EP3355835A1 - Vertebral column implant and tools for said implant - Google Patents
Vertebral column implant and tools for said implantInfo
- Publication number
- EP3355835A1 EP3355835A1 EP16793734.1A EP16793734A EP3355835A1 EP 3355835 A1 EP3355835 A1 EP 3355835A1 EP 16793734 A EP16793734 A EP 16793734A EP 3355835 A1 EP3355835 A1 EP 3355835A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- implant
- tool
- contour
- spine
- vertebrae
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007943 implant Substances 0.000 title claims abstract description 133
- 102100020760 Ferritin heavy chain Human genes 0.000 claims description 11
- 101001002987 Homo sapiens Ferritin heavy chain Proteins 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000000605 extraction Methods 0.000 description 29
- 238000002360 preparation method Methods 0.000 description 14
- 238000012937 correction Methods 0.000 description 13
- 230000008859 change Effects 0.000 description 4
- 241000234295 Musa Species 0.000 description 3
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 241000985630 Lota lota Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
- 210000002517 zygapophyseal joint Anatomy 0.000 description 1
Classifications
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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
-
- 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
- A61F2/4455—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
-
- 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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- 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
- 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
- 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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- 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
- A61F2/4455—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
- A61F2/447—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 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
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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
- 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
- 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
- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30774—Apertures or holes, e.g. of circular cross section internally-threaded
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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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30777—Oblong apertures
-
- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30784—Plurality of holes
- A61F2002/30785—Plurality of holes parallel
-
- 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
-
- 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
- A61F2002/4619—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 for extraction
-
- 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
- A61F2002/4629—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 connected to the endoprosthesis or implant via a threaded connection
Definitions
- the invention relates to spinal implants, as have become known, in particular, from the invention described in DE 10 2013 005 692 A1 for insertion by means of the tools created for this purpose between two vertebrae of a spinal column.
- the implant is designed as an elongate body with a straight axis, with at least one of its end regions and within the body and on the said axis a first contour, such as a thread, provided as an attack surface for rigid, but releasable connection with a first tool is for driving the implant between two vertebrae in a position corresponding to the PLIF, after previously, as in the PLIF method, but only on one side of the spinous process, created a relatively small dorsal access in the skin and partially the facet joint of the corresponding vertebral body was prepared.
- a first contour such as a thread
- the implant further has, also within its elongated body and also lying on said straight axis, seen from the rear, in front of the first contour - ie before the threaded portion - a second, in particular convex-hollow, concave, preferably kugelkalottenartige contour asadosflä - Che for a second tool, suitable for forming a temporarily articulated connection with this, for further displacement of the implant between the two vertebrae in a the TLIF process at least approximately corresponding or even beyond it.
- the implant also has at its rear portion a third attack contour, for placing the tine or fork-shaped distal end portion of a third tool, a "Einellers" to the implant, if this appears expedient to the surgeon, in the whirling room even further to twist or to relocate, as was done with the second tool or was possible.
- the first tool - also referred to as "advertiser” - consists of two parts, a straight hollow rod with forked or Zinkenfömig trained distal end and a knob with gags on its proximal end and a rod-shaped inner part received in the hollow rod, also Inserter rod or The inner rod has at the distal end a threaded portion which projects opposite to the hollow rod and onto which the cage is screwed.
- the proximal end contour of the knob serves as an abutment area for a button or rotary handle, which is fixed to the proximal end portion of the inner rod.
- the first tool is removed from the implant by loosening the screw connection.
- the second tool also called “ball tool”
- the position of the implant can be advanced by further pivoting, twisting, or further driving in anteriorly, to be corrected.
- a further tool called a "follower”, which in turn is inserted through the existing preparation and placed on the outer area of the stern with its fork-shaped area at the distal end Relocation of the implant
- the hollow rod of the inserter tool can be used in an advantageous manner.
- the object of the present invention was to provide or optimize implants and / or tools in order to correct the position, including the angular position, of an inserted implant, as well as a partial retraction of an implant driven too far, as it were a "backward correction".
- implants of the type initially mentioned but also of others, in which - during or after the insertion - intended or not - a rotation, torsion, pivoting, displacement or the like of the implant took place between two adjacent vertebrae an extraction is possible, for example if the optimal implant was not used for the reasons mentioned above.
- both a first contour, such as a thread, and a second, spherical contour, such as a spherical cap, are provided at least approximately on the practically straight axis of the implant viewed from the threaded area in the direction of the inlet opening, the initially expanding calotte-shaped area then merges into a further closing area which ends in the tool inlet opening, and the contours of these re-closing areas, together with a corresponding tool , in particular the ball of a ball tool - or a tool that is at least approximately the same effective or equivalent - are matched to one another in such a way that the tool and the implant shaped area is introduced through the inlet opening - so to speak interlocked, so that when applying a directed in the longitudinal direction of the preparation tensile force on the ball tool at least a backward correction, such as a change in the angular position of the implant, can take place.
