15 results about "Intervertebral disk prostheses" patented technology

The application belongs to the technical field of medical devices, and particularly relates to an intervertebral disc prosthesis. The intervertebral disc prosthesis comprises an upper endplate, a lower endplate and a nucleus pulposus; the nucleus pulposus is arranged between the upper endplate and the lower endplate; the nucleus pulposus is provided with a conical through hole penetrating the upper surface and the lower surface of the nucleus pulposus; the conical protruding structure of the lower endplate is arranged in the conical through hole of the nucleus pulposus, and the nucleus pulposus and the upper endplate and the lower endplate can slide around the arc surface of the nucleus pulposus in a certain space, and the conical protruding structure can prevent the nucleus pulposus from coming out. The upper and lower endplates are provided with sawtooth-shaped barb structures, which are beneficial to the initial stability after the intervertebral disc is implanted; the porous layers of the upper and lower endplates are both multi-scale aperture porous structures, which are matched with the mechanical properties of bone tissue, have excellent mass transfer performance and are beneficial to cell colonization; after the intervertebral disc prosthesis is implanted, bone tissue is guided to grow into the porous space of the upper and lower endplates, and a multi-scale aperture porous-bone interface is formed with the bone tissue, so that the biological fusion and long-term biological fixation of the prosthesis are realized.

The invention discloses an artificial intervertebral disc prosthesis based on PVA hydrogel and a preparation method of the artificial intervertebral disc prosthesis, the artificial intervertebral disc prosthesis prepared from polyvinyl alcohol comprises a soft prosthesis, a hard prosthesis, a nuclear ring composite prosthesis and a nuclear fibrous ring composite prosthesis, and the artificial intervertebral disc prosthesis is high in biocompatibility and low in cost; the hard prosthesis and the nuclear ring composite prosthesis which are prepared through high-temperature drying and the nuclear fiber ring composite prosthesis which is prepared through stretching and fixing and then high-temperature drying have good fracture toughness and fatigue performance and can achieve the mechanical performance of a natural intervertebral disc prosthesis, and the preparation process is simple. In addition, the multi-layer fiber structure of the fibrous ring in the nuclear fibrous ring composite prosthesis is closer to that of a natural intervertebral disc fibrous ring, and the nuclear fibrous ring composite prosthesis has important significance in accelerating postoperative recovery and long-term use of the artificial intervertebral disc prosthesis.

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

Systems and methods for implantation of an intervertebral disc prosthesis include the prosthesis, a cartridge, and an instrument. Prior to implantation of the prosthesis, the cartridge receives and engages with the prosthesis to form an assembly. In addition, the instrument receives the assembly within an opening in an outer housing and engages the cartridge with a coupler of a locking shaft. Following implantation of the cartridge, actuation of a release driver causes an expansion bit of the release driver to engage release tabs on the cartridge to cause the cartridge to disengage from the prosthesis. The systems and methods optionally include a trial implant and / or an osteotome for trialing prior to implantation of the prosthesis.

Intervertebral disk prosthesis comprising an external waterproof multilayered deformable casing surrounding a peripheral partition membrane delimiting an outer space and an inner cavity, wherein the inner cavity is partitioned by vertical walls delimiting at least four cavity compartments configured to be filled with a non-toxic saline solution, and wherein the vertical walls comprise orifices and / or porous membranes configured to induce the saline solution to flow from one cavity compartment toward another upon heterogeneous application of a pressure comprised between 0.05 and 3 MPa in a duration comprised between 10 seconds and 60 minutes, and to revert back to its native compartment upon removal of said pressure in a duration comprised between 10 seconds and 180 minutes, and wherein the walls are distributed asymmetrically in the inner cavity so that a posterior part of the inner cavity comprises fewer and / or larger cavity compartments than an anterior part of the inner cavity.

The invention relates to an artificial intervertebral disc prosthesis that can mimic all movements in the sagittal or longitudinal, horizontal or axial or transverse plane, in coronal or frontal planes, forwards, backwards, right and left, and provides sufficient mechanical support for this, in particular for use in the treatment of cervical degenerative disc disease.

Systems and methods for implantation of an intervertebral disc prosthesis include the prosthesis, a cartridge, and an instrument. Prior to implantation of the prosthesis, the cartridge receives and engages with the prosthesis to form an assembly. In addition, the instrument receives the assembly within an opening in an outer housing and engages the cartridge with a coupler of a locking shaft. Following implantation of the cartridge, actuation of a release driver causes an expansion bit of the release driver to engage release tabs on the cartridge to cause the cartridge to disengage from the prosthesis. The systems and methods optionally include a trial implant and / or an osteotome for trialing prior to implantation of the prosthesis.

