82 results about "Acetabulum prosthesis" patented technology

An acetabular prosthesis assembly (1) comprising an acetabular cup (3) with a generally convex outer surface for engaging acetabular bone and a generally concave inner surface, an insert (10) capable of insertion in the cup (3) for receiving a femoral head component, wherein a wear liner (13) is disposed between the cup (3) and the insert (10), the liner (13) providing a wear inhibiting surface (4a).

A method of making a custom acetabular implant for a patient. The method comprises acquiring and analyzing tomography data of the patient, and obtaining geometry and measurement parameters of the patient's pelvic anatomy. A standard acetabular prosthesis blank is selected from a plurality of pre-manufactured blanks, and includes a cup portion and at least one flange. The method includes shaping the blank acetabular prosthesis using a custom deforming fixture such that the shaped acetabular prosthesis has a final shaped geometry and measurement parameters to substantially match the patient's pelvic anatomy relative to the patient's acetabulum.

The invention belongs to the technical field of designing and manufacturing of prosthesis and relates to semi-pelvic prosthesis. The semi-pelvic prosthesis is characterized by being formed by connecting an ilium fixing part, acetabulum prosthesis, and a pubis connection part, wherein the ilium fixing part is used for being connected and fixed with a residual iliac wing and sacrum; the pubis connection part is used for being connected and fixed with the residual pubis on the same side or pubis on an opposite side; the ilium fixing part and the acetabulum prosthesis are connected by a tapered rotation prevention clamp port; and the acetabulum prosthesis and the pubis connection part are fixed and connected by a bolt. The semi-pelvic prosthesis has the advantages that (1) compared with assembled prosthesis, hot bending forming integrated prosthesis is disperse in stress; (2) the semi-pelvic prosthesis and the residual iliac wing are fixed by a self-locking nail, and the sacrum and the residual pubis are fixed by a self-locking nail, so that loosening of the bolt can be effectively prevented; and (3) the semi-pelvic prosthesis is provided with a flat supporting structure, so that the interfacial stress between the prosthesis and the sacrum, and between the prosthesis and the pubis can be converted from shear force or tensile stress into pressure stress, the loosening or displacement of the prosthesis is prevented, the long-term stability of the prosthesis is facilitated, and the prosthesis cannot be broken easily when complex force is applied to a human body for a long time.

The invention belongs to the technical field of medical devices and discloses an acetabular prosthesis of an artificial hip joint with a rotational ellipsoid joint interface, which comprises an acetabular outer cup made of a cobalt/chrome/molybdenum alloy and an acetabular liner made of polyethylene. The liner of the acetabular prosthesis comprises a spherical outer surface and a rotational ellipsoid inner surface, wherein the radius of the spherical outer surface, i.e. the outside diameter of the liner, is equal to the subtraction of the thickness of the acetabular outer cup from the radius of the acetabular prosthesis outer cup; the length of the major axis of the rotational ellipsoid inner surface is equal to the subtraction of the thickness of the liner from the outside diameter of the liner; and the length of the minor axis of the rotational ellipsoid inner surface is equal to the multiplication of the length of the major axis by 0.98. A positioning groove and a clamping ring arearranged between the liner and the outer cup to achieve the effect of fixation. According to the shapes of acetabular fossa of different patients, the acetabular prostheses of different specifications are designed and manufactured so as to solve the problem of stress concentration on the joint interface of the spherical artificial hip joint in the prior art and meet the needs for individual treatment of different patients. Therefore, the acetabular prosthesis provided by the invention is truly put into effect in clinics.

