279 results about "Intervertebral fusion" 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 provides an interbody fusion prosthesis and an interbody fusion prosthesis component, the interbody fusion prosthesis comprises an interbody fusion main body, the interbody fusion main body is provided with a bone grafting cavity, and the bone grafting cavity penetrates through the surface of the interbody fusion main body to form a first opening in the interbody fusion main body; and the first end plate is movably arranged at the first opening, and the first end plate is provided with a first avoiding position for avoiding the first opening and a first shielding position for covering the first opening. According to the technical scheme, the problem that in the related technology, the bone filling material in the bone grafting cavity has the falling risk is effectively solved.

A device for performing intervertebral body fusion between at a vertebral joint, and associated systems and methods for manufacturing the device are disclosed herein. In some embodiments, the device includes an expandable main body configured to be locked in a desired configuration between a superior and an inferior vertebrae at the vertebral joint to facilitate the intervertebral body fusion at the vertebral joint. A first endplate is connected to the main body. The first endplate can include a superior surface having one or more patient-specific features configured to engage and mate with an inferior surface of the superior vertebra. A second endplate is connected to the main body. The second endplate can include an inferior surface having one or more patient-specific features configured to engage and mate with a superior surface of the inferior vertebra.

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.

Expandable fusion devices, systems, instruments, and methods thereof. The expandable fusion device is capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. The fusion device may include a body, a first endplate, and a second endplate. A drive screw may be rotated to move the first and second endplates outwardly and into an expanded configuration. Instruments may be provided to ensure the implant is inserted safely and as intended.

An interbody spinal implant / fusion cage and implant inserter system for facilitating interbody fusion in the lumbar spine using bone graft while reducing the number of passes made through the patient's disc space and the sensitive surrounding tissue by integrating bone graft delivery into the inserter system. The system combines insertion of the interbody implant with bone graft delivery directly into the disc space. The system includes the interbody implant, an interbody cover plate, an implant inserter assembly, a cover plate inserter, a bone graft plunger and a bone graft funnel. The inserter assembly includes a large rectangular cannula which attaches to a large rectangular posterior opening in the interbody implant instead of a round cannula. The rectangular cannula approximates the shape of the annulotomy and provides a larger cross-sectional area for passage of a much larger quantity of bone graft material without jamming. Related methods and kits are also disclosed.

The invention provides a deep learning-based spine interbody fusion detection method, apparatus and device, and a computer readable storage medium. The method comprises the following steps: acquiring spine medical image data; preprocessing the medical image data to generate standardized input image data; inputting the preprocessed input image data into a pre-trained deep learning model, and analyzing local and global structural features of a vertebral body and an intervertebral space by the deep learning model through multi-layer convolution, pooling and activation function operation; based on an output result of the deep learning model, classifying fusion states of the vertebral body and the intervertebral space, and identifying whether fusion occurs or not; scoring the fusion degree of different intervertebral spaces to generate a fusion evaluation report; and visually displaying the detection result. According to the embodiment of the invention, spine interbody fusion detection can be more accurately carried out.

A kit of parts from which selection is made to form an intervertebral fusion device. The kit of parts comprises a plurality of different endplates and a core component. Each of the plurality of different endplates is configured to be received in an intervertebral space defined between first and second vertebrae. The core component is configured to engage with each of the plurality of endplates and a selected one of the plurality of endplates when the selected endplate and the core component are received in the intervertebral space. Each of the plurality of endplates defines a bone graft aperture which is open at top and bottom surfaces of the endplate and extends between the top and bottom surfaces, the thus defined bone graft apertures being of substantially the same dimensions as one another when the plurality of endplates are in plan view. The core component defines a bone graft material holding space having a holding space opening in one of a core component top surface and a core component bottom surface of the core component. The holding space opening is of substantially the same dimensions as each of the bone graft apertures when the core component is in plan view. The holding space opening is substantially coextensive with the bone graft aperture of the selected endplate in plan view and when the core component is engaged with and in registration with the selected endplate.

The invention relates to a preparation method and medical application of a porous tantalum material based on an extremely small curved surface structure. The porous tantalum material is particularly applied to medical implants such as an interbody fusion cage, an artificial vertebral body, a hip joint acetabular cup, a joint filling block and a dental implant. The material is pure tantalum or tantalum-containing alloy (such as tantalum-titanium, tantalum-niobium, tantalum-zirconium, tantalum-titanium-niobium-zirconium, and the tantalum content is greater than 1%), the material is constructed by adopting an additive manufacturing technology, the porosity is 30-90%, compared with a truss pore channel structure (such as a rhombic dodecahedron), no obvious stress concentration point exists, the strength, the modulus, the anti-fatigue performance and the like are remarkably improved, and the application prospect is wide. The method is particularly suitable for structural and functional reconstruction of large-area and load-bearing bone defects.

