21 results about "Prosthesis Loosenings" patented technology

The invention provides a knee joint prosthesis tibial plateau capable of enhancing fixation and a tool matched with the tibial plateau, the knee joint prosthesis tibial plateau specifically comprises a tibia support, the tibia support is of a hollow cylinder structure, and three convex bodies are fixedly arranged on the outer surface of the tibia support; a groove penetrating into the tibia support is formed in the abutment, and the abutment is fixedly arranged on the tibia support; the pushing device comprises extension rods arranged at the two ends of a worm, the worm with threads arranged on the outer surfaces of the two ends, turbines arranged on the two sides of the worm, upper supporting bodies arranged at the tops of the turbines and connected with the fixing device through first connecting bodies, and lower supporting bodies arranged at the bottoms of the turbines and connected with the fixing device. The fixing device is a hollow cone, a first spring is arranged in the fixing device, one end of the first spring is connected with the first connector, and the other end of the first spring is connected with a fixing block. According to the technical scheme, the technical problem that after the knee joint prosthesis is implanted into the tibia, the tibial plateau is unstable, the prosthesis is loosened and disengaged, and then bone fusion is affected is effectively solved.

The application provides a knee joint prosthesis tibial plateau capable of enhancing fixation and a matching tool, and specifically comprises: a tibial tray, which is a hollow cylindrical structure and is externally provided with three convex bodies; a base, which is provided with a groove penetrating into the tibial tray and is fixed on the tibial tray; a pushing device, which comprises: an extension rod arranged at both ends of a worm, a worm with threads arranged on the outer surface of both ends, a turbine arranged at both sides of the worm, an upper support body arranged on the top of the turbine and connected with a fixing device through a first connecting body, and a lower support body arranged at the bottom of the turbine and connected with the fixing device; and the fixing device is a hollow cone, which is internally provided with a first spring, one end of the first spring is connected with the first connecting body, and the other end is connected with a fixing block. The technical scheme of the application effectively solves the technical problem that after the knee joint prosthesis is implanted into the tibia, the tibial plateau is not stable, the prosthesis is loose and comes off, and bone fusion is affected.

The invention relates to the technical field of medical instruments, in particular to a hip joint thighbone prosthesis and a hip joint thighbone prosthesis manufacturing method. The hip joint femoral prosthesis comprises a spherical prosthesis main body and a connecting part, the spherical prosthesis main body is provided with an opening, one end of the connecting part extends into the spherical prosthesis main body and is connected with the spherical prosthesis main body, and the other end of the connecting part extends out of the opening; wherein the inner wall of the spherical prosthesis main body is provided with a functional gradient porous structure, and the porosity and the pore diameter of the functional gradient porous structure are gradually increased from the inner wall of the spherical prosthesis main body to the center direction of the spherical prosthesis main body in the preset direction. According to the hip joint thighbone prosthesis, the service life of a surface replacement type hip joint thighbone prosthesis can be prolonged, the problem that an existing biological fixation type prosthesis is loosened and loses efficacy due to stress shielding is solved, and the risk that a porous structure is prone to falling off from a base body in a long-term load environment is reduced.

The application discloses a prosthesis system for minimally invasive femoral head replacement, which comprises a bone cutting assembly, a prosthesis, an extension rod, a guide frame and a locking nail. In the operation, only a small opening is needed on the lateral side of the femoral neck, and then a channel is established, and the prosthesis is implanted in the channel, so that the degree of trauma, the operation time and the blood loss are greatly reduced. A detachable extension rod is arranged on the implanted prosthesis, and after the extension rod is positioned by cooperating with the guide frame, the extension rod can guide the path of the locking nail, so that the locking nail is connected with the prosthesis, and is fixed with the large and small trochanters of the patient, so that the prosthesis can be combined with the relatively hard bone and the surface layer of the femoral neck to achieve stable combined support and avoid loosening of the prosthesis.

