193 results about "Interbody cage" patented technology

The invention belongs to the technical field of medical implant prostheses, and particularly relates to a self-stability cervical interbody fusion cage which comprises a fixing plate and a fusion cage body. An adjusting rod is mounted in the fusion cage main body, a mounting groove is formed in the fusion cage main body, the adjusting rod and a sliding block are mounted in the mounting groove, a check block is mounted on the adjusting rod, and the check block drives the sliding block to move; an adjusting groove is formed in the fusion cage body, a connecting plate and a protruding tooth rod are installed in the adjusting groove, a contact plate is installed on the connecting plate, and a top block and a sliding block are connected through a pull rope; when the interbody fusion cage is implanted, the protruding toothed rod retracts, the surface of the protruding toothed rod is kept flat and smooth, implantation of the interbody fusion cage is facilitated, extrusion, friction and scratching are avoided, then after implantation, the protruding toothed rod stretches out, friction force between the interbody fusion cage and the vertebral body end plate is increased, and it is guaranteed that the fixing effect and stability of the interbody fusion cage are good; the treatment effect is improved.

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 embodiments provide various interbody fusion spacers, or cages, for insertion between adjacent vertebrae. The cages may have integrated ratchet assemblies that allow the cage to change size and angle as needed, with little effort. The cages may have a first, insertion configuration characterized by a reduced size to facilitate insertion through a narrow access passage and into the intervertebral space. The cages may be inserted in a first, reduced size and then expanded to a second, larger size once implanted. In their second configuration, the cages are able to maintain the proper disc height and stabilize the spine by restoring sagittal balance and alignment. Additionally, the intervertebral cages are configured to be able to adjust the angle of lordosis, and can accommodate larger lordotic angles in their second, expanded configuration. Further, these cages may promote fusion to further enhance spine stability by immobilizing the adjacent vertebral bodies.

An expandable interbody with a modular endplate has an outer column, an inner column threadedly coupled and translatable relative to the outer column along the longitudinal axis, and an expansion ring to adjust a body length of the expandable interbody. The expansion ring has a plurality of teeth, and the outer column has at least one arm for engaging a tooth of the plurality of teeth to lock the expansion ring. The inner column and / or outer column can include a connector for connection to a modular endplate that has a substantially hollow core. The modular endplate includes a plate with a set screw entrapped therein. The modular endplate has an aperture to receive the connector of the inner and / or outer column.

A variety of expandable cage improvements are provided. The cages can have a width expansion assembly that operates independently of a height expansion assembly and the wedges and ramps do not need to make contact with each other. Wedges, or movable spacers with pivotal link connections, can be used, and any portion of the cage can be expanded in width or in height in an amount that differs from other portions of the cage to provide any of a multitude of desired cage shapes. Interdigitating fingers, slidable and / or pivoting, are provided to distribute stresses over a vertebral endplate as desired.

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.

Systems and methods for providing an interbody implant are disclosed. According to some implementations, the implant includes an implant body having a cranial face and a caudal face disposed opposite the cranial face. In some implementations, the implant includes one or more primary fixation mechanisms, which in turn can include one or more anchor cavities defined by the implant body. In some cases, one or more anchors are configured to be housed at least partially within the anchor cavities in an undeployed position, and the anchors are configured to be translationally deployed to a deployed position in order to couple the implant to a bony endplate of a spinal vertebra. In some implementations, the implant includes one or more actuators configured to effectuate selective deployment of the anchors.

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.

Provided herein are an anchor and interbody for interbody fusion, including an interbody for insertion between human vertebrae, including an interbody cage including a plurality of anchor receptacles, each anchor receptacle configured to receive an anchor to secure the interbody to a vertebra; and the anchor, including a head configured to engage an anchor receptacle; a curved partial-tubular shank with a convex curve, connected to or integral with the head at a distal end of the head, and extending from the head; a tapered tip portion extending from a distal end of the curved partial-tubular shank; one or more rails integral with or connected to an outside surface of the anchor, extending from a proximal end of head and along the curved partial-tubular shank to a proximal end of the tapered tip portion; and a feature formed from two flat surfaces on an outside of the anchor and a rail.

The invention discloses a lumbar interbody fusion cage and an implementation method thereof.The lumbar interbody fusion cage comprises a base body, the base body comprises an upper end plate and a lower end plate, and the surface curvature of the upper end plate and the surface curvature of the lower end plate are matched with the lumbar interbody curvature of the human body; the porous coatings comprise a single coating and a multi-coating, the porous coatings cover the outer surfaces of the upper end plate and the lower end plate, the porous coatings are made of biological materials, the multi-coating is composed of a plurality of different biological material layers, and each layer of the multi-coating has different porosity and biocompatibility; the supporting structure comprises a flexible hinge, a through hole is formed in the inner side of the base body, the through hole penetrates through the left side and the right side of the base body, and the flexible hinge is matched with the through hole to enable the base body to be bent to a certain extent when the base body is subjected to external force. According to the lumbar interbody fusion cage, through optimization design, the biomechanical suitability, the biocompatibility and the bone healing effect are remarkably improved.