The invention discloses an angle-adjustable or deployable multi-stage anchoring insertion sheet system, and relates to the technical field of medical instruments, the angle-adjustable or deployable multi-stage anchoring insertion sheet system comprises a hollow box body, and the upper surface and the lower surface of the box body are each provided with at least one insertion sheet outlet; the at least one group of inserting piece driving mechanism is arranged in the box body and is used for generating linear driving force; the at least two insertion sheet assemblies are accommodated in the box body in an initial state, and each insertion sheet assembly is in driving connection with the insertion sheet driving mechanism; according to the intervertebral fusion cage, the secondary anchoring part capable of moving relative to the basic anchoring part is arranged, so that the anchoring angle or the opening degree of the fusion cage can be adjusted according to a vertebral form operation of a patient after the fusion cage is implanted, the adaptability to different anatomic forms is improved, and a more flexible anchoring scheme is provided for an intervertebral fusion operation.

The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In one embodiment, the fusion device includes a central ramp, a first endplate, and a second endplate, the central ramp capable of being moved in a first direction to move the first and second endplates outwardly and into an expanded configuration. The fusion device is capable of being deployed down an endoscopic tube.

The invention relates to a percutaneous implantation elastic modulus intervertebral dilator and an operation kit, and belongs to the technical field of spine surgery implants. In order to solve the problems that an existing intervertebral dilator causes a large wound to a patient and the distraction angle cannot be adjusted, the intervertebral dilator is provided with a dilator body, an angle auxiliary adjusting mechanism, an auxiliary suite and an angle feedback mechanism, the dilator body is used for being placed in the intervertebral space of the patient, and the angle auxiliary adjusting mechanism is arranged in the dilator body; the auxiliary suite comprises a first installation tool and a second installation tool, the first installation tool is arranged at the rear end of the spreader body and connected with the angle auxiliary adjusting mechanism, after the spreader body is placed, the first installation tool is taken down, and the spreader body is locked and fixed through the second installation tool; the angle feedback mechanism is arranged on the spreader body and extends to be connected with the first mounting tool, and an operator observes the spreading angle through the angle feedback mechanism. The operation steps are greatly reduced, and the operation efficiency and the intervertebral fusion effect can be improved.

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.

A multi-portal method for treating a subject's spine includes using a marking guide to align spinal incisions. The marking guide can include alignment features, such as radiopaque structures or elements that align with features such as anatomical elements, planes, implants, and / or the like. The marking guide can fit multiple access instruments, such as expandable scalpels, depth guides, surgical instruments, and / or the like. A user can position the access instrument relative to a feature using an alignment feature of the marking guide. The access instruments can be used to create incision sites and prepare entrances for multiple cannulas, cannulas and surgical instruments, multiple surgical instruments, and / or the like. One or more access instruments can be used to enlarge a working space between the entrances for delivery of an interbody fusion implant. The patient's spine can be visualized using endoscopic techniques to view the working space throughout the surgical procedure.

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.

Expandable intervertebral fusion implants, system, and methods. The expandable intervertebral implant is capable of being installed inside an intervertebral disc space to maintain disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. The implant may include a central drive assembly configured to control left and right side assemblies. The expandable intervertebral implant may be configured to transition from a collapsed configuration having a first width and a first height to an expanded configuration having a second width and a second height.

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.

An intervertebral fusion device comprises an endplate, a core component and at least one ratchet. Each of the endplate and the core component has a leading end and a trailing end and is configured to be received in an intervertebral space defined between first and second vertebrae. The ratchet comprises a pawl and a linear rack defining plural recesses. The pawl is comprised in the core component or the endplate and the linear rack is comprised in the other of the core component and the endplate. The core component and the endplate are configured to engage with each other by disposing the leading end of the core component adjacent the trailing end of the endplate and then moving the core component relative to the endplate in a direction of insertion such that the leading end of the core component moves towards the leading end of the endplate and extent of overlap of the core component and the endplate increases. The plural recesses of the linear rack extend in the direction of insertion and from near or at one of the leading end and the trailing end of the other of the core component and the endplate towards the other of the leading end and the trailing end of the other of the core component and the endplate. The plural recesses extends by no more than 60% of a distance between the leading end and the trailing end. The ratchet is configured such that the pawl starts to inter-engage with the plural recesses of the linear rack as the core component is moved further relative to the endplate in the direction of insertion and such that the pawl progresses along the plural recesses with further movement of the core component until the core component and the endplate have a desired extent of overlap.

