60 results about "Spinal cage" patented technology

The invention relates to a self-generating interbody fusion cage and a preparation method thereof, the interbody fusion cage comprises a porous tantalum support and bioactive piezoelectric ceramic arranged on the porous tantalum support, and the bioactive piezoelectric ceramic comprises hydroxyapatite and barium titanate; the preparation method comprises the following steps that the porous tantalum support is obtained through 3D printing, assembling positions of the bioactive piezoelectric ceramics are reserved on the upper surface and the lower surface of the porous tantalum support, the bioactive piezoelectric ceramics are embedded into the assembling positions of the upper surface and the lower surface of the porous tantalum support, and the weight ratio of barium titanate to hydroxyapatite is (92-98): (2-8). Compared with the prior art, the vertebral fusion cage has the advantages of promoting vertebral fusion by utilizing mechanical force in a human body to generate electricity, matching mechanical properties of a contact surface of the fusion cage, providing osteogenesis related ions, being relatively good in interface combination and the like.

The invention provides an interbody fusion cage. The interbody fusion cage comprises an upper vertebral plate, a lower vertebral plate and a shell, the driving device comprises a driving rod, and a bevel gear pair is arranged on one side of the driving rod; the transmission bevel gear is meshed with the bevel gear pair; the top of the supporting rod is provided with a first spherical hinge, the first spherical hinge is embedded into the spherical seat of the upper vertebral plate, the outer surface of the supporting rod is provided with a transmission thread, and the bottom of the supporting rod is provided with a second spherical hinge; the sleeve is arranged on the outer surface of the supporting rod in a sleeving mode, and the top of the flexible base abuts against the second spherical hinge. According to the technical scheme, the stress shielding effect in the implanting process of the interbody fusion cage can be effectively achieved, and the technical problem that the interbody fusion cage is attached to the physiological curvature can be effectively solved.

The invention provides an interbody fusion cage and a manufacturing method of the interbody fusion cage. The interbody fusion cage comprises a first end plate assembly, a second end plate assembly and an elastic supporting assembly. The two ends of the elastic supporting assembly are connected with the first end plate assembly and the second end plate assembly respectively. The first end plate assembly comprises an end plate body, a tooth retreating prevention structure and a porous structure, the end face of one end of the end plate body is connected with the elastic supporting assembly, and the end face of the other end of the end plate body is a bearing contact face used for abutting against vertebra tissue; the tooth retreating prevention structure and the porous structure are respectively arranged on the bearing contact surface; the tooth retreating prevention structure protrudes out of the bearing contact surface and is used for being fixedly connected with vertebra tissue; hollowed-out holes are formed in the porous structure and used for allowing a part of growing vertebra tissue to extend into the porous structure. The interbody fusion cage solves the problems that in the prior art, due to the fact that the contact area between an interbody fusion cage and vertebrae is small, postoperative prostheses are prone to disengagement or looseness, end plate sclerotin is damaged, and the fusion efficiency is poor.

The invention discloses a design method of a structural mechanical gradient regulation and control interbody fusion cage for end plate defects. The design method comprises the following steps of data acquisition and model construction; analyzing the shape of the defective end plate; carrying out interface mechanical adaptation design on the defect end plate and the structural gradient fusion cage; performing multi-objective optimization; the invention relates to a 3D printing defect endplate mechanical and biological adaptive spinal fusion cage. The individual end plate defect model can be established according to the difference of different patients, the local elastic modulus of the fusion cage is dynamically adjusted through morphological analysis and typing, the stress conduction height matching with the defect end plate is realized, the settlement risk is reduced, and the fusion effect is improved; by combining the biological adaptation design of the end plate, the pore structure and material characteristics of the fusion cage are optimized, and bone healing is promoted; through the scheme of image analysis, digital design, intelligent optimization and precise manufacturing, a mechanical and biological dual-adaptive fusion cage system solution is provided for a patient with the defect of the end plate.

