recess passageway of the cup. The cup also includes a mounting surface with a central projecting portion which is in turn resistively fitted within an undercut defined recess formed in the ilium bone in communication with a base surface of the reconditioned acetabulum socket. A corresponding installation kit assists the preparation of the femur and ilium bones defining the hip joint, as well as the installation of the implant body into the upper conditioned femur end and the cup shaped and outer socket support to a reconditioned acetabulum defined in the ilium bone.

The femoral hip implant is defined by a femoral ball and a femoral stem. The femoral stem has a proximal end, a distal end and a length. The femoral stem extends from the femoral ball and terminates at the distal end. The femoral stem is arranged and configured to be received by a femur bone. A method of use is also provided.

Revision hip implants and prosthesis systems include femoral heads, cups, screws, bridges, and segmental prostheses for revision surgeries.

A total hip implant system comprising: a prosthetic femoral component having a head with a part-spherical bearing surface; and a dual mobility acetabular cup system comprising a first bearing component made of ultra high molecular weight polyethylene mounted on the head, the first bearing component having a part-spherical inner bearing surface rotatably engaging the part-spherical bearing surface of the head, and having a part-spherical outer bearing surface, a second bearing component made of polyetheretherketone (PEEK) having an inner part-spherical bearing surface rotatably engaging the part-spherical outer bearing surface of the first bearing surface.

A system for facilitating the removal of a prosthetic hip implant from a femur. The explant system has at least one blade coupled to a handle. The shape of the blade conforms to a portion of the implant so that a cutting tip of the blade can be positioned in a desired position relative to the implant and the femur. A plurality of blades can be provided, each blade configured to conform to a different portion of the implant. Force is applied to the handle so that the cutting tip of the blade cuts through bone growth from the femur into the implant, thereby facilitating removal of the implant.

The present invention relates to a system and method for objective, real-time acoustic measurement and feedback for proper fit and fill of hip implants during total hip replacement surgery, or other bone implant surgical procedures.