An implantable electronic device (12) and an endoprosthesis activity monitoring system (10) with a knee prosthesis (11) are developed. Knee prosthesis (11) has at least two blind cavities (35.1, 35.2), one in a lateral aspect of a femoral component (11.1) or tibial component (11.2), within which devices (12) are removably mounted and remote device (18) in wireless communication with devices (12) to receive data transmitted from it. Devices (12) are configured to track movement of the prosthesis (11) and to report same to the remote device (18). Devices (12) are self-contained and include an accelerometer (13), memory (15), a wireless communication module (14), processor (17) and a battery (16). Activity information analysed allows for early diagnosis of implant specific problems like loosening of the prosthesis. Location of devices (12) in the lateral aspects improves accessibility. Devices can be removed by minor surgery without compromising structural integrity of the knee prosthesis.

The invention provides a hip joint surface replacement prosthesis suitable for severe acetabulum defects, and belongs to the technical field of medical instruments. The three-wing acetabulum outer cup prosthesis is made of metal cobalt-chromium-molybdenum materials, a titanium alloy coating and a hydroxyapatite coating are arranged on the surface of the three-wing acetabulum outer cup prosthesis, and the coatings are of a micropore structure. The upper wing, the middle wing and the lower wing are connected to the circumferential surface of the three-wing acetabulum outer cup prosthesis in a sliding mode; the upper wing, the middle wing and the lower wing of the hip joint surface replacement prosthesis are designed into shapes matched with a bone anatomical structure of a patient, so that the prosthesis can be tightly attached to an acetabulum area of the patient. According to the personalized adaptive design, necessary initial stability is immediately provided after an operation, a solid foundation is laid for early movement and recovery of a patient after the operation through a multi-point fixing mechanism, and the risk of complications caused by prosthesis looseness is reduced.

The invention provides an assembled radial head prosthesis, and belongs to the technical field of medical instruments. The invention provides an assembled radial head prosthesis which comprises a radial head, a radial handle and a plurality of sets of filling parts, a joint nest is formed in the upper end of the radial head, and a mounting groove is formed in the lower end of the radial head; a mounting head is arranged at the upper end of the radial handle and is arranged in the mounting groove; the multiple sets of filling parts are sequentially arranged in a stacked mode and all arranged on the outer side of the radial handle in a sleeving mode, the inner side walls of the filling parts are matched with the outer side wall of the radial handle in shape, and the filling part at the lowermost end is located above the osteotomy bone surface of the radius of the patient. According to the assembled radial head prosthesis, the number of the filling pieces is selected according to the actual situation, the filling pieces are arranged between the radial head and the osteotomy bone surface of a patient, the osteotomy bone surface is supported, the position of the radial head is limited, the stability of the prosthesis after implantation is improved, and the risks that the prosthesis is loosened and fractures occur around the prosthesis are reduced.

The present invention relates to the technical field of orthopedic artificial joints, and in particular, to a metal total knee artificial joint and a method for preparing a metal total knee artificial joint. The metal total knee artificial joint comprises a femoral condyle prosthesis and a tibial plateau prosthesis. Both the femoral condyle prosthesis and the tibial plateau prosthesis are made of 3D printing of zirconium-niobium alloy. The two can be slidably matched, and the sliding contact surface of the femoral condyle prosthesis and the tibial plateau prosthesis is provided with a metal-ceramic interface; the integration interface of the femoral condyle prosthesis and the tibial plateau prosthesis with the external bone body is a 3D-printed trabecular integration interface. The metal total knee artificial joint eliminates the tibial plateau pad prosthesis, and through the metal-ceramic interface, it can reduce the amount of osteotomy of the tibial plateau and optimize the wear of the friction interface, thereby avoiding the risk of osteolysis caused by debris generated by wear, which in turn causes the prosthesis to loosen. It can also improve the bone integration efficiency of the interface between the prosthesis and the bone tissue, which is beneficial to the stability of the prosthesis in the later stage of implantation.

The present application relates to the technical field of orthopedic artificial joint design and manufacturing, in particular to an intervertebral disc prosthesis and a preparation method thereof. The first plate body of the intervertebral disc prosthesis is provided with a semispherical groove on the side away from the first fixing seat; the second plate body is provided with a connecting slot on the side away from the second fixing seat; the nucleus pulposus prosthesis comprises a semispherical convex surface and a base, the semispherical convex surface is movably connected with the semispherical groove, and the base is connected with the connecting slot; the surfaces of the first plate body and the second plate body are both provided with gradient trabeculae, and the surfaces of the semispherical groove and the semispherical convex surface in contact with each other are both metal ceramic interfaces formed by zirconium-niobium surface oxidation. The upper end plate of the intervertebral disc prosthesis can keep relative movement with the nucleus pulposus prosthesis, and the contact friction interface of the relative movement is a metal ceramic interface formed by zirconium-niobium surface oxidation, so that the friction surface can reduce abrasion to the greatest extent, the wear resistance of the prosthesis is improved, the service life of the prosthesis is prolonged, the loosening of the prosthesis is improved, the metal allergic reaction and metal artifacts are reduced.