The invention relates to the technical field of medical instruments, and particularly discloses an interbody fusion cage and a preparation method thereof.The preparation method comprises the following steps that S1, a mold matched with the interbody fusion cage in shape is prepared, and a porous aluminum filling body is prepared; s2, the two ends of the mold are filled with porous aluminum material filling bodies, and cavities are formed between the mold and the porous aluminum material filling bodies at the two ends; s3, the mold is filled with PEEK in an injection molding mode, and the cavity and pores of the porous aluminum material filling body are filled with the PEEK; and S4, after the PEEK is cured, removing the mold, and dissolving the porous aluminum filling body by adopting a pickling mode, so that porous PEEK is formed at the two ends of the interbody fusion cage. The porous PEEK structure is prepared in an injection molding mode, and the problem that the technical difficulty is large due to the fact that the porous PEEK structure is prepared in a 3D printing mode is solved.

A system and method for spinal fusion that can include: a spinal cage body that includes at least one defined graft window cavity; a plurality of electrodes exposed on the surface of the spinal cage body; control circuitry configured to drive the plurality of electrodes in a stimulation mode; wherein there is at least a targeted osteoinduction region and a targeted non-osteoinduction region that are immediately adjacent to the spinal cage body; and wherein the control circuitry includes configuration to excite the plurality of electrodes during the stimulation mode for generation of a current density in the targeted osteoinduction region and targeted non-osteoinduction region according to targeted levels of bone growth.

The utility model provides an anti-receding expansion type interbody fusion cage, and relates to the technical field of medical equipment. The interbody fusion cage comprises a tube body and a pull rod. The pull rod comprises a rod body and a limiting block, and the rod body is inserted into the pipe body from one side. A limiting groove is formed in the inner side wall of the tube body, a baffle ring is arranged in the limiting groove, a clamping groove is formed in the rod body, and when the interbody fusion cage is opened, the baffle ring is arranged on the rod body in a sleeving mode and clamped into the clamping groove. According to the anti-receding expansion type interbody fusion cage, the invalid size of the cage after the cage is opened can be reduced, work is reliable, and the rebound risk is reduced.

The invention relates to the technical field of medical instruments, in particular to an interbody fusion cage which comprises an interbody fusion cage body, the interbody fusion cage body is of a polyhedral structure and is implanted into the lumbar intervertebral space through an anterior lateral approach, and a screw channel and a connecting screw opening are formed in the front end position and the rear end position in the length direction of the interbody fusion cage body respectively; the screw channel is used for allowing screws to penetrate through the upper surface and the lower surface of the interbody fusion cage body, connected with the vertebral cancellous bone in a matched mode and fixed to the inner side of the lateral portion of the vertebral cancellous bone. The connecting screw is used for being connected with an installation instrument in a matched mode when the interbody fusion cage is implanted. By means of the screw channel, the fixing capacity of the interbody fusion cage can be effectively improved, better stability can be effectively provided for an OLIF operation through a proper implantation position and screw placement internal fixing operation, the occurrence risk of postoperative internal fixing related complications is effectively reduced, and the safety of the interbody fusion cage is improved. The effectiveness and the safety of the fusion cage in the lumbar vertebra front and outer side approach interbody fusion operation are improved.

Machine learning and intelligent planning techniques are disclosed for fabricating spinal fusion plates and spinal cages that can be utilized as a system together to provide a precision guided anterior cervical discectomy and fusion (ACDF) surgery to a subject in need thereof. The spinal fusion plate provides adjustments of one or more vertebrae even after attaching the plate to the spine of the subject. The spinal fusion plate provides a surgical window or "postbox" for accessing the intervertebral space(s) of the subject, provides the postbox window for precision insertion of a spinal cage, provides a locking inset to prevent over-insertion of the spinal cage, and provides precision compression of the spinal cage after the insertion. Methods of treating subjects in need of a discectomy surgery are described herein utilizing the precision implants.

The invention relates to the technical field of orthopedic implants, in particular to a 3D printed interbody fusion cage. According to the distraction device, the front end distraction module and the rear end distraction module are arranged, the rear end distraction module is rotationally connected with the upper distraction body and the lower distraction body through the multiple rotating pieces correspondingly, the movement stroke of a first rotating shaft rotationally connected with the rotating pieces is limited through a first limiting sliding groove formed in a linkage piece, and therefore the rear end distraction angle is limited; according to the front end opening module, the movement stroke of a sliding piece on a front end moving piece in the axial direction and the height direction is limited through a second limiting sliding groove obliquely formed in a lower opening body, and therefore linkage adjustment of the angle and the height can be achieved at the same time when the front end is opened; when the first pushing rod and the second pushing rod are driven at the same time, the sliding piece and the second limiting sliding groove are matched, the rotating piece and the rotating shaft are matched, the first limiting sliding groove is matched, and the fourth rotating shaft and the third limiting sliding groove are matched to achieve synchronous opening of the front end and the rear end of the opening body.

