32 results about "Joint replacement prosthesis" patented technology

Devices and surgical methods treat various types of adult spinal pathologies, such as degenerative spondylolisthesis, spinal stenosis, degenerative lumbar scoliosis, and kypho-scoliosis. Various types of spinal joint replacement prostheses, surgical procedures for performing spinal joint replacements, and surgical instruments are used to perform the surgical procedures.

The invention provides an artificial femur stem which comprises a neck part and an anchoring part and is characterized in that an inside curve of the anchoring part is an anatomical curve of a corresponding part of an AVN patient. The invention also provides an artificial total hip joint replacement prosthesis which comprises the femur stem. The femur stem is highly matched with femoral medullary space of the patient and can enhance the long-term stability of the replacement prosthesis.

A prosthetic tibial insert comprises a tibial tray insert including a stabilizing post, where the centerline of the stabilizing post is offset from at least one of an anterior-posterior centerline and a medial-lateral centerline of the tibial tray insert. A method of imparting axial rotation comprises shifting the axis of axial rotation between a tibial prosthesis and a femoral prosthesis by providing at least one of offsetting a stabilizing post associated with a tibial insert, increasing the radii of a medial receiver of the tibial insert, and increasing conformity between a medial receiver of the tibial insert and a medial condyle.

The invention relates to an artificial temporal-mandibular joint replacement prosthesis. The replacement prosthesis comprises a glenoid fossa prosthesis and a mandible ramus prosthesis; the glenoid fossa prosthesis is made of supra polymer polyethylene polymer and comprises a tissue surface in contact with the glenoid fossa and a function surface in contact with the mandible ramus prosthesis, the tissue surface comprises a wing plate which is in contact with the zygomatic arch and is fixed to the zygomatic arch and a protrusion part in contact with the glenoid fossa, and the function surface comprises a sunken part in contact with the mandible ramus prosthesis and stopping plates arranged at the two ends of the sunken part; and the mandible ramus prosthesis comprises a condyloid process head and a mandible ramus fixing handle, the condyloid process head is cylindral and is in contact with the sunken part, the mandible ramus fixing handle is attached to the outer lateral face of the mandible ramus. By means of the artificial temporal-mandibular joint replacement prosthesis, the standard form artificial joint prosthesis is more suitable for the dissection appearance of the Chinese and is better attached to the jaw, complications in and after an operation are effectively reduced, the using effect of the standard form artificial joint prosthesis is improved, and the service life of the standard form artificial joint prosthesis is prolonged.

The invention discloses an artificial knee joint replacing prosthesis capable of reserving and rebuilding anterior cruciate ligament, in order to solve the problems that the existing artificial knee joint prosthesis technology can not reserve the healthy anterior cruciate ligament of the patient, or that even if reserving the anterior cruciate ligament, the anchoring area of the prosthesis and the tibiae part is reduced and the operation is difficult. The artificial knee joint replacing prosthesis comprises a tibiae platform holding part and a liner, the tibiae platform holding part comprisesa horizontal stand and a fixed connection structure fixedly connecting the horizontal stand and the tibiae, the liner also has a channel for anterior cruciate ligament to pass through, the tibiae platform holding part is provided with a pore passage for penetrating upper and lower surfaces of the horizontal stand of the tibiae platform holding part, the size of the pore passage can be suitable for the imbedded anterior cruciate ligament and adhesive bone block thereof to pass through; the artificial knee joint replacing prosthesis also comprises an anti-disengage structure preventing the imbedded bone block from disengaging. The artificial knee joint replacing prosthesis of the invention not only can reserve or rebuild the anterior cruciate ligament, but also can reserve the large anchoring area, simultaneously the surgery operations is convenient.

The present application relates to a knee joint replacement prosthesis, which relates to the field of medical devices, including the femoral condyle, the tibial tray and the tibial pad between the femoral condyle and the tibial tray, the section of the tibial pad is semicircular, and the tibial pad includes The engaging portion matched with the tibial tray and the abutting portion fixedly connected to one end of the engaging portion, the tibial tray is provided with a placement groove for the engaging portion to be embedded in. This application has the advantage that when the fixed platform prosthesis is used for knee arthroplasty, the optional models of the femoral condyle can be increased, the coverage of the femoral condyle can be improved, and the fixation of the tibial pad is more firm, reducing the microscopic damage caused by the tibial pad. Movement reduces wear on the tibial pad and reduces the probability of prosthetic failure.

The invention relates to the field of medical apparatuses and instruments, in particular to a joint replacement prosthesis. The joint replacement prosthesis comprises a prosthesis head part and a prosthesis lower part which are integrally formed, wherein the prosthesis head part is in an epiphysis shape, the prosthesis lower part is in a rod shape, both the prosthesis head part and the prosthesislower part are hollow structures made from non-degradable polymer materials, and the surface of the joint replacement prosthesis is sequentially covered with a non-degradable metal layer and a degradable metal layer. The joint replacement prosthesis is characterized in that the non-degradable metal layer is formed through physical vapor deposition or chemical vapor deposition. The joint replacement prosthesis meets the light-weight corrosion-resistant basic requirements, and also has the good osteocyte attachment capacity, and good combination between the joint replacement prosthesis and bonetissue can be achieved in short time when the prosthesis is implanted.

Devices and methods for aiding practitioners in the implementation of arthroplasty prosthetics. Example devices may include a base and an alignment arm, and may be used for finding and recording the native alignment of a bone head, such as the femoral or humeral head. The base may be attached to the bone and the alignment arm may be adjusted to reflect the native alignment of the bone. Once the alignment is recorded, the native bone head may be removed and the prosthetic bone head may be attached to the bone, and properly oriented using the alignment arm of the device.

The invention provides a multifunctional elbow joint replacement prosthesis which comprises a humerus assembly, an ulna assembly, a radius assembly and a pin shaft assembly. The humerus assembly comprises a humerus handle, a yoke and a capitulum humeri. The ulna assembly comprises an ulna handle, an ulna neck and an ulna head. The radius assembly comprises a radial head and a radial bone marrow needle. The pin shaft assembly comprises a pin shaft outer nail of a hollow barrel structure and a pin shaft inner nail inserted into the pin shaft outer nail. One end of the pin shaft inner nail is provided with an anti-disengagement piece used for preventing the whole pin shaft inner nail from entering the pin shaft outer nail. The other end of the pin shaft inner nail is provided with a locking piece. The pin shaft assembly enables the ulna assembly to pivot around a shaft and fixes the capitulum humeri to a first convex lug. The multifunctional elbow joint replacement prosthesis accords with human body daily behavior movement characteristics, has the good stability and safety, can achieve partial replacement or whole replacement, improves biocompatibility with the sclerotin, and is not likely to cause looseness or infection or instability or other complications and long in service life.

An intracorporeal portion of a percutaneous device for a joint disarticulation prosthesis or joint replacement prosthesis, the intracorporeal portion having an extracorporeal portion or having means for rigidly coupling directly to an extracorporeal portion, the extracorporeal portion being for location exterior to the skin, the intracorporeal portion having an articulating component for articulating with an articulating surface, wherein the articulating component is intracorporeal when installed in a human or animal subject.