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.

A guide head and a holding head are arranged at the front end and the rear end of an upper supporting plate and the front end and the rear end of a lower supporting plate respectively, the guide head and the holding head are both in a wedge shape, and the two wedge faces of the guide head and the holding head are in sliding contact fit with the inclined faces of the upper supporting plate and the lower supporting plate respectively. The guiding head and the holding head are driven to be separated and gathered through a thread transmission structure, a nut piece of the thread transmission structure and the guiding head are arranged in a rotation-stopping and movement-stopping mode, a screw piece is matched with the holding head in a rotation-stopping and movement-stopping mode, and the end of a bolt piece is provided with an exposed screwing structure. And a gap which is communicated with the hollow accommodating cavity after the guide head and the holding head are gathered to open the upper supporting plate and the lower supporting plate is formed between the upper supporting plate and the lower supporting plate. An outer frame is not needed, the size is small, lifting can be conducted after implantation, the gap communicated with the hollow containing cavity is formed, the bone can be implanted from the side face after the height is increased, and healing of a diseased part is facilitated.

This invention relates to an intervertebral fusion cage for insertion between vertebrae. The cage has a body defining a first, anterior portion, a second, posterior portion and a central portion extending between the anterior and posterior portions. The central portion may define a first surface which is, in use, a top surface and a second surface which is, in use, a bottom surface. The top and bottom surfaces may carry gripping formation for gripping end plates of the vertebrae. The gripping formations on the top and bottom surfaces preferably face substantially opposite directions such that the gripping formations on the top surface obstruct movement in first direction while the gripping formations on the bottom surface obstruct movement in a second direction, which is substantially opposite the first direction.

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.

Interbody spacers are expandable horizontally and vertically by an application of axial force, and lockable in an expanded configuration. The spacers include support members interconnected to end bodies by pivotable link members. The spacers are introduced between vertebral bodies in a compressed configuration and expanded to fill the intervertebral space and provide support and selective lordotic correction. Graft material may be introduced into the expanded spacer. Provisional and / or supplementary locking means lock the spacers in the expanded configuration. Embodiments of the spacers include symmetrically and asymmetrically configured spacers. Methods of expansion include symmetric expansion or asymmetric expansion along each of two directions.

The invention provides an angle-adjustable interbody fusion cage and an operation assembly thereof. The angle-adjustable interbody fusion cage comprises an upper supporting plate, a lower supporting plate, a shell and an adjusting mechanism. The upper supporting plate and the lower supporting plate are located on the upper surface and the lower surface of the shell respectively. The head ends of the upper supporting plate and the lower supporting plate are connected with the head end of the shell through a first movable part, and the tail ends of the upper supporting plate and the lower supporting plate are connected with the tail end of the shell through a second movable part. The first movable part is driven by the adjusting mechanism to drive the head end of the upper supporting plate and the head end of the lower supporting plate to be opened and / or closed through displacement. The second movable part is driven by the adjusting mechanism to drive the tail end of the upper supporting plate and the tail end of the lower supporting plate to be opened and / or closed through displacement. The interbody fusion cage is exquisite in structure and adjustable in angle, independent control over opening and closing of the upper supporting plate and the lower supporting plate can be achieved, different interbody anatomical structures of a patient are met, and convenience is provided for medical staff in the real-time operation process.

A multi-level vertebral implant comprising a biocompatible cage disposed between a first and a second endplate configured to maximize subsidence and bone contact with adjacent vertebrae is disclosed. In some embodiments, the multi-level vertebral implant comprises a first and a second endplate having plurality of anti-migration features on the bone contacting surfaces of the endplates. In various embodiments, the endplates may be configured to prevent radial and axial rotations of biocompatible cage. In various embodiments, each endplates further comprise and anterior plate that is configured to provide anchoring of the multi-level vertebral implant to ventral surfaces of the adjacent vertebrae to prevent migration of the multi-level vertebral implant in an installed state.

The invention discloses a 3D printing bone grafting window-free porous tantalum metal interbody fusion cage which comprises a fusion cage body, the fusion cage body is integrally formed by machining medical-grade tantalum metal, and a clamping hole is formed in the front side of the fusion cage body and used for being connected with an operation instrument; the two groups of porous net racks are respectively fixed on the upper surface and the lower surface of the fusion cage body, the outer side surface of each porous net rack is a contact interface, and each contact interface is of an arc-shaped structure; bayonets are symmetrically formed in the inner wall of the front side of the fusion cage body, the clamping hole is formed between the bayonets, and the bayonets are used for limiting operation instruments. The porous tantalum material with high biological activity and high porosity is adopted, reliable spinal fusion can be achieved on the premise that bone grafting is not needed, the problems of bone taking trauma and donor region complications related to bone grafting and immunoreaction caused by allogeneic bone grafting are effectively solved, and therefore the occurrence risk of postoperative complications is reduced, and the bone grafting success rate is increased. The postoperative recovery process of the patient is improved.

