19 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 invention discloses a hip joint prosthesis, and belongs to the technical field of medical prostheses, the hip joint prosthesis comprises a femoral stem, a metal ball head and an acetabulum, the acetabulum is composed of a full-dome hemispherical acetabulum outer cup and an acetabulum lining which are mutually sleeved, and the top of the femoral stem is provided with a connector through an insertion rod for sleeving the metal ball head; the top of the metal ball head is inserted into the acetabular lining, an anti-rotation structure is arranged between the acetabular outer cup and the acetabular lining, a longitudinal groove is formed in the side wall of the femoral stem to increase the contact area between a bone and the femoral stem, a transverse groove used for preventing a prosthesis from sinking is formed in the inner side of the neck of the femoral stem, an acetabular screw is arranged on the acetabular outer cup in a penetrating mode, and the acetabular screw is connected with the acetabular outer cup. The end of the acetabulum screw is located between the acetabulum outer cup and the acetabulum lining, the acetabulum screw is specifically a titanium alloy self-tapping screw, the top of the acetabulum screw is provided with a cutting groove, the top end of the acetabulum screw is designed to be a blunt end, the outer surface of the femoral stem and the outer surface of the acetabulum outer cup are rough surfaces, and the acetabulum joint is high in strength and stability and low in abrasion rate.

The utility model relates to an acetabulum lining clamping installer which comprises a clamping piece and a separating piece, the clamping piece comprises a column body and a plurality of clamping jaws extending from the peripheral face of the column body in the radial direction, the column body is provided with a through hole penetrating in the axial direction, each clamping jaw comprises a clamping face matched with the outer surface of an acetabulum lining, and the separating piece is arranged on the clamping face. The acetabulum lining can be clamped and fixed through the clamping faces of the multiple clamping jaws. The separation piece comprises a spherical segment part matched with the inner surface of the acetabulum lining and a rod part extending out of the middle of the spherical segment part in the axial direction; the rod portion of the separating piece is located in the through hole of the column body, the separating piece can move in the axial direction of the column body to enable the acetabular lining to be separated from the clamping piece, and the acetabular lining can be conveniently installed in an acetabular cup.

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 invention belongs to the technical field of medical and industrial cross correlation, and particularly relates to a method for preparing an integral ceramic / metal acetabulum by adopting additive manufacturing, which comprises the following steps: S1, powder mixing: uniformly mixing alumina powder, zirconia powder and other additives; s2, performing three-dimensional modeling on the acetabulum; s3, 3D printing is conducted, specifically, an acetabulum blank is printed through a binder spray forming technology; s4, curing and sintering the acetabulum blank, namely curing, cleaning and sintering the printed acetabulum blank at high temperature, S5, smelting and pouring titanium alloy, namely putting the acetabulum and the titanium alloy into a vacuum induction furnace, and smelting the titanium alloy; and S6, post-treatment, wherein redundant materials are removed through various machining technologies. The method has the beneficial effects that the bonding strength of the ceramic acetabular lining and the metal acetabular prosthesis is enhanced, the acetabular toughness is improved, the acetabular thickness is reduced, and the acetabular diameter is increased; and the prepared novel acetabular product can effectively prolong the service life of the hip joint prosthesis and prevent a patient from suffering from joint revision surgery.

There is provided an acetabular cup liner for a total hip replacement (THR) prosthesis comprising an inner surface with a hemispherical portion having a radius of curvature. The hemispherical portion is disposed about a centerline and it intersects a hemisphere plane perpendicular to the centerline so that the intersection of the hemispherical portion and the plane define a circle having a radius equal to the radius of curvature. The liner further comprises a capture portion continuous with the hemispherical portion that has the same radius of curvature as the hemispherical portion and connects with the hemispherical portion at the hemispherical plane along a first arc of the circle on the plane, and extends a first distance out of the plane. The liner further comprises an insertion portion continuous with the hemispherical portion. The insertion region is connected with the hemispherical portion along a second arc of the circle on the plane. The distance from the centerline to the insertion portion is greater than the radius. The cup liner constrains the femoral ball portion of the THR prosthesis. The femoral ball portion is engaged with the liner by orienting the ball at an angle so that the shoulder portion of the ball aligns with the insertion portion, pressing the ball into the liner, and orienting the ball away from the angle.

The present invention relates to a hip joint prosthesis and an acetabular liner. The acetabular liner includes an acetabular cup and at least two acetabular liners. The surface tapers of different acetabular liners are different, and each acetabular liner is provided with an articular surface for cooperating with the femoral head, and the central positions of the articular surfaces of different acetabular liners are different. The acetabular cup is provided with a receiving cavity for accommodating any one of the acetabular liners, and at least two dividing areas with different tapers are formed on the cavity wall of the receiving cavity, and a dividing area with one taper matches an acetabular liner with a specific surface taper. The above acetabular prosthesis has high versatility and can be suitable for patients with different eccentric distances.

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.

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 present invention provides an acetabular liner operating device and a method for using the acetabular liner operating device. The acetabular liner operating device includes an operating rod, a suction cup assembly, and a limit assembly. The suction cup assembly provided at the first end of the operating rod is used to adsorb the inner wall of the acetabular liner, and the limit assembly is used to limit the freedom of the acetabular liner toward the second end of the operating rod. With such a configuration, the inner wall of the acetabular liner is adsorbed by the suction cup assembly, which will not cause scratches or damage to the inner wall of the acetabular liner. The setting of the limit assembly limits the freedom of the acetabular liner toward the second end, thereby avoiding the problem that the acetabular liner is easy to shake and difficult to position when the suction cup assembly is used to adsorb the acetabular liner. In this way, the acetabular liner can be conveniently and reliably adsorbed and operated by using tools, which can help surgical personnel to accurately and quickly install the acetabular liner during surgery, shorten the operation time, and reduce the risk of damage to the surface of the acetabular liner.

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.