The invention discloses a customized hip joint surgical positioning device based on medical images, a matched prosthesis and a positioning method. An eccentric positioning hole for positioning a short eccentric handle is formed in the acetabulum according to preoperative planning, meanwhile effectively cutting off damaged acetabular bone in the acetabulum based on a drilling nail corresponding to the central axis of an acetabulum prosthesis and achieving effectiveness and accuracy of the transplantation position of the acetabulum prosthesis. The positioning accuracy in operation is improved, the usage cost is reduced, meanwhile surgeons are not required to be trained specially, the prosthesis is simple and convenient to operate and install, a three-dimensional coordinate position of the prosthesis during installation is determined, the time for required calibration in operation is shortened, and operation efficiency is improved. The peripheral positioning of the acetabulum prosthesis is achieved and high-accuracy installation of the acetabulum prosthesis is ensured when the short eccentric handle is arranged on the acetabulum prosthesis and installed in the acetabulum.

The invention provides a fabrication template system for custom individual artificial total hip replacement operation acetabulum. The system comprises an acetabulum positioning guide plate, a depth control drill and a colored depth indication rod. The acetabulum positioning guide plate comprises a fossa ovalis positioning plate, an acetabulum bottom positioning plate and a depth guide cylinder. The fossa ovalis positioning plate is attached to the fossa ovalis according to the fossa ovalis dissection shape. The acetabulum bottom positioning plate is arranged at the outer edge of the fossa ovalis positioning plate and is attached to the acetabulum cartilage face according to the acetabulum dissection shape. The depth guide cylinder is arranged on the acetabulum bottom positioning plate and performs guide and depth limitation on the depth control drill. The depth control drill performs drill on the acetabulum through the depth guide cylinder, a depth limit ring protruding from the drill is arranged on the body portion of the depth control drill, and the depth limit ring is limited at the end of the depth guide cylinder through the depth guide cylinder. The length of the colored depth indication rod is identical to the drill hole depth, and the colored depth indication rod is inserted into the hole to indicate the depth and direction. By means of the template system, the ideal acetabulum prosthesis arranging position can be obtained, and accordingly, the acetabulum prosthesis can be arranged accurately, and the operation effect is improved.

An acetabular prosthetic device for implantation in an iliac canal and acetabulum of an ilium comprises a stem and an acetabular component. The stem may be configured to be implanted in the iliac canal. The acetabular component may be configured to be implanted in the acetabulum and fixed to the stem. The acetabular component may further comprise a connection portion to adjustably connect the acetabular component to the stem such that the acetabular component is configured to be oriented in a plurality of orientations before being fixed to the stem.

Direct anterior approach (DAA) with the patient lying supine has facilitated the use of intraoperative fluoroscopy and allows for standardized positioning of the patient. The method disclosed herein uses intraoperative fluoroscopy to measure acetabular component anteversion and more particularly, a method for measuring/calculating intraoperative cup (acetabular component) anteversion is provided based on the measured acetabular component abduction angle and a c-arm tilt angle (CaT).

The invention relates to an artificial hip joint with an aspherical acetabulum, comprising a non-spherical bearing curved-surface acetabulum prosthesis and a spherical femoral head prosthesis, wherein the non-spherical bearing curved-surface acetabulum prosthesis comprises an acetabulum external surface, an acetabulum cup opening plane is respectively connected with the acetabulum external surface and an acetabulum bearing curved surface, and the acetabulum bearing curved surface is an rotational ellipsoid curved surface obtained by rotating a long axis as a rotation axis by using a center line direction of left and right femoral heads as a long-axis direction and the up-and-down direction as a short-axis direction. When the two prostheses are in micro deviation in the walking process of a human body or the placement position of an acetabulum is improper during operation, the edge contact can be avoided; and compared with the traditional spherical joint, by adopting the artificial hip joint with the aspherical acetabulum, obtained by utilizing a finite element for calculation, contact stress can be reduced by 78.45% to the maximal degree, and although the contact stress is increased when micro separation is not generated, the increased range is not large. The artificial hip joint with the aspherical acetabulum reduces the contact stress, especially the contact stress of an external upper edge so that the abrasion of the external upper edge is further reduced so as to prolong the service life of the prostheses, and has the advantage of long service life.