The invention relates to an interbody fusion cage and a preparation method thereof, and relates to the field of orthopedic implantation, the interbody fusion cage comprises a vertically placed cylindrical fusion cage main body and a pore structure fixedly connected in an inner hole of the fusion cage main body, and the pore structure is in a lattice net shape. The interbody fusion cage provided by the invention has a bone induction function, so that a good bone fusion effect can be achieved without bone grafting or with a small amount of bone grafting.

Disclosed is a spinal cage fixable through insertion of bone screws including a cage body, a receiver disposed on a front surface of the cage body and provided with a plurality of screw holes formed therein so that the bone screws pass through the screw holes to be inserted thereinto, and a fixture coupled to the receiver adjacent to the screw holes and configured to selectively block a portion of each screw hole, wherein, when each bone screw enters a corresponding screw hole, a front end of the fixture is moved in an outward direction of the corresponding screw hole, and when insertion of each bone screw into the corresponding screw hole has been completed, the front end of the fixture is moved in an inward direction of the corresponding screw hole to prevent each bone screw from being separated from the corresponding screw hole.

The invention provides a lumbar vertebra oblique lateral self-locking integrated fusion internal fixation system which comprises an interbody fusion cage, the interbody fusion cage is of a torpedo-shaped streamline structure on the whole and is of an arc-shaped appearance with the middle protruding and the two sides low, the front portion of the interbody fusion cage is high, the rear portion of the interbody fusion cage is low, the side section of the interbody fusion cage is wedge-shaped, and the interbody fusion cage is matched with an intervertebral space structure. A pair of diagonal trusses is fixedly connected in the hollow cavity; the micro side plate is arranged on one side of the interbody fusion cage, the micro side plate and the interbody fusion cage are of a 3D printing integrated structure, a threaded hole and clamping grooves in the two sides are formed in the middle of the micro side plate, and four inclined threaded holes are formed in the four corners of the micro side plate respectively; the number of the fixing screws is four, the fixing screws are connected into the inclined threaded holes through threads respectively, and the four fixing screws are in a multi-axial-direction crossed angulation form. According to the low-incisura, integrated and self-locking novel oblique lateral fusion internal fixation system, internal fixation related complications can be reduced, the operation process in an operation is simplified, the screw placement safety is ensured, and the use experience of the fusion system is improved.

The utility model discloses a cervical vertebra anterior approach interbody 3D printing porous metal integrated fusion device which comprises a fixator and a cervical vertebra interbody fusion cage, the inner side of the fixator is attached to an axis body and connected with the cervical vertebra body through a fixing insertion piece, and the cervical vertebra interbody fusion cage is connected with the inner side of the fixator. In the anterior cervical intervertebral disc resection fusion internal fixation, integration of bone fusion and internal fixation is achieved, so that the success rate of vertebral fusion is increased, the surgical bleeding amount and damage to muscular tissue are reduced, the surgical time is shortened, and a cervical vertebra complex can be safely and effectively fixed and fused.

The utility model discloses the spinal interbody fusion cage of adjustable elastic modulus relates to the orthopedics equipment field, including roof and bottom plate, the roof corresponds with bottom plate, the bottom plate upside fixedly connected with installation component, the roof is installed with a plurality of high elastic modulus pad and low elastic modulus pad through installation component between bottom plate, the installation component includes the locating plate of vertical fixed connection in the bottom plate upside, is established in a plurality of vertical locating slot on the locating plate. Advantageous effects lie in: through the quantity of adjusting high elastic modulus pad and low elastic modulus pad can adjust the elastic modulus of this fusion ware, increase the quantity of high elastic modulus pad, reduce the quantity of low elastic modulus pad, can increase the elastic modulus of this fusion ware, if reduce the quantity of high elastic modulus pad, increase the quantity of low elastic modulus pad, can reduce the elastic modulus of this fusion ware, make this fusion ware can satisfy different patient demand.

