WO2021038982A1 - 椎体間スペーサーを椎体間にガイドするシステム - Google Patents
椎体間スペーサーを椎体間にガイドするシステム Download PDFInfo
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- WO2021038982A1 WO2021038982A1 PCT/JP2020/019786 JP2020019786W WO2021038982A1 WO 2021038982 A1 WO2021038982 A1 WO 2021038982A1 JP 2020019786 W JP2020019786 W JP 2020019786W WO 2021038982 A1 WO2021038982 A1 WO 2021038982A1
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- interbody spacer
- guide rail
- vertebral bodies
- ventral
- rail portion
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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
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses
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- 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
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- A—HUMAN NECESSITIES
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- 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
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
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- 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
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- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
- A61F2/4465—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
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- 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
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- 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
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30113—Rounded shapes, e.g. with rounded corners circular
- A61F2002/30121—Rounded shapes, e.g. with rounded corners circular with lobes
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- 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
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30133—Rounded shapes, e.g. with rounded corners kidney-shaped or bean-shaped
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- 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
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
- A61F2002/30261—Three-dimensional shapes parallelepipedal
- A61F2002/30266—Three-dimensional shapes parallelepipedal wedge-shaped parallelepipeds
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- A—HUMAN NECESSITIES
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- 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
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
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- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
- A61F2002/30387—Dovetail connection
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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
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
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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
- A61F2002/448—Joints for the spine, e.g. vertebrae, spinal discs comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
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- A—HUMAN NECESSITIES
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- 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
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- 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
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- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2002/4622—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof having the shape of a forceps or a clamp
Definitions
- the present invention relates to a system for guiding an interbody spacer between vertebral bodies.
- interbody spacers are essential for obtaining bone fusion by PLIF (Posterior Lumbar Interbody fusion), and by inserting spacers that are as large as possible and suitable for the interbody shape. , It is possible to stabilize the space between the vertebral bodies and obtain stronger fixation.
- the large spacer is expected to be able to fill more bones to be transplanted and the like, and is considered to contribute to future interbody bone fusion.
- Insertion of a unilateral interbody spacer using a conventional box-type interbody spacer by unilateral approach or unilateral facet joint excision may cause contralateral interbody instability, which is disadvantageous for bone fusion. there is a possibility.
- bilateral approach and insertion of box-type interbody spacers from both sides by bilateral facet joint resection may cause intervertebral instability.
- unilateral approach, contralateral insertion of interbody spacers by unilateral facet resection, or conventional boomerang-type interbody spacer insertion provides contralateral support while preserving the contralateral facet joints. It is a rational method because it can be done.
- the annulus fibrosus of the intervertebral disc 2 between the vertebral bodies 1 shown in FIG. 1 is fenestrated to remove the inner nucleus pulposus, and after the removal.
- An intervertebral spacer is inserted between the vertebral bodies for installation. Since the spinal nerve system and blood vessels pass near the intervertebral disc 2, great care is required in the surgery.
- the interbody spacer Since the spinal column plays a role of supporting weight, the interbody spacer is required to have high rigidity and cover a large area between vertebral bodies, and the surgical field is narrow, and the nervous system and blood vessels are nearby. Since it passes through, it is necessary to have the skill and surgical system to install the interbody spacer in an appropriate position while avoiding these.
- interbody spacers With conventional interbody spacers, the size of the interbody spacer that can be inserted through a narrow insertion slot has been limited. For this reason, flexible interbody spacers and insertion devices that can be turned inside the interbody have been developed so far, but many systems are structurally complicated and have vulnerabilities associated with them. There are few things that have been put into practical use.
- the interbody spacers are connected to each other by a flexible bridge.
- the interbody spacer is a mechanism that is inserted into the intubation tube, passes through the intubation tube, and is inserted and installed between the vertebral bodies.
- the structure of the interbody spacer is complicated, and the rigidity of the interbody spacer is low.
- the insertion instrument is provided with a guide rail for guiding the bottom surface of the interbody spacer and a guide rail for guiding the bottom surface, the upper surface and the side surface, so that the interbody spacer is guided to a narrow surgical field. Remains a challenge.
- the interbody spacer has an expandable function. It is a system that expands the interbody spacer within the interbody after installing the interbody spacer in the non-expanded state using an instrument between the vertebral bodies. Many parts of the interbody spacer are connected by pins or the like, and the structure is complicated and the rigidity is low. In addition, since the interbody spacer must be expanded after the interbody spacer is installed in the non-expanded state between the vertebral bodies, the system is complicated and requires a high skill of a doctor in surgery.