- the cavity of the implant has a larger diameter
- the backward correction achieved in the above manner may be satisfactory.
- extraction may be accomplished in some cases by further extraction, ie application of a tensile force, possibly superimposed with an additional force component by which the ball is forced into the narrowing regions of the dome.
- a tensile force possibly superimposed with an additional force component by which the ball is forced into the narrowing regions of the dome.
- the implant is too tightly clamped, yet it can be created by changing the angular position thereof a situation that serves as a preparation for performing an extraction, namely by the introduction of a threaded tool at its distal end, which may also be the above-described inserter rod or a tool similar to this, can first be made by the existing preparation and then screwing the threaded portion into the threaded hole of the implant, after which this can be pulled out or-beaten.
- Finding the threaded hole and screwing in such a tool is greatly facilitated if, according to an additional and independent inventive idea, in the implant entrance of the internal thread Einfädelschräge, z. B. a funnel-like extension and / or a bevel of the thread is provided at the distal end of the rod-shaped tool.
- a funnel-like extension and / or a bevel of the thread is provided at the distal end of the rod-shaped tool.
- This idea of the invention independently covers any implants which have an internal thread designed in this way, such an internal thread for introducing the implant by means of a corresponding tool is already provided, or else such an internal thread has been specially introduced for the purpose of extraction, as well as the correspondingly executed Tools for an extraction.
- the effectiveness or the effectiveness of such a backward displacement or even an extraction can be further improved or facilitated if according to a further inventive concept between the correction / extraction tool and the implant, the adhesion-increasing means are provided.
- the adhesion-increasing means are provided in the region of the dome-shaped contour and / or on the insertable into the implant areas of the ball tool, ie z. B. the ball thereof.
- Such friction-increasing means may be formed by a roughening applied to the ball and / or the inner contour of the calotte, but at least to areas with which they come into contact during the displacement of the implant.
- ball and / or dome can also with a rough or be provided hard coating, which is characterized by a coating z. B. can achieve with diamond chips.
- another mineral coating or a titanium plasma coating can also be advantageous, the latter being able to be applied by a plasma spray or deposition method. It may also be appropriate to make the rough or hard only one of the two parts and to use for the other generally much softer material.
- a positive connection between the implant and z. B. ball tool can also be made very effective by means of a ball tool or a tool at least similar to this, by a contour, such as a groove is provided on the ball, with the mating contours on the implant, as the inwardly oriented boundary areas the entrance opening, engage.
- the latter can also be designed claw-like or hook-like.
- the invention is also intended to enable the relocation and / or the extraction of other implants, for example, B. of those in which already a first and a second contour are already provided, of which the first may be an internal thread and the second a spherical cap and having a curved axis and a convex outer contour, ie of so-called banana cages, such as z.
- B. those in which already a first and a second contour are already provided, of which the first may be an internal thread and the second a spherical cap and having a curved axis and a convex outer contour, ie of so-called banana cages, such as z.
- banana cages such as z.
- Lotte of the implant is used, by applying impact pulses to the tool, the implant slide with its convex curved surface either by itself along the concave surface of the ring apophysis and twist, or the rotation is controlled from the outside, z.
- a correction of a too advanced position such as the angular position, take place or an extraction of the implant can be made by the dome, seen in the direction of the inlet, merges into again narrowing areas, in the case of a spherical cap this So more than a hemisphere includes.
- a tool which is at least similar to a ball tool described, so rod-shaped, at the proximal end has a handle, and wherein the distally disposed ball relative to the handle is offset, that is fastened on the bent end region of the rod.
- the largest diameter of the dome is also larger than that of the ball of the tool and the latter equal to or smaller than the inlet diameter.
- FIGS. 1-8a Show Figures 1 - 4 different positions of the position correction and extraction of inventively designed implants of the type mentioned, and the tools required for this purpose; 1a shows an enlarged view of the detail 1a of FIG. 1, FIGS. 5 and 6 show advantageous developments of implants of the above type, and associated tools, FIGS. 7, 8 and 8a show the invention with implants of another type, and a related tool.
- FIG. 1 shows the lower vertebra 1 of two adjacent vertebrae of a spinal column, in the adjacent disc space 2 of which an implant 3 with a straight axis A designed and inserted according to DE 10 2013 005 692 A1 is located.