The invention discloses an acetabulum prosthesis, which is used to replace bone tumor in an acetabulum, and comprises an inner liner (4) which is sleeved outside a ball head of a femoral head, an acetabulum cup (3) is sleeved outside the inner liner (4), the inner liner (4) can rotate between a ball head of a femoral stem and the acetabulum cup (3), and the size of an opening of the acetabulum cup (3) is adjusted to prevent the acetabulum prosthesis from dislocating. The acetabulum prosthesis can be combined with an acetabular bone which is arranged in a patient body, is more firm to fix, is large in activity angle range, and is prevented from dislocating. The acetabulum prosthesis can be assembled at random according to situations of different patients, and meets the demands of different patients. The acetabulum prosthesis can protect limbs for patients, meets the demands of different positions of osteotomy in acetabulum surgery of hip joints, is identified with an original acetabulum position of in a patient body and an angle physical line, and can effectively and reliably rebuild functions of bodies.

The invention relates to the technical field of medical instruments, in particular to an acetabulum prosthesis and an artificial hip joint. The acetabulum prosthesis comprises an acetabulum cup and alining. An acetabulum cup guiding segment, a stopping segment and a locking groove segment are sequentially connected to the inner surface of the acetabulum cup; a lining guiding segment, a deformation-allowable groove segment and a locking protrusion segment are sequentially connected to the outer surface of the lining; the lining and the acetabulum cup can be buckled so that the acetabulum cup guiding segment and the lining guiding segment can be matched, the stopping segment and the deformation-allowable groove segment can be matched, and the locking groove segment and the locking protrusion segment can be matched; the diameter of the locking protrusion segment is smaller than that of the locking groove segment, larger than that of the stopping segment, and smaller than or equal to thatof the acetabulum cup guiding segment. The artificial hip joint comprises the acetabulum prosthesis. The acetabulum prosthesis and the artificial hip joint aim to solve the technical problems that inthe prior art, during an operation, a lining easily deflects under beating, the hand feeling is unstable when the acetabulum prosthesis is beaten, and the protrusion of the lining can not completelybe aligned with the groove in the acetabulum cup.

The invention discloses a full acetabulum prosthesis, comprising a metal outer cup (1), a ceramic liner (2) and a ceramic ball head (3), wherein the metal outer cup (1) is arranged outside the ceramic liner (2) in a sleeving manner; the ceramic liner (2) is arranged outside the ceramic ball head (3) in a sleeving manner; the outside surface of the ceramic liner (2) is formed by the connection of multiple planes; an angle is formed between adjacent planes; the inner surface of the metal outer cup (1) is matched with the outer surface of the ceramic liner (2); the metal outer cup (1) can be connected with the ceramic liner (2); the inner surface of the ceramic liner (2) is of a ball shape; the outer surface of the ceramic ball head (3) is matched with the ball shape of the inner surface of the ceramic liner (2); the ceramic ball head and the ceramic liner are enabled to mutually rotate through a ceramic articular surface formed by the outer surface of the ceramic ball head and the inner surface of the ceramic liner. The full acetabulum prosthesis disclosed by the invention overcomes the existing defect of abrasion between an ultra high molecular weight polyethylene liner and the ball head, dislocation is not easy to occur, and prosthesis implantation is stable.

The invention discloses an acetabulum navigation guiding plate designed by 3D printing. The plate comprises a navigation guiding plate, a navigation angle device and a Kirschner wire, wherein the navigation guiding plate is designed according to CT three-dimensional data of a patient to form a navigation guiding plate which can be clamped on an acetabulum rim; and meanwhile, the navigation guidingplate is fixed on the acetabulum rim through the Kirschner wire; and the navigation angle device is matched with the navigation guiding plate and an acetabulum polishing file to guide and correct theacetabulum grinding angle and realize accurate grinding of the acetabulum. The acetabulum navigation guiding plate does not need to be removed in the acetabulum polishing process, and the acetabulumcan be polished more accurately and easily through the navigation angle device, so that the placement angle accuracy of an acetabulum prosthesis is more accurate than that of the traditional technology; and compared with the traditional template, the operation time and the bleeding amount are effectively reduced due to omitting relevant links such as hole punching of a fixed point of the acetabulum, axis positioning hole punching, removal of the template and the like.