The present invention relates to a pad for tibial bone defects, which belongs to the field of bone implantation technology. The pad comprises a main body that is pressed into the bone defect area on the inner posterior side of the tibial plateau, one side of the main body is an arcuate surface, the main body is fixedly connected to the tibial tray, the main body is a porous structure, the porosity of the main body along the length direction of the tibia increases gradually from the tibial tray to the bone bed, and the porosity of the main body along the radial direction of the tibia increases gradually from the cortical bone to the medullary cavity; the present invention utilizes the arcuate surface on the main body to match the morphology of the bone defect on the inner posterior side of the tibial plateau, so as to avoid cutting off too much normal bone, the porosity of the main body with a porous structure increases gradually from the proximal end to the distal end of the tibia along the length direction of the tibia, and the porosity along the radial direction of the tibia increases gradually from the bone cortex to the medullary cavity, the pad fits the elastic modulus of the surrounding bone tissue, effectively reduces stress shielding, can effectively support the tibial tray, and avoids various complications such as prosthesis loosening and displacement after surgery.

The invention discloses a bone defect hip joint prosthesis which comprises a semi-crescent acetabulum edge filling block set, a bone metal defect block, an acetabulum wall defect supporting block, a cylinder supporting block, an angle cushion block, a locking nail, a locking nut, an assembling screw, an acetabulum plugging nail and an acetabulum supporting block. The semi-crescent acetabulum edge filling block group comprises two groups of semi-crescent acetabulum edge filling blocks, the two groups of semi-crescent acetabulum edge filling blocks are assembled through matching of pin holes and pins, and the outer circle of the bone metal defect block of the acetabulum supporting block is connected with the semi-crescent acetabulum edge filling block group through bone cement. According to the bone defect hip joint prosthesis, the irregular defect area of the acetabular edge is effectively filled up, the screw hole positions and the kirschner wire hole positions of various specifications are formed in the surface of the bone defect hip joint prosthesis to provide multi-dimensional fixing selection, the overall structure achieves precise reconstruction under the premise that the biomechanical property is guaranteed through the synergistic effect of multiple components, and the bone defect hip joint prosthesis is high in practicability. And the postoperative prosthesis loosening and wearing risks are obviously reduced.

An implantable electronic device (12) and an endoprosthesis activity monitoring system (10) with a knee prosthesis (11) are developed. Knee prosthesis (11) has at least two blind cavities (35.1, 35.2), one in a lateral aspect of a femoral component (11.1) or tibial component (11.2), within which devices (12) are removably mounted and remote device (18) in wireless communication with devices (12) to receive data transmitted from it. Devices (12) are configured to track movement of the prosthesis (11) and to report same to the remote device (18). Devices (12) are self-contained and include an accelerometer (13), memory (15), a wireless communication module (14), processor (17) and a battery (16). Activity information analysed allows for early diagnosis of implant specific problems like loosening of the prosthesis. Location of devices (12) in the lateral aspects improves accessibility. Devices can be removed by minor surgery without compromising structural integrity of the knee prosthesis.

The invention provides a partitioned porous structure ankle joint tibia prosthesis, and relates to the technical field of artificial joint prostheses, the partitioned porous structure ankle joint tibia prosthesis comprises a tibia prosthesis, the upper end face of the tibia prosthesis is of a porous structure, and the lower end face of the tibia prosthesis is of a porous structure. And the pore diameter of the porous structure of the first outer area is different from that of the porous structure of the first inner area. The upper end face of the tibia prosthesis of the ankle joint tibia prosthesis with the partitioned porous structure is provided with the porous structure, the porous structure is divided into the first outer area and the first inner area, the first outer area and the first inner area are different in aperture, and then the first outer area and the first inner area can be matched with a bone trabecula structure at the far end of a tibia in a regional non-uniform distribution characteristic; a porous structure partition of a first outer area and a porous structure partition of a first inner area are arranged on an osseointegration interface in a targeted mode, and therefore bone resorption and secondary prosthesis looseness caused by postoperative stress shielding are reduced.

