CN115399925A - Intervertebral disc prosthesis with adjustable centre of rotation - Google Patents
Intervertebral disc prosthesis with adjustable centre of rotation Download PDFInfo
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- CN115399925A CN115399925A CN202210991933.6A CN202210991933A CN115399925A CN 115399925 A CN115399925 A CN 115399925A CN 202210991933 A CN202210991933 A CN 202210991933A CN 115399925 A CN115399925 A CN 115399925A
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- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 230000033001 locomotion Effects 0.000 claims abstract description 26
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 230000003028 elevating effect Effects 0.000 claims 2
- 210000000988 bone and bone Anatomy 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 210000004872 soft tissue Anatomy 0.000 abstract description 3
- 230000009894 physiological stress Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 206010041591 Spinal osteoarthritis Diseases 0.000 description 2
- 208000036319 cervical spondylosis Diseases 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007850 degeneration Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035790 physiological processes and functions Effects 0.000 description 2
- 208000005801 spondylosis Diseases 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 201000005671 spondyloarthropathy Diseases 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 210000002517 zygapophyseal joint Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/48—Operating or control means, e.g. from outside the body, control of sphincters
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- Oral & Maxillofacial Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
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- Orthopedic Medicine & Surgery (AREA)
- Prostheses (AREA)
Abstract
The invention relates to the technical field of intelligent medical instruments and discloses an intervertebral disc prosthesis with an adjustable rotation center. The invention comprises an upper end plate, a lower end plate and a nucleus pulposus prosthesis arranged between the upper end plate and the lower end plate, wherein the nucleus pulposus prosthesis comprises a first prosthesis and a second prosthesis which are arranged up and down; the invention adjusts the position of the nucleus pulposus prosthesis through the driving mechanism, so that the prosthesis and the cervical vertebra movement function unit are anatomically and coordinately operated, thereby reducing the non-physiological stress and strain in bone and soft tissue structures, reconstructing the physiological rotation center of the movement section to the maximum extent, improving the curative effect of CDR operation and reducing the occurrence of adverse events.
Description
Technical Field
The invention relates to the technical field of intelligent medical instruments, in particular to an intervertebral disc prosthesis with an adjustable rotation center.
Background
Currently, cervical disc replacement surgery (CDR) has been proven to be an effective therapy for radicular cervical spondylosis and myelogenous cervical spondylosis, and the purpose of CDR is to restore the normal biomechanical function of cervical spondylopathy segments. The CDR has the advantages over the classic anterior cervical decompression bone grafting fusion (ACDF) that the movement function of the operation segment can be preserved and the degeneration of the adjacent segment can be delayed. The design concept of the CDR not only needs to reserve the number of segmental motion, but also needs to be able to simulate the natural nature of the motion, thereby ensuring the quality of the motion. The range of motion (ROM) of the intervertebral disc is currently used clinically to evaluate the mobility of the artificial intervertebral disc, reflecting the change in the amount of motion, while the center of rotation (COR) can reflect the change in the kinematic properties. In spinal kinematics studies, COR is commonly used to describe the motion of the superior vertebral body relative to the inferior vertebral body, i.e., the motion of the functional units of the spine (FSU).
The rotation center of the existing intervertebral disc prosthesis can not be adjusted, so that the rotation center of the spinal functional segment in a physiological state can not be sufficiently matched, and after the intervertebral disc prosthesis is implanted, non-physiological collision, load and the like are easily generated on uncinate vertebral joints, facet joints and soft tissues, so that the degeneration is accelerated; and the mismatch causes relative movement of the endophyte-bone interface in daily activities, which leads to adverse events such as prosthesis subsidence and displacement, bone dissolution and even prosthesis extrusion. In addition, the cervical vertebrae of different patients and the rotation centers of different operative segments of the same patient are different, and the rotation center of the existing prosthesis design cannot adapt to the patients with different cervical vertebrae characteristics and the rotation centers of different segments.
Disclosure of Invention
The invention aims to provide an intervertebral disc prosthesis with an adjustable rotation center, which can adjust the position of the rotation center.
The technical scheme adopted by the invention for solving the technical problems is as follows: the intervertebral disc prosthesis with the adjustable rotating center comprises an upper end plate, a lower end plate and a nucleus pulposus prosthesis arranged between the upper end plate and the lower end plate, wherein the nucleus pulposus prosthesis comprises a first prosthesis and a second prosthesis which are arranged up and down; a matching space for the whole nucleus pulposus prosthesis to move in the vertical direction and the horizontal direction is arranged between the upper end plate and the lower end plate, and the device also comprises a driving mechanism for driving the whole nucleus pulposus prosthesis to move.