The invention provides an endoscopic interbody fusion cage and an adjusting method thereof. The endoscopic interbody fusion cage is characterized in that a plurality of first screw holes are formed in a first vertebral plate; the lifting column comprises a plurality of lifting groups, threads are arranged on the outer surface of the lifting column, and the lifting column is rotatably connected with a first screw hole in the first vertebral plate through the threads; the driving device is a cylinder with threads on the surface; the transmission device comprises a plurality of gear sets with different diameters and tooth numbers, the gear sets are meshed with one another, threaded holes are formed in the centers of gears in the gear sets in a penetrating mode, and the transmission device is connected with the driving device in a meshed mode. One end of the steering device is fixedly arranged at the top of the lifting column; a third screw hole is formed in the second vertebral plate, and the other end of the steering device is fixedly connected with the second vertebral plate through a lead screw. According to the technical scheme, the technical problem that when left-right asymmetric angles exist between the upper vertebral plate and the lower vertebral plate, a traditional symmetric fusion cage cannot achieve mechanical load balanced transmission is effectively solved.

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.

[Solution] An expandable intervertebral spacer system has upper and lower plates forming a cage. The top, bottom, and sides of the cage have openings for receiving bone graft material. At least one angled section extends from the upper or lower plate into the cage. The upper and lower plates are connected to each other by a hinge at the proximal end of the cage. The cage is expanded by inserting a push rod from the proximal end of the cage against the angled section, forcing the upper and lower plates apart at a desired angle. A locking mechanism at the distal end of the cage uses a ratcheting mechanism to secure the plates apart. In this ratcheting mechanism, a torsion spring biases a movable strut against a fixed strut, which cooperates with sawtooth engagement on the movable and fixed struts to secure the upper and lower plates apart.

The invention discloses a spine intervertebral fusion implant positioning structure, which relates to the technical field of intervertebral fusion cage, and comprises a fusion cage upper moving part and a fusion cage lower moving part, which are mutually clamped, bone grafting holes for implanting bone blocks are formed in the fusion cage upper movable part and the fusion cage lower movable part in a penetrating manner; through the arrangement of the fusion cage upper moving part, the fusion cage lower moving part and the expandable connecting rods, stable support is formed between adjacent vertebral bodies, the correct height between the vertebral bodies is maintained, meanwhile, through the arrangement of the connecting rods, the connecting rods and the push rods, the situation that the interbody fusion cage is deformed in the process of bearing pressure between the adjacent vertebral bodies in the use process is avoided, and the use safety of the interbody fusion cage is improved. And through the arrangement of the helical tooth blocks and the clamping blocks, the fusion cage is prevented from being deformed due to the fact that the adjacent intervertebral pressure is too large in the using process.

A two-stage intervertebral implant comprises an expandable cage comprising a pivot connecting upper and lower bodies, a first expansion mechanism, such as a wedge, configured to pivot the upper body and the lower body at the pivot point in a first stage, and a second expansion mechanism, such as a toggle joint, configured to pivot the upper body and the lower body at the pivot point in a second stage beyond the first stage. A method of implanting an implant comprises inserting the implant into anatomy, the implant comprising a first component rotatably coupled to a second component at a pivot point, operating a first expansion mechanism to rotate the implant at the pivot point to expand the implant to a first level, and operating a second expansion mechanism to rotate the implant at the pivot point from the first level to a second level.

The invention discloses an expansion type interbody fusion cage applied to a minimally invasive spine surgery, and relates to the technical field of medical instruments, the expansion type interbody fusion cage applied to the minimally invasive spine surgery comprises a fixing frame, an adjustable clamping assembly is rotatably arranged on the inner wall of the fixing frame and used for supporting and fixing the intervertebral space of a patient, and the clamping assembly is used for clamping the intervertebral space of the patient; the stability of the vertebral body is improved; adjusting assemblies capable of sliding are arranged at the two ends of the fixing frame and used for adjusting the height of the clamping assemblies so that the clamping assemblies can be matched with the vertebral gap of the patient. According to the expansion type interbody fusion cage applied to the minimally invasive spine surgery, the rotating frame, the fixing column and the conical nails are matched with one another, the two conical nails are used for adjustment, the interbody fusion cage can be matched with a vertebral body gap of a patient, and therefore the practicability and flexibility of the interbody fusion cage are greatly improved.