The invention provides a hip joint thighbone prosthesis, and relates to the technical field of artificial joint prostheses, the hip joint thighbone prosthesis comprises a thighbone prosthesis main body, a plurality of anti-rotation keels are arranged on the inner surface of a spherical joint part, the plurality of anti-rotation keels are arranged along the circumferential direction of a connecting part, and the spherical joint part is connected with the thighbone prosthesis main body. The multiple anti-rotation keels divide the inner surface of the spherical joint part into multiple outer areas, and the pore diameters of the porous structures of the adjacent outer areas are different. According to the hip joint femoral prosthesis provided by the invention, the plurality of anti-rotation keels are arranged on the inner surface of the spherical joint part of the femoral prosthesis main body, and the anti-rotation keels can effectively improve the anti-rotation effect of the hip joint femoral prosthesis; the anti-rotation keel enables the inner surface to form a plurality of outer areas, and the pore diameters of the porous structures of the adjacent outer areas are different, that is, each outer area corresponds to different bone density areas of the femoral head, so that the problem of prosthesis looseness caused by biomechanical mismatching of the prosthesis and the host bone is solved.

The application discloses a knee joint prosthesis system and a preparation method, wherein the femoral condyle prosthesis, the tibial plateau pad prosthesis, the tibial plateau prosthesis and the patellar prosthesis are made of zirconium niobium alloy, so that the sliding friction contact surfaces of the tibial plateau pad prosthesis, the patellar prosthesis and the femoral condyle prosthesis are metal ceramic interfaces formed by oxidation of zirconium niobium surfaces, the wear rate is lower, the active wear of the joint prosthesis can be effectively reduced, the service life of the joint prosthesis is prolonged and the failure rate is reduced, meanwhile, the risk of osteolysis caused by debris generated by wear of a traditional prosthesis due to an ultra-high molecular weight polyethylene tibial plateau pad prosthesis, and further triggering the risk of loosening of the prosthesis, can be avoided. Moreover, the bone integration interfaces of the femoral condyle prosthesis, the tibial plateau prosthesis and the patellar prosthesis are zirconium niobium alloy trabecular structures, so that the zirconium niobium alloy trabecular structures have excellent biocompatibility, are convenient to combine with the bone tissue of a patient and can improve the bone integration efficiency of the frame body and the bone tissue.

The utility model discloses a knee joint replacement assembly type tibia base prosthesis, and belongs to the technical field of medical instruments. The defects that in the prior art, a traditional tibia base prosthesis is loosened, and movement of a knee joint is limited are overcome. The main structure of the tibia support assembly comprises a tibia support assembly central base, a near-end locking screw, a far-end locking screw and a tibia support assembly clamping groove matched with the tibia support assembly central base, the tibia support assembly central base is provided with a central inner hole thread and a positioning hole, and the tibia support assembly clamping groove is provided with a central hole and an inner hole thread. The near-end locking screw penetrates through the central hole and then is in threaded connection with a central inner hole thread in the central base of the tibia support assembly, and the far-end locking screw penetrates through the positioning hole and then is in threaded connection with an inner hole thread in the clamping groove of the tibia support assembly. The artificial total knee joint replacement device is mainly used for artificial total knee joint replacement.

The invention provides a screw assembly and an acetabular cup prosthesis assembly.The screw assembly comprises a screw, an injection channel is formed in a screw body, and a through hole is formed in the side wall of the screw body; an insertion hole communicated with the injection channel is formed in the screw head, and a guide groove, an annular groove and a clamping groove are formed in the hole wall of the insertion hole; the guide groove extends in the axis direction of the screw body, and the first end of the guide groove penetrates through the surface of the screw head. The annular groove communicates with the second end of the guide groove, the clamping groove communicates with the annular groove, and the guide groove and the clamping groove are staggered in the circumferential direction of the annular groove; the first end of the conveying pipe can be matched with the inserting hole in an inserted mode, a clamping protrusion is arranged on the outer side wall of the first end of the conveying pipe, the clamping protrusion can be matched with the guide groove and the annular groove in a guiding mode, and the clamping protrusion can be matched with the clamping groove in a clamped mode. According to the technical scheme, the problem that in the prior art, connection between a bone screw and an autogenous bone is not reliable, and prosthesis looseness is likely to be caused is solved.