The invention discloses an acetabular prosthesis positioning device and method for unilateral hip joint revision surgery. In the device, a positioning claw is detachably mounted on a holding rod, a lower end of the holding rod is connected with a connector through a cross universal shaft, the connector is detachably connected with an acetabular cup through a mounting head, a horizontal axis of thecross universal shaft is positioned on an adjusting plane of an anteversion angle of the acetabular cup, the connector is rotatably connected with a lower end of an adjusting rod on an extension lineof the horizontal axis, an upper end of the adjusting rod is provided with a first screw rod, the first screw rod penetrates through an angle adjusting plate and is in threaded connection with an anteversion angle fine adjustment knob, and the anteversion angle fine adjustment knob is in clearance fit with the angle adjusting plate through an I-shaped structure; the adjusting rod is assembled with a second screw rod through a connecting piece, the second screw rod extends out of the angle adjusting plate and is in threaded connection with an abduction angle fine adjustment knob, and the abduction angle fine adjustment knob is in clearance fit with the angle adjusting plate through an I-shaped structure. The device and method can accurately and stably position the acetabular prosthesis, accurately adjust the abduction angle and anteversion angle, and have high efficiency and low cost.

The invention provides an acetabulum prosthesis and an artificial hip joint, and relates to the field of medical apparatuses. The acetabulum prosthesis comprises a ceramic acetabulum main body, wherein a surgical mounting hole is formed in the ceramic acetabulum main body; the surgical mounting holes runs through the outer spherical surface of the ceramic acetabulum main body to the inner spherical surface of the ceramic acetabulum main body; and surgical assistant tools are arranged in the surgical mounting hole. The artificial hip joint comprises an artificial fossa acetabuli, a ceramic femoral head prosthesis and the acetabulum prosthesis; the inner spherical surface of the ceramic acetabulum main body makes into contact with the ceramic femoral head prosthesis; and the outer sphericalsurface of the ceramic acetabulum main body makes into contact with the artificial fossa acetabuli. According to the acetabulum prosthesis and the artificial hip joint provided by the invention, technical problems of the prior art that a structure of combining a metal acetabular cup to a ceramic lining can get broken easily and is relatively low in safety can be solved.

The invention relates to a hip-joint prosthesis upper-end structure capable of replacing a small tuberosity part. The hip-joint prosthesis upper-end structure comprises: a femoral stem, which is usedfor being connected with a femoral head, namely being connected with an acetabular cup and a femur, so the femur can rotate on the basis of the acetabular cup; a medullary needle connecting stem, which is used for being connected with a medullary needle inserted into the femur to connect the femur with an acetabular prosthesis; and a small tuberosity structure, wherein the upper part and the lowerpart of the small tuberosity structure are fixedly connected with the femoral stem and the medullary needle connecting stem respectively; the medullary needle connecting stem and the femoral stem arearranged at two sides of the small tuberosity structure respectively; the small tuberosity structure is in a polyhedron shape with the side wall being vertical or extending towards an upper middle position; and the bottom surface, located at one side of the parting position of the medullary needle connecting stem and the small tuberosity structure, of the small tuberosity structure is horizontal,so a planar end surface structure is formed. The hip-joint prosthesis upper-end structure provided by the invention has an anti-sinking effect.