The application discloses a degradable spinal fusion cage with a bone inductive microporous structure and belongs to the technical field of orthopedic implant medical devices. The fusion cage is integrally made of a degradable polymer composite material, the inside of the main body is provided with a bionic gradient microporous structure which is interconnected, and the surface of the fusion cage is provided with an active coating layer with a slow-release function. The mechanical property of the product is adapted to the physiological bearing requirement of the spine, the product can be steadily degraded along with the bone tissue regeneration process after being implanted into the human body, can effectively guide the bone tissue and microvessels to grow in, and can improve the intervertebral fusion efficiency; meanwhile, the problems of stress shielding, postoperative infection and the need for secondary removal surgery existing in traditional metal implants are solved, the product has good biocompatibility, the structure is reasonable, the preparation process is simple, and the product is suitable for clinical intervertebral fusion surgery of the spine.

The objective of the present invention is to provide an interbody fusion cage device which: has bone fusion protrusions and bone fusion holes on an upper plate and a lower plate of a cage that is to be inserted between vertebrae, and has a grid-shaped elasticity providing body, formed over both side plates and a rear plate, for adjusting an elastic modulus of the cage to an elastic modulus of a bone such that bone fusion between the vertebrae and the cage is facilitated and subsidence in which the cage penetrates the vertebrae can be prevented; has diagonal screw insertion holes, formed on a front plate of the cage, to be structured such that the insertion direction of fixing screws can be vertically and horizontally adjusted and thus a margin for the direction in which the fixing screw is inserted into the vertebrae from the outside of the cage can be provided, thereby enabling convenience and accuracy of surgery for an operator to be improved; and has a screw fastening hole formed on the front plate of the cage such that a separation prevention screw for preventing the separation of the fixing screw can fastened thereto, and thus the loosening or separation of the fixing screw insertively fastened to the vertebrae from the cage can be prevented.

The utility model discloses a kind of guiding formula arc intervertebral fusion cage sets, it includes: shaft sleeve, intervertebral fusion cage and guide needle, the shaft sleeve includes: first blocking part and second blocking part, the intervertebral fusion cage is housed in the shaft sleeve, the intervertebral fusion cage is configured to rotate radially from the shaft sleeve, the guide needle is configured to pass through the intervertebral fusion cage to guide the intervertebral fusion cage to target position, when carrying out spinal interbody fusion cage fusion, intervertebral fusion cage can be guided to the vertebral body opening of target, is implanted with the rotation to comply with the arc of vertebral body, to avoid injury surrounding nerve root or soft tissue, and reduce the opening area required for operation, reach the requirement of wound range minimization.

An implant for interbody fusion of vertebrae comprising a unibody cage structure having an enveloping cage volume and a minimized material volume. The cage structure comprises a first and a second generally planar ring member, each ring member formed from an opposing pair of lengthwise joists and an opposing pair of cross joists, the joists together forming a large opening through the ring member. The ring members are fixedly sandwiched on a plurality of support members, the support members holding the ring members in a spaced apart relationship to thereby provide a large void volume relative to the enveloping cage volume, to thereby allow for receipt of a large volume of bone graft within the cage structure.

The invention relates to a modular anchoring adaptor that engages with existing features of commercially available ALIF cages to help eliminate migration and / or anterior expulsion cause by the instability of the spine, such as lordosis. Such modular adaptor will mate or engage with existing features to enhance anchoring within the vertebral disc space, which space is limited and a low-profile should be maintained.