Further, the method comprises the following steps: mounting grooves are formed in one side, close to the nucleus pulposus prosthesis, of the upper end plate and one side, close to the lower end plate, of the lower end plate; the driving mechanism comprises a horizontal moving mechanism, the horizontal moving mechanism comprises a first sliding rod arranged in a first horizontal direction and a second sliding rod arranged in a second horizontal direction, the first horizontal direction is vertical to the second horizontal direction, the first sliding rod and the second sliding rod are fixedly arranged on the inner wall of the mounting groove, and the first sliding rod and the second sliding rod are both connected with a first sliding block in a sliding manner; the nucleus pulposus prosthesis is connected with a connecting rod in a sliding manner, one end of the connecting rod is fixedly connected with the first sliding block through a connecting piece, and the connecting rod comprises a first connecting rod parallel to the first sliding rod and a second connecting rod parallel to the second sliding rod; the driving mechanism further comprises a first driving device for driving the first sliding block to slide.
It is preferable that: the driving mechanism comprises a lifting mechanism, the lifting mechanism comprises a third sliding rod vertically arranged on the first sliding block, one end of the third sliding rod is fixedly arranged on the first sliding block, a second sliding block is connected to the third sliding rod in a sliding mode, the first connecting rod and the second connecting rod are fixedly connected with the second sliding block, and the driving mechanism further comprises a second driving device used for driving the second sliding block to slide.
More preferably: a first distance sensor is arranged on the nucleus pulposus prosthesis, and second distance sensors are arranged on the first sliding block and the second sliding block.
More preferably: the first sliding rod, the second sliding rod and the third sliding rod are screw rods, and corresponding threaded through holes are formed in the first sliding block and the second sliding block.
Further: the connecting end of the third sliding rod is provided with a clamping ring, a clamping groove matched with the clamping ring is formed in the first sliding block, and the clamping ring is clamped in the clamping groove; the end part of the third slide bar is provided with a shaft hole along the axial direction, and one side of the first slide block, which is close to the third slide bar, is provided with a rotating shaft matched with the shaft hole.
Further, the method comprises the following steps: the first sliding rod and the second sliding rod are both provided with two sliding rods, and the first sliding rod and the second sliding rod are enclosed to form a rectangle.
Further, the method comprises the following steps: permanent magnets are arranged on one side, close to the mounting groove of the upper end plate, of the nucleus pulposus prosthesis and one side, close to the mounting groove of the lower end plate, of the nucleus pulposus prosthesis, and a plurality of inductance coils used for driving the nucleus pulposus prosthesis to move horizontally and move up and down through magnetic force are arranged in the mounting grooves.
Further, the method comprises the following steps: the driving mechanism comprises a first driving mechanism and a second driving mechanism, and the first driving mechanism is used for driving the lower part of the nucleus pulposus prosthesis to move; the second drive mechanism is used to drive the movement of the upper portion of the nucleus prosthesis.
The beneficial effects of the invention are:
1. the first prosthesis and the second prosthesis are buckled with each other and can rotate relatively, so that the motion flexibility after being implanted into a human body is met, the position of the whole nucleus pulposus prosthesis is adjusted through the driving mechanism, the rotating center of the nucleus pulposus prosthesis can be adjusted to an adaptive position corresponding to a physiological state, the prosthesis and the cervical vertebra motion function unit are anatomical and coordinated to work, the non-physiological stress and strain in bone and soft tissue structures are reduced, the physiological rotating center of a motion section can be reconstructed to the maximum extent, the CDR surgery curative effect is improved, and the occurrence of adverse events is reduced;
2. a moving guide rail system of the nucleus pulposus prosthesis is established through mechanisms such as a sliding rod, a sliding block and the like, and the nucleus pulposus prosthesis can move under the action of a driving mechanism; the invention adopts screw rod transmission, and can realize position adjustment through manual twisting without depending on mechanical equipment or a control system, thereby facilitating the adjustment; the other driving mode of the invention adopts magnetic force to drive the nucleus pulposus prosthesis to move, controls the current of the inductance coils at different positions, controls the nucleus pulposus prosthesis to move by utilizing the magnetic attraction or repulsion, is suitable for small-sized precise devices such as intervertebral disc prosthesis, and is more convenient for adjusting the rotating center by matching with an automatic control element.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the drive configuration within the lower endplate;
FIG. 3 is a schematic view of the lower endplate;
FIG. 4 is a schematic view of a connection structure of a third sliding bar and a first sliding block;
FIG. 5 is a schematic diagram of the arrangement of an inductor coil in a mounting slot;
labeled in the figure as: the upper end plate 1, the lower end plate 2, the first prosthesis 3, the second prosthesis 4, the first sliding rod 5, the second sliding rod 6, the first sliding block 7, the third sliding rod 8 and the second sliding block 9.