The present invention relates to an intervertebral fusion device. The intervertebral fusion device comprises at least one endplate configured to be received in an intervertebral space defined between first and second vertebrae and a core component configured to engage with the at least one endplate when the at least one endplate is in the intervertebral space and the core component is inserted into the intervertebral space. The intervertebral fusion device also comprises first and second fingers and first and second recesses. A proximal end of each of the first and second fingers is attached to the endplate at or adjacent an anterior end of the endplate that first receives the core component when the core component is inserted into the intervertebral space. Each of the first and second fingers extends in the direction of insertion of the core component towards a posterior end of the endplate and is unattached along its length except at its proximal end whereby the finger flexes along its length. The first and second fingers are spaced apart from each other in a transverse direction which is orthogonal to a direction of insertion of the core component and to a direction of separation of the first and second vertebrae. The first finger defines a first protrusion at a distal end thereof and the second finger defines a second protrusion at a distal end thereof, each protrusion protruding from the respective finger in the transverse direction. The core component defines the first and second recesses near a posterior end of the core component, the first and second recesses spaced apart from each other in the transverse direction. The core component bears against the first and second protrusions during a first stage of insertion to flex the first and second fingers in the transverse direction, and during a second stage of insertion after the first stage of insertion the first and second protrusions are received in the first and second recesses respectively and under spring bias exerted by the first and second fingers to thereby retain the core component relative to the endplate.

The present invention relates to a method for determining the disc incision depth of posterior lumbar interbody fusion, comprising the following steps: (1) Selecting patients with lumbar degenerative diseases who have undergone X-ray examination and plain CT scan of lumbar intervertebral discs as samples; (2) Removing unqualified samples; (3) Taking anteroposterior and lateral X-rays of the lumbar spine with the patient standing, and performing tomographic scanning with the patient lying flat; (4) Measuring the lengths of the lower edges of the L3 (the third lumbar vertebra), L4 (the fourth lumbar vertebra), and L5 (the fifth lumbar vertebra) vertebral bodies in the X-ray films as the X-ray depths of the L3 / 4, L4 / 5, and L5 / S1 intervertebral spaces; (5) Performing statistical analysis using SPSS 18.0 software and making a table of the analysis results; (6) Obtaining the warning value of the disc incision depth based on the data results. This method provides the warning value of the insertion depth of the nucleus pulposus forceps for medical staff performing posterior lumbar interbody fusion, improving the safety and success rate of interbody fusion.

The invention provides an interbody fusion cage implanting system, and belongs to the technical field of medical instruments. The interbody fusion cage implanting system comprises a fusion cage body, a fusion cage implanting holder and a fusion cage extractor, a bone grafting groove is formed in the fusion cage body, the bone grafting groove is formed between the upper end face and the lower end face of the fusion cage body, and an opening of the bone grafting groove faces the tail end of the fusion cage body; a holding clamping groove is formed in the side wall of the bone grafting groove, and an inner wall clamping groove is formed in the outer side wall of the fusion cage body; the fusion cage implanting holder is used for implanting the fusion cage body; and the fusion cage extractor is used for extracting the fusion cage body. According to the interbody fusion cage implanting system, after the fusion cage body is implanted into the body of a patient through the fusion cage implanting holder, broken bones are implanted through the opening in the rear end of the bone grafting groove, falling of the broken bones in the implanting process is avoided, the fusion cage body with the position needing to be adjusted can be taken out through the fusion cage extractor, and the operation efficiency is improved.

The present invention discloses an intervertebral fusion device, including a main body, the outer wall of the main body has a cylindrical surface, and the cylindrical surface is provided with gear teeth. The intervertebral fusion device of the present invention is convenient for adjusting the implantation angle of the intervertebral fusion device and reducing the deviation of the implantation angle. The present invention also discloses an implantation device, including: a shell, which has a hollow inner cavity, and the front end of the hollow inner cavity is provided with an opening; a first gear, which is rotatably arranged in the hollow inner cavity; a driving member, the driving member drives the first gear to rotate; a clamping mechanism, the clamping mechanism has a clamping cavity; an intervertebral fusion device, which is the above-mentioned intervertebral fusion device and various improved schemes thereof, the main body is rotatably arranged in the clamping cavity, and the first gear is meshed with the gear teeth for transmission. The implantation device of the present invention can adjust the implantation angle of the intervertebral fusion device during the implantation process, thereby improving the surgical efficiency and helping to reduce the surgical time. The present invention can be applied to a prosthesis that can be transplanted into the body.