The invention provides a D-shaped hollow cylindrical thoracolumbar vertebra side wall interbody fusion cage for a rachitis operation, which belongs to the technical field of medical instruments for spine surgery, is an integrally formed rigid structure without movable parts, is a D-shaped hollow cylindrical body on the whole, and comprises a fusion cage cylindrical body with a fixed height, the cross section of a main body is D-shaped, and the cross section of the main body is L-shaped; the upper end face and the lower end face of an arc-shaped side wall and a plane side wall are enclosed by the upper end face and the lower end face; the cylindrical hollow cavity penetrates through the fusion cage cylindrical body in the axial direction, and the micron-sized rough textures are arranged on the outer surfaces of the arc-shaped side wall and the plane side wall. Anatomical matching with the lateral bone surface of the vertebral body is achieved through the D-shaped section, and load transmission and stress distribution are fundamentally improved in combination with large-area contact between the planar side wall and the end plate. Unprecedented initial stability is provided for the fusion cage in infectious loose bone, and the risks of displacement, sedimentation and disengagement are remarkably reduced.

The utility model discloses a gear distraction self-stabilization interbody fusion cage for lumbar vertebra lateral road, relates to medical instrument technical field, the interbody fusion cage comprises a fusion cage main body and a mounting rod, the outer surface of the fusion cage main body is connected with a negative Poisson's ratio layer, and one side of the outer surface of the fusion cage main body and one side of the outer surface of the negative Poisson's ratio layer are respectively provided with a through hole. Through the arrangement of the negative Poisson's ratio layer, the racks, the slots, the through holes, the operating rod, the gears, the puncture head and the barbs, the operating rod is firstly sleeved on the mounting rod, and then the mounting rod is mounted in the slots and tightened, so that the mounting rod is connected with the fusion cage main body, and at the moment, the gears enter the slots to correspond to the two groups of racks; then the fusion cage main body is put into the body of a patient to be in contact with the lumbar vertebra, then the gear is rotated by rotating the operating rod, the gear is meshed with the two racks after rotating, the two racks extend out of the through holes, and therefore the two puncture heads and the barbs enter the lumbar vertebra of the patient, and the structure is prevented from retreating and falling off; operation is convenient, connection is stable, and the fusion effect is good.

The invention discloses a slidable and self-locking type atlantoaxial interbody fusion cage, and belongs to the technical field of atlantoaxial interbody fusion cages, the slidable and self-locking type atlantoaxial interbody fusion cage is provided with a fusion cage upper slip sheet convenient to support, a fusion cage lower slip sheet is attached to the lower surface of the fusion cage upper slip sheet, and angle plates are mounted on the outer sides of the fusion cage upper slip sheet and the fusion cage lower slip sheet; comprising a sliding strip which slides in a sliding groove formed in a sliding piece on the fusion cage. According to the slidable and self-locking type atlantoaxial interbody fusion cage, the fusion cage upper sliding piece and the fusion cage lower sliding piece are arranged, the sliding stability between the fusion cage upper sliding piece and the fusion cage lower sliding piece is improved through the use of a sliding strip, a first moving block and a second moving block, and a first clamping piece and a second clamping piece are matched for use, so that the adjusted and assembled fusion cage body is adjusted and locked; and surgical assembly locking is achieved, the stability of adjusting and locking of the fusion cage is improved, falling and adjusting dislocation are prevented, and replacement and assembly can be conveniently conducted according to the requirements of a patient through a replacement plate.

An interbody spinal cage when implanted can be manipulated non-invasively to change dimensions conforming to contours of adjacent vertebral bones. The interbody spinal cage includes a flexible shell that encases multiple variable-length rods. Each of the multiple variable-length rods include telescoping tubes and an actuator for increasing and decreasing the length of the telescoping tubes. Each of the variable-length rods includes a retention member to limit movements of the telescoping tubes, wherein the retention member can be engaged and disengaged. Both the retention member and the actuator can be operated from outside the body in which the interbody spinal cage is implanted.

Provided is a height-adjustable interbody fusion cage for an oblique lateral approach, comprising a body having a frame structure. A first upper blade is movably disposed on one end surface of the body, and a second lower blade is movably disposed on the end surface of the body opposite to the first upper blade. Opposite side surfaces of the body are provided with positioning holes. The two positioning holes are located on the same straight line in the horizontal direction, and the center lines of the two positioning holes are also on the same straight line. The end surface of the body adjacent to the positioning holes is a threaded end surface, and the threaded end surface is provided with a threaded hole. The surfaces of the first upper blade and the second lower blade are both arranged obliquely to the horizontal line, and the surfaces of the first upper blade and the second lower blade are both disposed at an acute angle to the horizontal line. The fusion cage has a height adjustment function, and can be accurately adjusted after implantation, thereby providing greater surgical operation flexibility and ensuring an optimal implantation position and fusion effect.