Detailed Description
In the description of the present invention, it should be noted that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the product of the present invention is used to conventionally place, or the orientation or positional relationship that is conventionally understood by those skilled in the art, and such terms are only used for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In this context, "parallel," "perpendicular," and the like are not strictly mathematical and/or geometric limitations, but also encompass tolerances as would be understood by one skilled in the art and permitted by fabrication or use.
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1, the intervertebral disc prosthesis with an adjustable rotation center of the present invention includes an upper end plate 1, a lower end plate 2 and a nucleus pulposus prosthesis arranged between the upper end plate 1 and the lower end plate 2, wherein the nucleus pulposus prosthesis includes a first prosthesis 3 and a second prosthesis 4 arranged up and down, the first prosthesis 3 is provided with a ball head, the second prosthesis 4 is provided with a spherical groove adapted to the ball head, the first prosthesis 3 and the second prosthesis 4 are fastened with each other and can rotate relatively, and the present invention simulates the physiological actions of the intervertebral disc of the spine, such as the movement modes of anteflexion, backward extension, left and right lateral flexion, rotation, coupling movement and the like, so as to ensure the flexibility of the movement of the human body after implantation; specifically, one second prosthesis 4 is arranged in the lower end plate 2, the first prosthesis 3 is arranged above the second prosthesis 4 and in the upper end plate 1, and the two are clamped with the spherical groove through the spherical head and are in rotating fit; two second prostheses 4 can also be arranged and are respectively arranged in the upper end plate 1 and the lower end plate 2, the upper part and the lower part of the first prosthesis 4 are provided with ball heads, and the first prosthesis 4 is rotatably connected between the upper and the lower second prostheses 4. In order to enable the rotation center of the nucleus pulposus prosthesis to adapt to patients with different cervical vertebra characteristics and rotation centers of different segments, a driving mechanism capable of adjusting the position of the nucleus pulposus prosthesis is further arranged, the driving mechanism is arranged in the mounting grooves of the lower end plate 2 and the upper end plate 1, a matching space is formed between the two mounting grooves of the lower end plate 2 and the upper end plate 1, the driving mechanism comprises a first driving mechanism and a second driving mechanism, and the first driving mechanism is arranged in the mounting groove on one side, close to the lower end plate 2, of the nucleus pulposus prosthesis and is used for driving the lower part of the nucleus pulposus prosthesis to move; the second driving mechanism is arranged in a mounting groove at one side of the nucleus pulposus prosthesis close to the upper end plate 1 and is used for driving the upper part of the nucleus pulposus prosthesis to move. The first drive mechanism and the second drive mechanism simultaneously drive the lower portion and the upper portion of the nucleus prosthesis, and the overall movement of the nucleus prosthesis is synchronized.
Further, the driving mechanism comprises a lifting mechanism and a horizontal moving mechanism, the horizontal moving mechanism comprises a first sliding rod 5 arranged in a first horizontal direction and a second sliding rod 6 arranged in a second horizontal direction, the first horizontal direction and the second horizontal direction are perpendicular to each other, the first sliding rod 5 and the second sliding rod 6 are both connected with a first sliding block 7 in a sliding manner so as to adjust the position of the nucleus pulposus prosthesis in the same horizontal plane, the first sliding rod 5 and the second sliding rod 6 of the first driving mechanism are fixedly arranged in the lower end plate 2, the first sliding rod 5 and the second sliding rod 6 of the second driving mechanism are fixedly arranged in the upper end plate 1, and a driving device for driving the first sliding block 7 to slide can adopt a micro linear motor, a stepping motor and the like, and can also directly carry out adjustment manually; the nucleus pulposus prosthesis is connected on the connecting rod in a sliding manner, one end of the connecting rod is fixedly connected with the first sliding block 7 through the connecting piece, the connecting rod comprises a first connecting rod parallel to the first sliding rod 5 and a second connecting rod parallel to the second sliding rod 6, and the connecting rod plays a supporting role when the nucleus pulposus prosthesis is adjusted in position.