- This has at its rear end 4 an inlet opening 5 for tools, then a kugelkalottenfö- shaped cavity 6 and behind an internal thread 7.
- a recess 9 is provided for receiving bone material and the beginning of Thread 7 a funnel-shaped or conical inlet bevel 10th
- the spherical cavity 6 extending from the threading slope initially has a widening section 6a and subsequently a region 6b which continues to close again.
- the cavity 6 thus closes further than in a hemisphere, that is beyond the equator.
- the implant has outside at its end portion 4 a concernedsbreich 4a for a "impactor".
- the implant 3 is located after driving in a in the opinion of the surgeon inadvertently too far pivoted position I of FIG. 1 and should instead be in a less oblique position.
- the tool 11 used for the correction of this position may be the "ball tool” used to drive the implant, it has a rod-shaped region IIa, at its proximal end region a handle (not shown here) and its distal end The distal end region is here formed by two bent regions 11c and 11d
- the rod-shaped region is a flattened round rod in the case of all, ie on the side of the rod-shaped region IIa facing away from the sphere IIb.
- the tool 11 is, with the spherical portion IIb preceded, first introduced through the preparations 12 in the tissue and 13 on the vertebral body and finally the ball IIb through the inlet opening 5 into the cavity 6 of the Implant 3 used. In some cases it may be expedient to provide markings on the sphere Ib and the inlet opening 5.
- the implant 3 By applying a tensile force in the longitudinal direction of the rod-shaped region IIa, the implant 3 can now be changed or set back at least in its oblique position until it reaches a position which appears favorable for the surgeon and, as shown in FIG. 2, as position II of the implant 3 , In particular, in connection with FIG. 1, it can be seen that a force component is generated by the cranked regions 11c, 11d, which forces the ball IIb into the cavity, thus leaving the ball and the region 6b extending over it in contact.
- the tool 11 may be the ball tool already used when driving or another, suitably trained. It can also be provided a set of such tools that are designed differently, for. B. have differently shaped offsets.
- the implant 3 is shown in a position III in which it is extracted by means of the tool 11 and is located within the preparation 13 of the vertebra 1, provided that ideal conditions exist. Extraction in this way can be significantly improved, even in the presence of unfavorable conditions, by providing at least friction-enhancing, or a mold closure-yielding means on the implant and / or tool and the effective in the implanted state, as described below by way of example is.
- FIG. 4 is based on a situation in which the implant 3 can not be extracted by means of a ball tool or similar tool, for example because it is too tightly clamped between the vertebrae. However, it is z. B. by means of a tool 11 has been erected so far into a position IV, that since ⁇ the introduction of a attached to a rod-shaped tool 14 threaded portion 14a in the threaded hole 7 of the implant 3 is possible.
- the conical configuration 14b of the distal end region of the tool at the beginning of the thread and / or the region 10 as threading bevel of the threaded bore 7 enables or facilitates the threading or engagement of the threads 7 and 14a, even if their axes initially do not match. It is at least initiated by these Einfädelschrägen alignment thereof, which is further improved by threaded threads at least partially extend over the conical portions 7 and / or 14a.
- Embodiments are shown in FIGS. 5 and 6, in which the adherence of the implant and the tool during the position correction or the extraction is improved.
- a possibility for increasing the friction is shown in FIG.
- the areas 6a and 6b only the narrowing portion 6b of the cavity 6 of the implant 3 with a coating 15 z.
- diamond splinters, as well as the ball 16a of the provided with a bend 16b tool 16 is partially equipped with such a coating 16c.
- FIG. 6 shows an embodiment in which a temporary positive connection between an implant 17 and an extraction tool 18 can be produced.
- the dome-like flared portion 17c extending from the threading slope 17a for the thread 17b then continues into one again narrowing area 17d, which is determined by an inwardly facing edge region 17e of the implant.
- This edge can be circumferential or, as shown in the lower area, have interruptions 17f, so that individual claws or claws 17g remain and thus the inlet opening 17h is formed.
- the tool 18 is also similar to a ball tool, has a substantially straight bar 18a with a handle, not shown, and a bent portion 18b with respect to the rod and at the distal end a spherical shaped here area 18c with a notch or groove 18d.
- the tool 18 after it has been inserted through the inlet 17h, inserted into the edge 17e or the teeth or claws 17g, thus forming a positive connection and a displacement of the implant in the sense of a correction or removal particularly safe and effective.
- the introduction of a thread 17b and an insertion bevel 17a may be dispensable.