- the interbody spacer is an integral body and has rigidity.
- the instrument for installing the interbody spacer has a grip that grips the pin provided on the interbody spacer, and the doctor installs it while adjusting the orientation of the interbody spacer in a narrow surgical field. There is a problem that the operation becomes difficult because it has to be done.
- An object of the present invention is to provide a simple system in which an interbody spacer can be easily and accurately installed at a predetermined position between vertebral bodies even in a narrow surgical field.
- the present invention (1) is a system for treating a spinal disorder, which is a horizontally curved interbody spacer used by being inserted between the vertebral bodies.
- Each of the vertebral bodies is provided with a pair of contact surfaces, the pair of contact surfaces are connected on the ventral side, and the ventral side surface, which is a convex ventral side surface in a plan view, and the pair of contact surfaces.
- Interbody spacers that are connected on the dorsal side and are provided with a dorsal side surface that is a concave dorsal side surface in a plan view, and the ventral side surface and / or the dorsal side surface have an engaging portion along the curved direction.
- a guide device that guides the interbody spacer to a predetermined position between the vertebral bodies, and is fitted to the distal end side with one of the ventral or dorsal engaging portions.
- a system having a guide rail portion to be fitted, and a guide device having a plan-view radius of curvature of the guide rail portion that is substantially the same as the plan-view radius of curvature of the ventral or dorsal side.
- One of the cross section of the engaging portion and the guide rail portion has a concave shape, and the other has a convex shape corresponding to the concave shape, and the concave shape is the same concave shape facing the convex shape. It is a system having a maximum width portion wider than the opening width of the shape.
- the ventral and / or dorsal surfaces of the interbody spacer are provided with engaging portions along the curved direction.
- the distal end side of the guide device has a guide rail portion that is fitted with any one of the ventral or dorsal side engagement portions. Since the radius of curvature of the guide rail portion in a plan view is substantially the same as the radius of curvature of the ventral or dorsal surface in a plan view, the interbody spacer can be moved along the guide rail portion. As long as the guide device is installed in a predetermined position, the interbody spacer can be accurately and easily guided to a predetermined appropriate position between the vertebral bodies.
- the dura when inserting from the TLIF (Transforaminal Lumbar Interbody Fixation) approach, the dura is rotated around the approximate center, and the lateral edge to the anterior edge and the contralateral side of the intervertebral space are used. It is inserted so as to touch the outer edge of the.
- the interbody spacer By inserting the interbody spacer along the guide rail of the guide device installed in advance between the vertebral bodies, the interbody spacer can be safely inserted to the optimum position on the contralateral side more accurately and easily. Can be inserted.
- the present invention (2) is the system of the present invention (1) in which the width of the guide rail portion is equal to or less than the height of the ventral side surface and / or the dorsal side surface of the interbody spacer.
- the interbody spacer can be smoothly placed at a predetermined position between the vertebral bodies even in a narrow surgical field. Can be installed in.
- the present invention (3) is characterized in that the cross section of the engaging portion has a T-shaped concave shape, and the cross section of the guide rail portion has a T-shaped convex shape (3). It is the system of 1) or (2).
- the cross section of the engaging portion on the interbody spacer side has a T-shaped concave shape
- the cross section of the guide rail portion has a T-shaped convex shape.
- the present invention (4) is characterized in that the cross section of the engaging portion has a T-shaped convex shape, and the cross section of the guide rail portion has a T-shaped concave shape (4). It is the system of 1) or (2).
- the cross section of the engaging portion on the interbody spacer side has a T-shaped convex shape
- the cross section of the guide rail portion has a T-shape. Due to the concave shape of the guide rail, the interbody spacer can be easily installed at a predetermined position between the vertebral bodies by being guided along the concave rail of the guide rail portion.
- the present invention (5) is an interbody spacer according to any one of the present inventions (1) to (4).
- the interbody spacer can be accurately and easily installed at a predetermined position between the vertebral bodies.
- the present invention (6) is a guide device according to any one of the present inventions (1) to (4).
- the interbody spacer can be accurately and easily installed at a predetermined position between the vertebral bodies.
- the interbody spacer can be easily and accurately installed at a predetermined position between the vertebral bodies even in a narrow surgical field.
