12 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.

A tool assembly for extracting a liner from a prosthesis comprising an impactor and a faceplate. The impactor can be configured to receive and transmit a force. The faceplate can be configured to deliver the force from the impactor to the prosthesis to separate the liner from a shell of the prosthesis.

The application discloses a kind of acetabular cup prosthesis, by acetabular cup, rotating outer ring, rotating inner ring is composed.There are first, second, third openings in acetabular cup.Rotating outer ring is located in acetabular cup, it is equipped with the second channel with first ratchet, first channel and matched fixed block, and it is equipped with movable and second ratchet's outer fixed part.Assembly rotating inner ring is sleeved in outer ring, and three fixed blocks can slide in inner fixed part track, drive inner fixed part to rotate into acetabular cup, avoid interference acetabular liner installation.Inner ring is equipped with the fourth fixed block with third ratchet, can be engaged with outer fixed part, realize the synchronous rotation of inner and outer fixed part.Spring is arranged between inner and outer ring, and the resilience of inner ring can be realized.Inner ring is equipped with the driving structure with limiting rod, can be engaged by sliding shift ratchet state, complete the limiting and unlocking of rotating inner ring, realize the synchronous rotation recovery of inner and outer fixed part.

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 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.

The utility model discloses an acetabular lining driving guide ring which comprises an acetabular cup, an acetabular lining and a guide ring body, the acetabular lining is located in the acetabular cup, the guide ring body is located on the top of the acetabular cup, and one end of the acetabular lining is clamped on the guide ring body. The guide ring comprises a guide ring body, a plurality of inner notches are formed in the inner side of the guide ring body at equal intervals, and a plurality of outer notches are formed in the outer side of the guide ring body at equal intervals. The conical surface structure of the guide ring body is in interference fit with the outer side conical surface of the acetabular lining, the inner diameter of the guide ring body located on the conical surface structure is smaller than the outer diameter of the end portion of the acetabular lining, and the end face of the guide ring is flush with and attached to the end face of an acetabular cup. The driving guide ring is matched with the two parts, so that the conical surfaces of the two parts are effectively aligned in the process that the acetabular lining is driven into the acetabular cup, unbalance loading is avoided, and the problem that the ceramic acetabular lining is broken due to uneven stress is solved; the elasticity of the guide ring is improved through the notches, and the guide ring can automatically fall off in the process that the acetabular lining is beaten into the acetabular cup.

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 relates to the technical field of medical instruments, in particular to an acetabular lining with adjustable eccentricity, which comprises a lining body, the center of an acetabular fossa of the lining body deviates in the concentric circle direction relative to the center of the outer surface of the lining body, and the thickness of the bottom of the lining is increased in a gradient manner in the deviation direction. According to the acetabular side eccentric distance adjusting device, the proper offset direction and offset can be selected according to the specific anatomical structure of a patient, the success rate of an operation and the postoperative comfort of the patient are improved, the acetabular side eccentric distance adjusting device is compatible with an existing acetabular cup locking mechanism, the design of the acetabular cup does not need to be changed, the operation cost and complexity are reduced, and the acetabular side eccentric distance is directly adjusted. The lining has the advantages that insufficient lateral eccentric distance of the femur is counteracted, dislocation risk is reduced, excessive osteotomy or use of a long-neck femoral head is not needed, unequal lengths of limbs after operation are reduced, the thickness of the bottom of the lining body is increased in a gradient mode in the deviation direction, overall mechanical stability of the lining after deviation is guaranteed, and risks of loosening and abrasion of the lining are reduced.

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.