- the banana cage 19 shown in FIG. 7 with curved inner and outer contours 19a and 19b, recess 19c and internal thread 19d is provided with an inlet cone 19e at the beginning of the thread and the adjoining spherical space 19f next to that which initially widens Section 19g thereafter additionally a further closing section 19h, which ends in the inlet opening 19i for the ball 20a of the tool 20.
- the implant 19, as well as those described in the preceding figures, can be corrected in position, prepared for extraction, extracted and also equipped according to FIGS. 5 and 6. It is assumed that the implant 21, which is shown only partially in FIG. 8 and is to be introduced by the PLIF or TLIF method, should initially only be suitable for being extracted from a conventional PLIF or TLIF layer. This may be possible by means of the thread 21a, which is present anyway in such implants, but may at best be deburred at the beginning of the thread. However, locating and threading a threaded rod is made considerably easier if, at the beginning, the threaded hole is a Einfädelschräge 21b and / or a Einfädelschräge is provided on the threaded rod.
- the space described above throughout as a spherical cap-shaped cavity can define areas of a sphere at least approximately geometrically exactly, as can the ball of the ball tool described.
- This designation is exemplary, so that the invention also detects implants with other concave cavity shapes and tools with differently shaped geometrically exactly spherical convex counter-contour - or vice versa - with which equal or equivalent functions and effects can be achieved, namely a correction of the situation, in particular a back displacement of an implant or even an extraction of such, so for example, a roller-shaped configuration of the end portion of a ball tool or ball tool corresponding tool and designed with corresponding counter-contours implants.
- the further closing areas of the cavity can, as shown, for. B. be angled areas, so that here also a deviation from the ideal shape of a ball can be given.
- the invention is not limited to the illustrated and described embodiments. It encompasses all embodiments, methods and working steps that make use of the knowledge that an implant inserted into the spinal space has a cavity at one of its end regions, which has a region which extends further in the direction of the end region and which ends in a tool inlet opening, in the swirl space either correct in its position or remove it or spend in an extracting tool accessible position by a ball tool described or this at least approximately equivalent tool through the preparation, through the inlet opening implant into the cavity until the re-closing areas the cavity engages behind the ball and a tensile force is exerted in the longitudinal direction of the preparation.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Neurology (AREA)
- Transplantation (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
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102015012741 | 2015-10-01 | ||
PCT/DE2016/000355 WO2017054793A1 (en) | 2015-10-01 | 2016-09-24 | Vertebral column implant and tools for said implant |
Publications (1)
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EP3355835A1 true EP3355835A1 (en) | 2018-08-08 |
Family
ID=57256011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16793734.1A Pending EP3355835A1 (en) | 2015-10-01 | 2016-09-24 | Vertebral column implant and tools for said implant |
Country Status (3)
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EP (1) | EP3355835A1 (en) |
DE (2) | DE102016011585A1 (en) |
WO (1) | WO2017054793A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5895428A (en) * | 1996-11-01 | 1999-04-20 | Berry; Don | Load bearing spinal joint implant |
WO2006034436A2 (en) * | 2004-09-21 | 2006-03-30 | Stout Medical Group, L.P. | Expandable support device and method of use |
US8556976B2 (en) * | 2007-03-01 | 2013-10-15 | The Center For Orthopedic Research And Education, Inc. | Spinal interbody spacer device |
FR2948277B1 (en) | 2009-07-27 | 2012-11-16 | Medicrea International | ASSEMBLY COMPRISING AN INTERVERTEBRAL IMPLANT FOR IMMOBILIZING A VERTEBRA IN RELATION TO ANOTHER AND A POSITION INSTRUMENT OF THIS IMPLANT |
DE102012007032A1 (en) | 2012-04-05 | 2013-10-10 | Spine Center Baden GmbH | Spinal implant, tools for inserting implants between two vertebral bodies of a spine and surgical kit |
US20140172103A1 (en) * | 2012-12-17 | 2014-06-19 | Michael J. O'Neil | Polyaxial Intervertebral Cage |
WO2015048673A1 (en) * | 2013-09-27 | 2015-04-02 | Amedica Corporation | Spinal implants and related instruments and methods |
-
2016
- 2016-09-24 WO PCT/DE2016/000355 patent/WO2017054793A1/en active Application Filing
- 2016-09-24 DE DE102016011585.8A patent/DE102016011585A1/en not_active Withdrawn
- 2016-09-24 EP EP16793734.1A patent/EP3355835A1/en active Pending
- 2016-09-24 DE DE112016004448.8T patent/DE112016004448A5/en not_active Withdrawn
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WO2017054793A1 (en) | 2017-04-06 |
DE102016011585A1 (en) | 2017-04-06 |
DE112016004448A5 (en) | 2018-08-09 |
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