Furthermore, in order to improve the stability of the nucleus pulposus prosthesis in the moving process, two first sliding rods 5 and two second sliding rods 6 are arranged, the two first sliding rods 5 and the two second sliding rods 6 are arranged in a rectangular shape, and then the two first sliding rods 5 and the two second sliding rods 6 are connected with a second sliding block 9 on a third sliding rod 8 through two connecting rods forming a cross shape. It will be appreciated that both connecting rods are arranged horizontally, and the relative positions of the connecting rods on the prosthesis are set one above the other, avoiding movement disturbances.
Furthermore, in this embodiment, the lifting mechanism is linked with the horizontal movement mechanism, the lifting mechanism includes a third slide bar 8 vertically disposed on the first slide block 7, one end of the third slide bar 8 is fixedly disposed on the first slide block 7, a second slide block 9 is slidably connected to the third slide bar 8, and the first connecting rod and the second connecting rod are both fixedly connected to the second slide block 9. The third slide bar 8 acts as a link connecting the vertically moving second slide 9 with the horizontally moving first slide 7.
When the rotation center of the nucleus pulposus prosthesis needs to be adjusted, the first slide bar 5 or the second slide bar 6 at the bottom and the top of the nucleus pulposus prosthesis is rotated clockwise or anticlockwise, the first slide block 7 slides in the positive direction or the negative direction on the corresponding slide bar, and the first slide block 7 drives the whole nucleus pulposus prosthesis to be adjusted in position on the horizontal plane; meanwhile, a plurality of third sliding rods 8 are arranged in a rotating mode along the same direction, the second sliding blocks 9 achieve ascending or descending actions, and the position of the whole nucleus pulposus prosthesis is adjusted in the vertical direction between the two installation grooves.
Furthermore, in order to realize the control of the adjusting distance, a first distance sensor is arranged on the nucleus pulposus prosthesis, and a second distance sensor is arranged on each of the first sliding block and the second sliding block. The first distance sensor is used for testing the relative position between the nucleus pulposus prosthesis and the inner wall of the mounting groove, so that the moving distance of the nucleus pulposus prosthesis can be conveniently monitored, the second distance sensor is used for testing the distance between the sliding block and the inner wall of the upper end plate 1 or between the sliding block and the inner wall of the lower end plate 2 in the corresponding sliding direction, the movement of the nucleus pulposus prosthesis is further monitored and controlled, and the control precision of the position of the rotation center is improved.
Furthermore, in order to conveniently control the starting and stopping of the sliding block, as shown in fig. 2 and 3, the first sliding rod 5, the second sliding rod 6 and the third sliding rod 8 are all screw rods, corresponding threaded through holes are respectively formed in the first sliding block 7 and the second sliding block 9, and the movement of the sliding blocks is controlled by the rotation of the screw rods; the first sliding rod 5 and the second sliding rod 6 are rotatably connected with the inner wall of the upper end plate 1 and the inner wall of the lower end plate 2. When the position of the nucleus pulposus prosthesis needs to be adjusted, the position adjustment of the first sliding block 7 and the second sliding block 9 can be realized by rotating the corresponding sliding rods, and the sliding rods are also fixed on the mounting grooves in a limiting manner while rotating. The driving device for driving the first slide bar 5 and the second slide bar 6 to rotate can adopt a miniature driving motor, a stepping motor and the like, and can also directly carry out adjustment manually. Preferably, as shown in fig. 4, a clamping ring is arranged at the connecting end of the third slide bar 8, a clamping groove adapted to the clamping ring is arranged in the first slide block 7, and the clamping ring is clamped in the clamping groove; the end part of the third slide bar 8 is provided with a shaft hole along the axial direction, and one side of the first slide block 7, which is close to the third slide bar 8, is provided with a rotating shaft matched with the shaft hole. The third sliding rod 8 is fixed through the limiting structure, and meanwhile, the rotation of the third sliding rod 8 is not influenced to bring the second sliding block 9 to move up and down.