The invention provides an acetabular prosthesis and a hip prosthesis, and relates to the technical field of medical instruments. The acetabular prosthesis comprises an acetabular cup, a lining main body and a fixing mechanism. As the acetabular cup and the lining main body are in threaded connection, the lining main body is screwed into the acetabular cup, and the acetabular cup and the lining main body are fixed by the fixing mechanism after the lining main body is screwed into the correct position so as to ensure that the fixing of the correct position of the lining main body and the acetabular cup. The acetabular prosthesis solves the technical problems in the prior art that: a lining cannot accurately enter an acetabular cup in an operation process, the position of the lining in the acetabular cup is not correct, the lining is easy to fall off from the lining after being used for a long time, the forced putting-into is easy to cause damage. The acetabular prosthesis realizes the technical effects that: the lining can accurately enter the acetabular cup, the connection between the lining and the acetabular cup is ensured to be firm, damage is not easily caused, and the service life is prolonged.

The invention provides an acetabulum prosthesis. An acetabular cup and a filling structure are arranged in the acetabulum prosthesis, and an articular surface is arranged in a groove of the acetabularcup; and the filling structure is arranged on the acetabular cup, the filling structure is located on the side, away from the articular surface, of the acetabular cup, at least one part of the filling structure is used for filling a defective acetabular fossa to support the acetabular cup, and at least one part of the filling structure is made of absorbable alloy. Due to the fact that the fillingstructure is connected with the acetabular cup, after implantation, the filling structure supports the acetabular cup, dislocation and slippage between the filling structure and the acetabular cup are avoided, and stability is high; and moreover, at least one part of the filling structure is made of the absorbable alloy so that the absorbable alloy can be gradually absorbed by a human body afterlong-term implantation and can be replaced by newly grown bones, thereby realizing bone reconstruction. Therefore, through the technical scheme, the effects of early-stage high-strength filling and supporting and middle-and-long-term bone reconstruction can be achieved.

The invention relates to a hip joint prosthesis and an acetabulum lining. The acetabulum lining comprises an acetabulum cup and at least two acetabulum linings, wherein the surface conicity of different acetabulum linings is different, each acetabulum lining is provided with an articular surface used for being matched with a femoral head, and the central positions of the articular surfaces of thedifferent acetabulum linings are different. The acetabulum cup is provided with a containing cavity used for containing any acetabulum lining, at least two partition areas with different conicity areformed on the cavity wall of the containing cavity, and the partition area with one conicity is matched with the acetabulum linings with the specific surface conicity. The acetabulum prosthesis has high universality and can be suitable for patients of different eccentric distances.

The invention provides an acetabulum prosthesis. The acetabulum prosthesis comprises an acetabulum cup (10) and a ball head (20). The ball head (20) is arranged in the acetabulum cup (10). A rolling friction mechanism (30) is arranged between the acetabulum cup (10) and the ball head (20) and comprises a plurality of balls (31) of different sizes. The diameters of the balls (31) are gradually decreased in the direction from a cup rim of the acetabulum cup (10) to the cup bottom. By means of the technical scheme, the problem that in the prior art, the joint interface is worn is solved effectively.

The invention provides an acetabular prosthesis which comprises an acetabular outer cup and a pressure sensor. The pressure sensor is arranged on the acetabular outer cup to detect pressure applied to the corresponding position of the acetabular outer cup. The acetabular prosthesis solves the problem that an acetabular prosthesis cannot monitor the stress state of a prosthesis in a human body in real time in the prior art.

The invention relates to the field of medical apparatus and instruments and discloses a total acetabulum prosthesis. The total acetabulum prosthesis comprises a metal outer cup in a half oblate spheroid shape and a lining which is arranged in the metal outer cup in a sleeving mode, grooves are formed in the inner periphery surface of the metal outer cup, elastic protrusions matched with the grooves are formed on the outer periphery surface of the lining, and the elastic protrusions on the lining can be embedded in the grooves under the effect of external force so that the lining can be prevented from moving relative to the metal outer cup. The total acetabulum prosthesis can be mounted more conveniently by an operation and implanted more stably, and a second revision surgery of total acetabulum prosthesis implantation can be effectively avoided.