- a side view of the spine (lumbar spine) is shown.
- the perspective view which installed the guide instrument between the vertebral bodies is shown.
- the perspective view of Example 1 of the interbody spacer according to this invention is shown.
- the plan view, the inner side view, the outer side view and the ventral side view of Example 1 of the interbody spacer according to this invention are shown.
- the perspective view of Example 2 of the guide apparatus according to this invention is shown.
- a plan view of Example 2 of the guide device according to the present invention is shown.
- a perspective view of Example 3 of the guide device according to the present invention is shown.
- a plan view of Example 3 of the guide device according to the present invention is shown.
- the interbody spacer according to the present invention is engaged with the inner circumference of the guide rail portion of the guide device of Example 2 and the ventral side surface of the interbody spacer, and the two interbody spacers are symmetrically installed between the vertebral bodies.
- the state is schematically shown.
- the interbody spacer according to the present invention is engaged with the outer circumference of the guide portion of the guide device of Example 3 and the dorsal surface of the interbody spacer, and the two interbody spacers are symmetrically installed between the vertebral bodies. Is schematically shown.
- a specific example of the engagement state between the interbody spacer of the system according to the present invention and the guide rail portion of the guide device is schematically shown.
- top and bottom shall mean the top and bottom of the figure. This "up and down” is for convenience, and when installed, it may be upside down or horizontal.
- FIG. 2 shows a schematic view of a state in which the guide rail portion 31 of the guide device 30 is inserted and installed between the caudal vertebral bodies 1A and the caudal vertebral body 1B as viewed from the ventral side. ing. The operator grabs the grip portion 32 and inserts it. Actually, the space between the cranial vertebral bodies 1A and the caudal vertebral bodies 1B is surrounded by a tissue called an annulus fibrosus, so it cannot be seen from the ventral side, but the installation state can be seen. In order to do so, the annulus fibrosus is omitted.
- FIG. 3 shows a perspective view of Example 1 of the interbody spacer according to the present invention when viewed from the ventral side.
- the upper surface 13 abuts on the caudal side of the caudal vertebral body 1A, and the lower surface 14 abuts on the caudal side of the caudal vertebral body 1B.
- the outer side surface 11 and the inner side surface 12 are located at both ends along the central axis CL.
- the overall shape is such that the ventral side is curved convexly.
- the ventral side surface is the ventral side surface 17, and the concave side surface is the dorsal side surface 18. Grooves and the like for firmly connecting the cranial vertebral body 1A and the caudal vertebral body 1B are engraved on the upper surface 13 and the lower surface 14, but these grooves and the like are omitted in FIG. There is.
- the interbody spacer 10 of Example 1 is provided with two holes penetrating the upper surface 13 and the lower surface 14, and these two holes are separated by an intermediate portion 15. These holes are called bone grafts 16, and are used to fill the holes with materials having high bone affinity such as the patient's autologous bone and artificial bone.
- An engaging portion 20 that is engaged with a guide device described later is formed on the ventral side surface 17 of FIG.
- the number of these holes is not limited to two, and in the present invention, these holes are not essential and may be interbody spacers without holes.
- FIG. 4 shows a plan view, an inner side view, a lateral side view, and a ventral side view of the interbody spacer 10 of Example 1.
- 4 (A) is a plan view
- FIG. 4 (B) is an inner side view
- FIG. 4 (C) is an outer view
- FIG. 4 (D) is a ventral side view.
- H 1 is the height of the ventral side surface 17
- H 2 is the height of the dorsal side surface 18.
- FIG. 5 shows a perspective view of the guide device 30 of the second embodiment
- FIG. 6 shows a plan view of the guide device 30 of the second embodiment
- the guide instrument 30 is formed with a guide rail portion 31 that engages with the engaging portion 20 of the interbody spacer 10 and a grip portion 32 that is gripped by the operator.
- FIG. 6 shows a state in which the engaging portion 20 formed on the ventral side surface 17 of the interbody spacer 10 and the guide rail portion 31 are engaged.
- W in FIG. 5 is the width of the guide rail portion 31.
- FIG. 7 shows a perspective view of the guide device 30 of the third embodiment
- FIG. 8 shows a plan view of the guide device 30 of the third embodiment.
- the guide instrument 30 is formed with a guide rail portion 31 that engages with the engaging portion 20 of the interbody spacer 10 and a grip portion 32 that is gripped by the operator.