The driving device of the invention is not limited to the mechanical power device described above for driving, and can be driven by magnetic force according to the principle that like poles attract each other and opposite poles repel each other, as long as the purpose of adjusting the position of the nucleus pulposus prosthesis between the upper end plate and the lower end plate can be achieved. Permanent magnets are fixedly arranged at the top and the bottom of the nucleus pulposus prosthesis, a plurality of inductance coils are arranged in the mounting groove, as shown in figure 5, circles in the figure are shown as axial sections of the inductance coils, magnetic poles of the permanent magnets are arranged corresponding to magnetic poles of the inductance coils when the inductance coils are electrified, and the axial directions of the inductance coils are arranged in the horizontal direction or the vertical direction.
Specifically, set up inductance coils on the first horizontal direction of mounting groove inner wall and the second horizontal direction respectively, inductance coils's axial and first horizontal direction, the second horizontal direction is located same direction, the inductance coils tip magnetic pole of relative both sides is the same magnetic pole of looks exclusive or when being located the inductance coils circular telegram on same horizontal direction, also be equipped with inductance coils along vertical direction at the mounting groove bottom surface, this inductance coils's axial is located vertical direction, permanent magnet magnetic pole on level or vertical direction sets up with the inductance coils magnetic pole in this direction relatively. It should be understood that the magnetic poles at the ends of the inductor coils can be changed by adjusting the current directions of the inductor coils at different positions, and the attractive force or the repulsive force can also be controlled by adjusting the current on-off or the current magnitude of the inductor coils at different positions. Preferably, a current control device and a control system can be further arranged, the current control device and the distance sensor are electrically connected with the control system, and the control system is more convenient for operating the position adjustment of the nucleus pulposus prosthesis.
The magnetic force is used for driving the nucleus pulposus prosthesis to move, when the horizontal position needs to be adjusted, the inductance coils in the first horizontal direction and the second horizontal direction are electrified, the attraction force and the repulsion force of the magnetic poles are used for simultaneously acting the bottom and the top of the nucleus pulposus prosthesis, so that the whole nucleus pulposus prosthesis can move in the horizontal direction, and the position on the horizontal plane is adjusted; when the position in the vertical direction needs to be adjusted, the inductive coil in the vertical direction is electrified, and the magnetic poles of the inductive coil which is vertically arranged simultaneously act on the bottom and the top of the nucleus pulposus prosthesis, so that the nucleus pulposus prosthesis integrally ascends and descends in the vertical direction.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The intervertebral disc prosthesis with the adjustable rotation center comprises an upper end plate (1), a lower end plate (2) and a nucleus pulposus prosthesis arranged between the upper end plate (1) and the lower end plate (2), and is characterized in that: the nucleus pulposus prosthesis comprises a first prosthesis (3) and a second prosthesis (4) which are arranged up and down, wherein the first prosthesis (3) is provided with a bulb part, the second prosthesis (4) is provided with a spherical groove which is adaptive to the bulb part, and the first prosthesis (3) and the second prosthesis (4) are mutually buckled and can relatively rotate; a matching space for the whole nucleus pulposus prosthesis to move in the vertical direction and the horizontal direction is arranged between the upper end plate (1) and the lower end plate (2), and the device also comprises a driving mechanism for driving the whole nucleus pulposus prosthesis to move.
2. The center-of-rotation adjustable intervertebral disc prosthesis of claim 1, wherein: mounting grooves are formed in one side, close to the nucleus pulposus prosthesis, of the upper end plate (1) and one side, close to the nucleus pulposus prosthesis, of the lower end plate (2); the driving mechanism comprises a horizontal moving mechanism, the horizontal moving mechanism comprises a first sliding rod (5) arranged in a first horizontal direction and a second sliding rod (6) arranged in a second horizontal direction, the first horizontal direction is perpendicular to the second horizontal direction, the first sliding rod (5) and the second sliding rod (6) are fixedly arranged on the inner wall of the mounting groove, and a first sliding block (7) is connected to the first sliding rod (5) and the second sliding rod (6) in a sliding manner; the nucleus pulposus prosthesis is connected with a connecting rod in a sliding manner, one end of the connecting rod is fixedly connected with a first sliding block (7) through a connecting piece, and the connecting rod comprises a first connecting rod parallel to the first sliding rod (5) and a second connecting rod parallel to the second sliding rod (6); the driving mechanism also comprises a first driving device for driving the first sliding block (7) to slide.