The present invention belongs to the technical field of medical implant prostheses, specifically a cervical anterior intervertebral fusion device, comprising a fixing plate and a fusion device body, the fixing plate being mounted on the fusion device body, the area enclosed between the fusion device body and the fixing plate being a bone grafting cavity, and screws being mounted on the fixing plate; a fusion groove being provided on the fusion device body, and a shaped blocking net being mounted at the opening of the fusion groove; an injection hole being provided on the fixing plate, an adjusting rod being mounted in the injection hole, a movable plate being mounted on the adjusting rod, the movable plate being located in the bone grafting cavity, a fixing block being mounted in the injection hole, the fixing block being rotatably connected to the adjusting rod, and the adjusting rod being threadedly connected to the movable plate; the present invention has a simple structure, can increase the contact area and contact effect between the vertebral body edge and the fusion device, avoids increasing the size of the fusion device, facilitates the implantation of the fusion device during cervical spine surgery, and improves the fusion effect and fusion speed.

This invention provides a spinal fusion device, belonging to the technical field of spinal fusion devices, comprising: support blocks, with a support space formed between two support blocks; a first force-bearing structure located in the support space, the first force-bearing structure including a first force-bearing member, the two support blocks being connected through the first force-bearing member; and a second force-bearing structure including two second force-bearing members, both of which are located in the support space and respectively connected to the two support blocks. This invention employs a dual-stage force-bearing structure design. In the initial compression stage, only the first force-bearing member provides elastic support, and the relatively small elastic modulus provides a certain amount of strain, promoting osseointegration. When the compression displacement increases to the point where the second force-bearing members contact, the dual structures work together to bear the load, significantly improving the overall compressive strength and stability. The three-period minimal curved surface has an extremely high specific surface area, which is conducive to cell attachment, proliferation, and differentiation, and the zero average curvature avoids stress concentration.

One or more techniques and / or systems are disclosed for an expandable spinal cage device used in a spinal fusion procedure. The device can comprise three major pieces that are combined to expand the device both laterally and vertically in the intervertebral gap. A first piece is a cage support body, and a second piece is a width expander body inserted into the first piece that laterally expands the first piece. A third piece is a vertical expander body inserted into the first or second piece that results in vertical expansion of first piece. In this way, the first piece can be expanded laterally up to two times, and vertically up to two times.

One or more techniques and / or systems are disclosed for an expandable spinal cage device used in a spinal fusion procedure. The device can comprise three major pieces that are combined to expand the device both laterally and vertically in the intervertebral gap. A first piece is a cage support body, and a second piece is a width expander body inserted into the first piece that laterally expands the first piece. A third piece is a vertical expander body inserted into the first or second piece that results in vertical expansion of first piece. In this way, the first piece can be expanded laterally up to two times, and vertically up to two times.

The invention relates to the clinical field of orthopedics, and discloses an expandable lumbar vertebra lateral interbody fusion cage and a gradient expansion mechanism thereof.The expandable lumbar vertebra lateral interbody fusion cage comprises a first fusion cage expansion block and a second fusion cage expansion block, the expansion mechanism is arranged on the outer side of the first fusion cage expansion block and the outer side of the second fusion cage expansion block, and the expansion mechanism comprises a first movable block and a second movable block; threaded sleeves are fixedly connected to the interiors of the first movable block and the second movable block, two-way lead screws are connected to the interiors of the two threaded sleeves in a threaded mode, and notch grooves are formed in the ends, close to the second movable block, of the two-way lead screws. The fusion cage adopts an expansion mode that two-way lead screws drive movable blocks to get close to each other and is matched with multiple limiting structures of sliding blocks and sliding grooves and wing strips and limiting strips, the stable and accurate expansion process is ensured, the intervertebral space can be effectively expanded to recover the normal height, reliable mechanical limiting is formed, pressure and twisting force generated by spine movement are resisted, and retraction of the fusion cage is prevented; the long-term stable maintenance of the expansion state is ensured.