This application relates to the field of orthopedic artificial joint design and manufacturing technology, and in particular to a metal-ceramic reverse-type shoulder joint prosthesis system and its preparation method. The metal-ceramic reverse-type shoulder joint prosthesis system includes a humeral stem prosthesis, a humeral support prosthesis, a reverse-type glenoid head prosthesis, a taper adapter prosthesis, and a glenoid support prosthesis connected sequentially. The sliding contact surface of the humeral support prosthesis is adapted to the contact surface of the reverse-type glenoid head prosthesis, and both the humeral support prosthesis and the reverse-type glenoid head prosthesis are manufactured using 3D-printed zirconium-niobium alloy. A metal-ceramic interface layer formed by the oxidation of zirconium-niobium surfaces is provided between the humeral stem prosthesis and the humeral support prosthesis, between the humeral support prosthesis and the reverse-type glenoid head prosthesis, between the reverse-type glenoid head prosthesis and the taper adapter prosthesis, and between the taper adapter prosthesis and the glenoid support prosthesis. This application offers advantages such as longer service life, high wear resistance, low wear rate, no osteolysis, and no prosthesis loosening.

This application relates to the field of orthopedic artificial joint design and manufacturing technology, and in particular to a metal-ceramic total shoulder joint prosthesis system and its preparation method. The metal-ceramic total shoulder joint prosthesis system includes a humeral stem prosthesis, a tapered adapter prosthesis, a humeral head prosthesis, and a glenoid fossa prosthesis connected sequentially. The humeral head prosthesis and the tapered adapter prosthesis are both formed using 3D zirconium-niobium metal printing or forging. The humeral stem prosthesis and the glenoid fossa prosthesis are integrally formed using 3D printed zirconium-niobium alloy. A metal-ceramic interface layer formed by the oxidation of the zirconium-niobium surface is provided at the relative motion contact surface of the humeral head prosthesis and the glenoid fossa prosthesis. The metal-ceramic total shoulder joint prosthesis system provided by this application has advantages such as longer service life, high wear resistance, low wear rate, no osteolysis, and no prosthesis loosening.

The present application relates to a kind of knee joint prosthesis and its manufacturing method, wherein the knee joint prosthesis includes tibial platform prosthesis, tibial platform prosthesis has osteotomy fitting area;Osteotomy fitting area includes integration area, anchoring area and transition zone;Integration area is positionally corresponding with host cancellous bone area, for inducing bone tissue growth to realize long-term biological fixation;Anchoring area is positionally corresponding with host sclerotic bone area or cortical bone area, realizes immediate fixation by mechanical interlocking;Transition zone is located between integration area and anchoring area, and the porosity of transition zone gradually decreases along the direction of integration area to anchoring area, and structural rigidity gradually increases along the direction of integration area to anchoring area, its beneficial effect is, the active adaptation of prosthesis and host bone bed non-uniform biological characteristics is realized, immediate mechanical stability and long-term biological integration effect are obtained under the premise of not needing permanent screw auxiliary fixation, the risk of prosthesis loosening is reduced, and the clinical service life of prosthesis is effectively prolonged.

This invention provides a combined hip joint revision filler structure, comprising: an iliac wing assembly, which includes an acetabular cup support and an iliac wing fixation portion integrally formed on the acetabular cup support; the outer side of the acetabular cup support is used to fit and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation portion is used to fit and fix to the patient's iliac wing; and a filler block, which is fixed to the iliac wing assembly and includes a fusion surface for fitting the patient's hip defect bone from below and a contact surface for fitting the inner side of the acetabular cup support. This invention improves the stability of the fixation structure by fitting and fixing the inner side of the iliac wing fixation portion to the patient's iliac wing, and also improves the convenience of subsequent positioning and screw placement. Simultaneously, the filler block also meets the need to fill hip defect bone, solving the problems of difficult positioning and screw placement of existing pre-made metal acetabular pads, and the inability to fill bone defects, which easily leads to acetabular prosthesis loosening.