The application discloses a risk prediction method for subsidence of an intervertebral fusion cage after lumbar interbody fusion, and comprises the following steps: acquiring preoperative image data and postoperative image data within one week after operation of a target patient, wherein the preoperative image data and the postoperative image data comprise multiple image features reflecting local anatomical morphology, sagittal balance and bone conditions of the spine; inputting the multiple image features into a pre-trained subsidence risk prediction model to obtain a risk probability of the target patient suffering from the subsidence of the intervertebral fusion cage; wherein the subsidence risk prediction model is obtained by screening a core prediction feature set through a "funnel type" feature screening process of fusing preoperative native anatomical parameters and postoperative early image parameters, and by training the core prediction feature set by using a machine learning algorithm based on a historical patient data set containing subsidence samples and non-subsidence samples; and the application reduces the occurrence of postoperative complications.

An interbody cage for the spinal column structured as a scaffold made of at least two folding and unfolding scaffoldings: one base member (also named a cage body) which receives the pivoting means of a pivoting member (also named an extension member), and one extension member, structured to pivot around an axis on the cage body from a first folded or stowed configuration to a second unfolded or deployed configuration such that the perimeters of the contact surfaces between the interbody cage and the vertebrae and / or the height of the interbody cage increase from the stowed configuration to the deployed configuration.

A biomimetic intervertebral fusion device with a piezoelectric multifunctional coating belongs to the field of implantable medical devices. It includes an upper piezoelectric multifunctional coating, a fusion device body, and a lower piezoelectric multifunctional coating. A bone graft window is located in the middle of the biomimetic intervertebral fusion device. The piezoelectric multifunctional coating is made of electrospun piezoelectric PVDF / HA fibers, which are conformally adhered to the upper and lower surfaces of the fusion device body through a polydopamine adhesive layer. The upper and lower surfaces of the fusion device body have a biomimetic curved surface configuration to match the morphology of the vertebral endplates, increasing the contact area and reducing stress concentration at the fusion interface. While maintaining an elastic modulus similar to natural bone and good radiation permeability, this fusion device, after implantation, can create a microenvironment conducive to cell adhesion and proliferation. Under the influence of cell traction, ultrasonic stimulation, and the physiological load of the human lumbar spine, it generates electrical stimulation signals, promoting bone fusion, improving the stability of the fusion interface, and reducing the risk of postoperative loosening and subsidence of the fusion device.

This invention belongs to the field of medical devices and discloses an adjustable interbody fusion device, comprising a shell, a first support member, a second support member, and a built-in drive mechanism. The two support members are respectively located on the upper and lower surfaces of the shell. The drive mechanism uses coaxially arranged first and second threaded members, which respectively drive the first and second pushing members to move in opposite directions, thereby opening the head and tail ends of the two support members to achieve parallel opening of the support members. This invention replaces the traditional hinge drive with a threaded member drive, allowing the two threaded members to work independently without interference, simplifying the drive structure of the fusion device head and increasing the overall structural strength.

This invention discloses an angle-expandable intervertebral fusion device, comprising: a first support plate for supporting a first part of the vertebral body; a second support plate for supporting a second part of the vertebral body; a proximal wedge located between the first and second support plates, with the proximal ends of the first and second support plates respectively rotatably connected to the proximal wedge; a distal wedge located between the first and second support plates, slidably connected to the first and second support plates; and a drive mechanism, the distal end of which is located within the distal wedge, and the proximal end of which is rotatably connected to the proximal wedge. The fusion device of this invention has a very small initial volume, allowing for easy implantation into the diseased intervertebral space, reducing damage to the vertebral structure and soft tissues, and eliminating the need for excessive expansion of adjacent vertebral height. After implantation into the intervertebral space, the distal end of the drive fusion device is gradually expanded until the patient's lumbar spine conforms to the physiological curve of the human body.

The present invention relates to an intervertebral fusion device, which includes a shaft body, a first distraction member and a fusion body. The first distraction member is mounted on the shaft body and can move axially along the shaft body. The first distraction member has an inner end and an outer end distributed radially along the shaft body, and the inner end is connected to the shaft body. The fusion body is circumferentially arranged around the shaft body and connected to the outer end of the first distraction member. A first slide is provided on the inner wall of the fusion body. An angle is provided between the extension direction of the first slide and the outer wall of the fusion body. The outer end of the first distraction member is movably arranged in the first slide. In the above-mentioned intervertebral fusion device, the first distraction member can change the distance between the fusion body and the shaft body by sliding along the first slide, thereby changing the size of the distraction of the intervertebral fusion device. When the intervertebral fusion device is implanted, the distraction range of the intervertebral fusion device can be adjusted according to the specific conditions of the intervertebral space, and the contact surface with the vertebral space can be increased to better match the intervertebral space, maintain the height of the intervertebral space, and restore the physiological curvature of the lumbar spine.