- FIG. 8 shows a state in which the engaging portion 20 formed on the dorsal side surface 18 of the interbody spacer 10 and the guide rail portion 31 are engaged.
- W in FIG. 7 is the width of the guide rail portion 31.
- FIG. 9 schematically shows a step in which two interbody spacers 10 are installed between the vertebral bodies using the guide instrument 30 of the second embodiment.
- the guide device 30 is installed at a predetermined position while avoiding the nerve 3.
- the engaging portion 20 of the ventral side surface 17 on the lateral surface 11 side of the interbody spacer 10 is engaged with the guide rail portion 31.
- a pusher (not shown) is used to push the inner side surface 12 side to insert the interbody spacer 10 along the guide rail portion 31, and in FIG. 9D, one piece.
- the interbody spacer 10 of the eye is placed in place.
- FIG. 9E the guide instrument 30 is pulled out, and a new short guide instrument 30 of the guide rail portion 31 is set at a predetermined position between the vertebral bodies.
- FIG. 9F the engaging portion 20 of the ventral side surface 17 on the inner surface 12 side of the interbody spacer 10 is engaged with the guide rail portion 31.
- a pusher (not shown) is used to push the lateral surface 11 side to insert the interbody spacer 10 along the guide rail portion 31, and in FIG. 9 (H), two spacers are inserted.
- the interbody spacer 10 of the eye is placed at a predetermined position, and the guide device 30 is pulled out.
- the guide rail portion 31 of Example 2 is placed against the annulus fibrosus of the intervertebral disc on the ventral side between the vertebral bodies to form the ventral wall, whereby the interbody spacer penetrates the annulus fibrosus and the vertebral body. It is possible to prevent the abdomen from falling out from the interval.
- FIG. 10 schematically shows a step of installing two interbody spacers 10 between vertebral bodies using the guide instrument 30 of Example 3.
- the guide device 30 of the third embodiment is different from the guide device 30 of the second embodiment so as to engage with the engaging portion 20 formed on the dorsal side surface 18 of the interbody spacer 10. By doing so, the nerve 3 is protected by the guide device 30.
- FIG. 11 schematically shows a specific example of the engagement state between the interbody spacer 10 and the guide rail portion 31 of the guide device 30.
- the cross section of the guide rail portion 31 has a T-shaped convex shape
- the cross section of the engaging portion 20 of the interbody spacer 10 has a T-shaped concave shape.
- FIG. 11 (A-2) the opposite is true.
- the engaging structure is a groove
- the engaging structure in FIGS. 11 (C-1) and 11 (C-2), is a ball. It is a socket relationship.
- These engagements have their own characteristics, and the T-shape and the grooved shape have the characteristics that the processing cost is advantageous and that they can be held securely.
- the ball-socket shape The slidability is improved.
- FIG. 11 (D) is a modification of FIG. 11 (A-1), in which the width of the guide rail portion 31 is extremely small compared to the height of the ventral and / or dorsal sides of the interbody spacer. Therefore, the interbody spacer 10 can be more easily and accurately installed in a predetermined position even in a narrow area between the vertebral bodies.