This invention discloses a method for designing and fabricating a personalized artificial intervertebral disc prosthesis, belonging to the field of artificial intervertebral disc prosthesis technology. The invention aims to solve the problems of poor mechanical adaptability, lack of biomimetic structure, and design-manufacturing disconnect in existing prostheses. The steps include: S1, collecting kinematic and dynamic data of the lumbar spine under healthy conditions to obtain the torque-rotation curve of the target vertebral segment; S2, establishing and validating a finite element model based on MRI / CT, ​​with motion deviation within 5%; S3, constructing a biomimetic intervertebral disc including a biomimetic nucleus pulposus, transition zone, annulus fibrosus, and endplate, wherein the number, diameter, stiffness gradient, and arrangement of biomimetic fibers are adjustable; S4, establishing a quadratic regression equation with the target curve as the optimization target to obtain optimal parameters with a matching degree ≥90%; S5, using multi-material additive manufacturing for integrated molding. This invention achieves individualized stiffness matching and biomimetic structure reproduction, improves fatigue and shear resistance, and is suitable for personalized customization of the lumbar spine.

Systems and methods for implantation of an intervertebral disc prosthesis include the prosthesis, a cartridge, and an instrument. Prior to implantation of the prosthesis, the cartridge receives and engages with the prosthesis to form an assembly. In addition, the instrument receives the assembly within an opening in an outer housing and engages the cartridge with a coupler of a locking shaft. Following implantation of the cartridge, actuation of a release driver causes an expansion bit of the release driver to engage release tabs on the cartridge to cause the cartridge to disengage from the prosthesis. The systems and methods optionally include a trial implant and / or an osteotome for trialing prior to implantation of the prosthesis.

Systems and methods are provided for robotically assisted disc prosthesis selection and implantation. The system includes a 3D modeling system for creating a 3D model of first and second vertebra adjacent the intended surgical site and identifying and storing data for the positions of the first and second vertebrae. A computing system for stores and processes the 3D model and the position data. A robot connected to the computing system attaches to a plurality of instruments including sizing templates, trials, cutters or placement instruments for intervertebral disc prostheses. An interface on the computing system allows the surgeon to sequentially deliver the plurality of instruments with the robot to a registration position to improve the speed and accuracy of the surgical procedure.

Systems and methods for robotically preparing a disc space are provided for implantation of an intervertebral prosthetic disc. The system includes three-dimensional modeling to identify positions of vertebrae adjacent a surgical site and a disc selection interface in a computing system to allow the surgeon to select an intervertebral disc prosthesis for implantation. A bone cutting interface allows the surgeon to determine a bone cutting pattern tailored to both the three-dimensional positions of the vertebrae and the selected intervertebral disc. A robot controls a cutting device or guides a cutting device to cut the vertebral bone in the bone cutting pattern.

Systems and methods are provided for robotically assisted disc prosthesis selection and implantation. The system includes a 3D modeling system for creating a 3D model of first and second vertebra adjacent the intended surgical site and identifying and storing data for the positions of the first and second vertebrae. A computing system for stores and processes the 3D model and the position data. A robot connected to the computing system attaches to a plurality of instruments including sizing templates, trials, cutters or placement instruments for intervertebral disc prostheses. An interface on the computing system allows the surgeon to sequentially deliver the plurality of instruments with the robot to a registration position to improve the speed and accuracy of the surgical procedure.

Systems and methods for implantation of an intervertebral disc prosthesis include the prosthesis, a cartridge, and an instrument. Prior to implantation of the prosthesis, the cartridge receives and engages with the prosthesis to form an assembly. In addition, the instrument receives the assembly within an opening in an outer housing and engages the cartridge with a coupler of a locking shaft. Following implantation of the cartridge, actuation of a release driver causes an expansion bit of the release driver to engage release tabs on the cartridge to cause the cartridge to disengage from the prosthesis. The systems and methods optionally include a trial implant and / or an osteotome for trialing prior to implantation of the prosthesis.

The application belongs to the technical field of intervertebral disc simulation test, and particularly relates to a multi-degree-of-freedom coupling loading test method and device for intervertebral disc and intervertebral disc prosthesis based on a Stewart platform. The device comprises an upper seat and a lower seat, a plurality of actuating arms are arranged between the upper seat and the lower seat, each actuating arm is connected with a driving unit, the driving unit is connected with a control unit, a sensor and an upper clamp are mounted on the lower surface of the upper seat, the upper clamp is used for clamping the upper cone of the intervertebral disc prosthesis, the sensor is electrically connected with the control unit, and the sensor is used for detecting load data, an extension adjusting shaft is mounted on the upper surface of the lower seat, the other end of the extension adjusting shaft is provided with a lower clamp, and the lower clamp is used for clamping the lower cone of the sample. The multi-degree-of-freedom coupling loading test device for intervertebral disc and intervertebral disc prosthesis based on the Stewart platform can perform six-degree-of-freedom coupling loading test and characterization on the intervertebral disc and the replacement prosthesis, the result is accurate, the device is simple, and the cost is low.