The application provides a three-period minimal surface intervertebral fusion cage design method, relates to the technical field of porous structure design, and determines a design domain of a three-period minimal surface TPMS porous structure region, combines individual vectors of modeling parameters of corresponding TPMS of each region, randomly generates a plurality of individual vectors, and forms an initial population; finite element simulation is carried out on the TPMS porous model corresponding to each individual vector, so as to divide the initial population into a load advantage population and a pore advantage population; the individual vectors are selected from the load advantage population and the pore advantage population respectively to perform improved neighborhood directional crossover operation; an optimal three-period minimal surface TPMS porous structure region is obtained through iterative genetic algorithm; through improved crossover operation and neighborhood directional crossover between the load advantage population and the pore advantage population, the new generation of individuals can consider both load performance and pore performance, and optimization is avoided around a single performance.

A trans-facet procedure for preparing a patient for oblique lateral lumbar interbody fusion (OLLIF). The preparation procedure includes providing a kit with instruments for accessing Kambin's triangle through bone at nominal approaches preferred for the OLLIF procedure, and providing instructions for the procedure on a non-transitory tangible medium.

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 multi-portal method for treating a subject’s spine includes distracting adjacent vertebrae using a distraction instrument positioned at a first entrance along the subject to enlarge an intervertebral space between the adjacent vertebrae. An interbody fusion implant can be delivered into the enlarged intervertebral space. The interbody fusion implant can be positioned directly between vertebral bodies of the adjacent vertebrae while endoscopically viewing the interbody fusion implant using an endoscopic instrument. The patient’s spine can be visualized using endoscopic techniques to view, for example, the spine, tissue, instruments and implants before, during, and after implantation, or the like. The visualization can help a physician throughout the surgical procedure to improve patient outcome.

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.

A method of performing a transcorporeal procedure including placement of a vertebral body replacement device into a transcorporeal void within a cervical spine is disclosed. The method includes creating a working channel through a vertebral body of a vertebra by removing at least a portion of the vertebral body of the vertebra, beginning anteriorly and extending inwardly toward the epidural space, the working channel extending from an anterior wall through a posterior wall, and placing the vertebral body replacement device within the working channel, the placement of the vertebral body replacement device leaving the inferior and superior endplates to perform their function and leaving at least a portion of the intervertebral disc functional thereby avoiding an intervertebral fusion to an adjacent vertebra.

The utility model discloses a bionic movement intervertebral fusion replacement device, and relates to the technical field of medical instruments. In order to solve the problem that an existing fusion cage does not move relatively and does not conform to normal physiological characteristics of human beings, the following technical scheme is provided: the fusion cage comprises an upper fusion body, a lower fusion body and a lining, the bottom of the upper fusion body is rotatably connected with the top of the lining, and the lining is detachably connected to the top of the lower fusion body. A groove is formed in the bottom of the upper fusion body, the shape of the groove is matched with the shape of the top of the lining, the top of the lining is of an arc-shaped structure, porous structures are arranged at the top of the upper fusion body and the bottom of the lower fusion body respectively, and barb structures are arranged at the top of the upper fusion body and the top of the lower fusion body. The side end of the lower fusion body is provided with a rotary outer blocking piece, and a bolt locking lining is arranged outside the rotary outer blocking piece. The defect that the fusion cage cannot move relatively can be overcome, normal physiological characteristics of human beings are better met, and meanwhile sufficient supporting force and bone ingrowth capacity are achieved.

Interbody fusion devices and related methods of manufacture are described herein. An example interbody fusion device can include a plurality of vertebral endplates, and a body extending between the vertebral endplates. The body and the vertebral endplates can define an internal cavity. Additionally, each of the vertebral endplates can include a lattice structure and a frame surrounding the lattice structure, where the lattice structure being configured to distribute load. Each of the vertebral endplates can also include a plurality of micro-apertures having an average size between about 2 to about 10 micrometers (μm), and a plurality of macro-apertures having an average size between about 300 to about 800 micrometers (μm).