3. The adjustable center of rotation intervertebral disc prosthesis of claim 2, wherein: actuating mechanism includes elevating system, and elevating system includes vertical third slide bar (8) of setting on first slider (7), and a third slide bar (8) tip is fixed to be set up on first slider (7), sliding connection has second slider (9) on third slide bar (8), head rod, second connecting rod all with second slider (9) fixed connection, actuating mechanism is still including being used for driving the gliding second drive arrangement of second slider (9).
4. The adjustable center of rotation intervertebral disc prosthesis of claim 3, wherein: a first distance sensor is disposed on the nucleus prosthesis.
5. The adjustable center of rotation intervertebral disc prosthesis of claim 3, wherein: the first sliding rod (5), the second sliding rod (6) and the third sliding rod (8) are screw rods, and corresponding threaded through holes are formed in the first sliding block (7) and the second sliding block (9).
6. The center of rotation adjustable intervertebral disc prosthesis of claim 5, wherein: a clamping ring is arranged at the connecting end of the third sliding rod (8), a clamping groove matched with the clamping ring is arranged in the first sliding block (7), and the clamping ring is clamped in the clamping groove; the end part of the third slide bar (8) is provided with a shaft hole along the axial direction, and one side of the first slide block (7) close to the third slide bar (8) is provided with a rotating shaft matched with the shaft hole.
7. The adjustable center of rotation intervertebral disc prosthesis of claim 2, wherein: the first sliding rod (5) and the second sliding rod (6) are both provided with two sliding rods, and the first sliding rod (5) and the second sliding rod (6) are arranged in a rectangular shape in an enclosing mode.
8. Intervertebral disc prosthesis with adjustable centre of rotation according to claim 2, 3 or 4, characterised in that: permanent magnets are arranged on one side, close to the mounting groove of the upper end plate (1), of the nucleus pulposus prosthesis and on one side, close to the mounting groove of the lower end plate (2), of the nucleus pulposus prosthesis, and a plurality of inductance coils used for magnetically driving the horizontal movement and the lifting movement of the nucleus pulposus prosthesis are arranged in the mounting grooves.
9. The adjustable center of rotation intervertebral disc prosthesis of claim 1, wherein: the driving mechanism comprises a first driving mechanism and a second driving mechanism, and the first driving mechanism is used for driving the lower part of the nucleus pulposus prosthesis to move; the second drive mechanism is used to drive the movement of the upper portion of the nucleus prosthesis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210991933.6A CN115399925A (en) | 2022-08-17 | 2022-08-17 | Intervertebral disc prosthesis with adjustable centre of rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210991933.6A CN115399925A (en) | 2022-08-17 | 2022-08-17 | Intervertebral disc prosthesis with adjustable centre of rotation |
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| CN115399925A true CN115399925A (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210991933.6A Pending CN115399925A (en) | 2022-08-17 | 2022-08-17 | Intervertebral disc prosthesis with adjustable centre of rotation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115281900A (en) * | 2022-08-17 | 2022-11-04 | 四川大学华西医院 | Automatic adjusting system for rotation center of intervertebral disc prosthesis |
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| US20060247782A1 (en) * | 2005-04-29 | 2006-11-02 | Sdgi Holdings, Inc. | System, device and methods for replacing the intervertebral disc with a magnetic or electromagnetic prosthesis |
| US20100094427A1 (en) * | 2008-10-14 | 2010-04-15 | Rudolf Bertagnoli | Movable Intervertebral Disc Prosthesis |
| US20140296919A1 (en) * | 2011-11-01 | 2014-10-02 | Ellipse Technologies, Inc. | Adjustable magnetic devices and methods of using same |
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| CN109620484A (en) * | 2018-12-19 | 2019-04-16 | 四川大学华西医院 | With the cervical vertebra joint replacement device of pyramidal portion excision |
| CN114081688A (en) * | 2021-11-12 | 2022-02-25 | 四川大学华西医院 | Fuse adjustable intelligent backbone intervertebral implant of non-fusion |
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| CN115281900A (en) * | 2022-08-17 | 2022-11-04 | 四川大学华西医院 | Automatic adjusting system for rotation center of intervertebral disc prosthesis |
| CN115281900B (en) * | 2022-08-17 | 2024-06-25 | 四川大学华西医院 | Automatic rotation center adjusting system for intervertebral disc prosthesis |
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