- the system according to the present invention is a simple system, and by using this system, the interbody spacer can be easily and accurately installed at a predetermined position between the vertebral bodies even in a narrow surgical field.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Transplantation (AREA)
- Neurology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
前記係合部及び前記ガイドレール部の横断面のいずれか一方は、凹形状で、同他方は、前記凹形状に対応する凸形状であり、前記凹形状は、前記凸形状と対向する同凹形状の開口幅よりも広い最大幅の部分を有しているシステムである。
1A:頭側椎体
1B:尾側椎体
2:椎間板
3:神経
10:椎体間スペーサー
11:外側面
12:内側面
13:上面
14:下面
15:中間部
16:骨移植部
17:腹側面
18:背側面
20:係合部
30:ガイド器具
31:ガイドレール部
32:把持部
Claims (6)
- 脊椎疾患を治療するためのシステムであって、当該システムは、
椎体と椎体との間に挿入して使用される水平方向に湾曲した椎体間スペーサーであって、
各前記椎体と当接する一対の当接面を備え、当該一対の当接面を腹側で接続し、平面視凸状の腹側の側面である腹側面と、当該一対の当接面を背側で接続し、平面視凹状の背側の側面である背側面とを備え、
前記腹側面及び/または背側面には、前記湾曲した方向に沿った係合部を有する椎体間スペーサーと、
前記椎体間スペーサーを前記椎体と椎体との間の所定位置に案内するガイド器具であって、
遠位端側に前記腹側面または背側面のいずれか一つの係合部と嵌め合わされるガイドレール部を有し、
当該ガイドレール部の平面視の曲率半径は、前記腹側面または背側面の平面視の曲率半径と実質同一であるガイド器具と、を有するシステムであり、
前記係合部及び前記ガイドレール部の横断面のいずれか一方は、凹形状で、同他方は、前記凹形状に対応する凸形状であり、前記凹形状は、前記凸形状と対向する同凹形状の開口幅よりも広い最大幅の部分を有しているシステム。 - 前記ガイドレール部の横幅が、前記椎体間スペーサーの前記腹側面及び/または背側面の高さ以下である請求項1に記載のシステム。
- 前記係合部の横断面は、T字状の凹形状であり、前記ガイドレール部の横断面は、T字状の凸形状であることを特徴とする請求項1または2に記載のシステム。
- 前記係合部の横断面は、T字状の凸形状であり、前記ガイドレール部の横断面は、T字状の凹形状であることを特徴とする請求項1または2に記載のシステム。
- 請求項1~4のいずれか1項に記載の椎体間スペーサー。
- 請求項1~4のいずれか1項に記載のガイド器具。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20857064.8A EP3939547B1 (en) | 2019-08-30 | 2020-05-19 | System for guiding interbody spacer between vertebral bodies |
CN202080034853.0A CN113811267A (zh) | 2019-08-30 | 2020-05-19 | 在椎体间引导椎体间间隔件的系统 |
GB2115388.7A GB2598230B (en) | 2019-08-30 | 2020-05-19 | System for guiding interbody spacer between vertebral bodies |
ES20857064T ES2968169T3 (es) | 2019-08-30 | 2020-05-19 | Sistema de guiado de un espaciador intersomático entre cuerpos vertebrales |
CA3137178A CA3137178C (en) | 2019-08-30 | 2020-05-19 | System for guiding interbody spacer between vertebral bodies |
US17/610,834 US20220249253A1 (en) | 2019-08-30 | 2020-05-19 | System for guiding interbody spacer between vertebral bodies |
US18/520,868 US20240091028A1 (en) | 2019-08-30 | 2023-11-28 | System and method for guiding interbody spacer between vertebral bodies |
Applications Claiming Priority (2)
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JP2019157595A JP6700511B1 (ja) | 2019-08-30 | 2019-08-30 | 椎体間スペーサーを椎体間にガイドするシステム |
JP2019-157595 | 2019-08-30 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US17/610,834 A-371-Of-International US20220249253A1 (en) | 2019-08-30 | 2020-05-19 | System for guiding interbody spacer between vertebral bodies |
US18/520,868 Continuation US20240091028A1 (en) | 2019-08-30 | 2023-11-28 | System and method for guiding interbody spacer between vertebral bodies |
Publications (1)
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PCT/JP2020/019786 WO2021038982A1 (ja) | 2019-08-30 | 2020-05-19 | 椎体間スペーサーを椎体間にガイドするシステム |
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US (2) | US20220249253A1 (ja) |
EP (1) | EP3939547B1 (ja) |
JP (1) | JP6700511B1 (ja) |
CN (1) | CN113811267A (ja) |
CA (1) | CA3137178C (ja) |
ES (1) | ES2968169T3 (ja) |
GB (1) | GB2598230B (ja) |
WO (1) | WO2021038982A1 (ja) |
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EP3939547A1 (en) | 2022-01-19 |
JP6700511B1 (ja) | 2020-05-27 |
CA3137178C (en) | 2022-07-19 |
US20240091028A1 (en) | 2024-03-21 |
JP2021035407A (ja) | 2021-03-04 |
GB2598230A (en) | 2022-02-23 |
GB2598230B (en) | 2023-06-07 |
EP3939547A4 (en) | 2022-12-28 |
US20220249253A1 (en) | 2022-08-11 |
ES2968169T3 (es) | 2024-05-08 |
EP3939547B1 (en) | 2023-11-08 |
CA3137178A1 (en) | 2021-03-04 |
CN113811267A (zh) | 2021-12-17 |
GB202115388D0 (en) | 2021-12-08 |
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