7 results about "Acetabular liner" patented technology

A hip implant system includes an artificial acetabular cup and an artificial acetabular liner. The liner includes or consists of a metal or an alloy, and is coated at least in sections with a ceramic coating.

A prosthetic acetabular liner including a wall that extends from an apex portion to a circumferential rim portion, the wall having: a convex outer surface; a threaded spigot extending outwardly from the apex portion; a concave inner bearing surface; and an opening surrounded by the circumferential rim portion. The liner is rotatably insertable into an acetabular outer shell having a corresponding threaded apical hole, and rotation of the liner in the shell causes the threaded spigot to engage the threaded apical hole and thereby draw the liner into the shell.

The utility model discloses an air pressure hip joint which comprises an acetabular cup, an acetabular liner is movably arranged on one side of the acetabular cup, a femoral head prosthesis is movably arranged on one side of the acetabular liner, the femoral head prosthesis is integrally spherical, one side of the femoral head prosthesis is a plane, a center hole is formed in the plane side of the femoral head prosthesis, and a femoral stem prosthesis is movably arranged in the center hole. A central hole is formed in the femoral head prosthesis, an air pressure cavity is formed in the inner wall of the femoral head prosthesis in the axial direction, the air pressure cavity is communicated with the central hole of the femoral head prosthesis, a micro air pump is fixedly arranged on the inner wall of the femoral head prosthesis, and a pressure sensor is fixedly arranged on the inner wall of the air pressure cavity. The air pressure in the hip joint is accurately adjusted, the air pressure is properly reduced, the pressure between articular surfaces is reduced, and wound healing is facilitated; in the later period of rehabilitation, along with recovery of the joint function of the patient, the air pressure can be gradually increased, the stability and supporting force of the joint are improved, and the patient can better adapt to daily activities.

The application discloses a kind of acetabular assembly, hip joint prosthesis and assembly method, a kind of acetabular assembly, comprising: acetabular outer cup and acetabular liner;Acetabular outer cup includes first cup body, first cup body is formed around first containing space, first cup body is provided with anti-rotation groove, anti-rotation groove extends from the cup mouth end surface of the first cup body to the inner wall of the first cup body;Acetabular liner includes second cup body, second cup body can be contained in first containing space, the outer wall of second cup body is provided with anti-rotation part, and anti-rotation part can be matched in anti-rotation groove;Acetabular assembly can be in the relatively stable pre-placed state between acetabular outer cup and acetabular liner, in pre-placed state, in the direction of the axis of first cup body inward, part of anti-rotation part enters anti-rotation groove.In the application, the probability that anti-rotation part is abraded or the degree that anti-rotation part is abraded can be reduced in the process of acetabular assembly assembly.

The application relates to a lower limb length determination method, device and computer equipment based on hip replacement, which comprises the following steps: acquiring a medical image of a hip joint part, determining a position of an anterior superior iliac spine and a position of a lesser trochanter from the medical image; acquiring a center position of an acetabular liner according to a first optical tracker array installed on an acetabular cup assembly device, and acquiring a ball center position of a femoral head prosthesis according to a second optical tracker array installed on a femoral stem prosthesis; obtaining a pelvic side lower limb length according to the position of the anterior superior iliac spine and the center position of the acetabular liner; obtaining a femoral side lower limb length according to the position of the lesser trochanter and the ball center position of the femoral head prosthesis; and obtaining a target lower limb length based on the pelvic side lower limb length and the femoral side lower limb length. The method can avoid the problem of inaccurate lower limb length calculation caused by the disengagement of the prosthesis ball center from the liner center in hip joint surgery, and improves the accuracy of the determined lower limb length.

A new type of artificial sitting, iliofemoral ligament and matching anti-dislocation total hip joint prosthesis, including artificial ligament, acetabular cup, acetabular liner and artificial femoral head, the acetabular liner is sleeved with acetabular cup outside, the acetabular liner is a semispherical shape with a plane surface, the center of the plane surface is provided with an inwardly concave joint cavity, the artificial femoral head is inserted into the joint cavity with interference, constituting a movable structure, a plurality of outward ligament fixing holes are arranged on the periphery of the plane surface of the acetabular cup, a nail channel is arranged on the femoral stem of the artificial femoral head, the ligament sleeve ring of the artificial ligament is fixed in the ligament fixing hole through the fixing device, the tail line of the artificial ligament passes through the nail channel on the femoral stem and is fixed on the femoral stem through the locking nail, constituting an anti-dislocation structure; the present application has the advantages of simple structure, close to human physiological structure, low production cost, easy production and manufacturing, can prevent dislocation, solves the pain caused by prosthesis dislocation to patients and doctors, and has significant social and economic benefits.

The invention discloses an anti-dislocation artificial hip joint prosthesis system and a use method thereof, and belongs to the technical field of medical equipment. In the anti-dislocation artificial hip joint prosthesis system, a first magnet module is fixedly arranged on the inner side wall of an acetabular cup; the acetabular lining is fixed in the acetabular cup, and the first magnet module is located between the acetabular lining and the acetabular cup; the femoral head is fixedly connected with the front end of the femoral stem; a second magnet module is fixedly arranged in the femoral neck portion of the femoral stem, the femoral head is assembled into the acetabulum lining, and the first magnet module and the second magnet module attract each other. The first magnet module and the second magnet module are additionally arranged between the acetabular lining and the acetabular cup and in the femoral neck of the femoral stem respectively, and on the premise that the friction interface of the acetabular cup and the femoral head is not affected, the friction force between the acetabular cup and the femoral head is greatly improved based on the attraction effect between the first magnet module and the second magnet module. And joint dislocation complications easily caused by the acetabular cup and the femoral head under the traditional mechanical coupling effect are greatly reduced.