WO2008102021A1 - Perfeccionamientos en una prótesis en disco intervertebral - Google Patents
Perfeccionamientos en una prótesis en disco intervertebral Download PDFInfo
- Publication number
- WO2008102021A1 WO2008102021A1 PCT/ES2007/000098 ES2007000098W WO2008102021A1 WO 2008102021 A1 WO2008102021 A1 WO 2008102021A1 ES 2007000098 W ES2007000098 W ES 2007000098W WO 2008102021 A1 WO2008102021 A1 WO 2008102021A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact
- bases
- prosthesis
- projections
- faces
- Prior art date
Links
Classifications
-
- 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
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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
- A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
-
- 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
-
- 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
Definitions
- the invention refers to modifications introduced into the body of an intervertebral disc prosthesis to be placed inside the annulus fibrosus between the intervertebral endplates of a patient's spine, allowing movement of said endplates.
- the purpose of this intervertebral disc prosthesis is to improve its behavior in its work situation when it is implanted to replace the nucleus of the lumbar disc, in cases in which the chronic pain produced as a consequence of certain lumbar pain pathologies cannot be solved. through rest, pharmacological treatment, anti-inflammatories and subsequent physiotherapy.
- An intervertebral disc prosthesis is known, described in Spanish patent No. 2237323 of the same applicant, which comprises at least one hollow expandable intersomatic element of essentially prismatic configuration made of a shape memory plastic material, which has respective opposite surfaces. of contact with the aforementioned intervertebral plates adapted for their adherence by osseointegration to them, each element of the prosthesis presenting a reduced size to allow it to pass through the interlaminar space and enter the intervertebral space.
- contact elements inserted into the respective cavities formed by opposite support surfaces of said hollow element are arranged on said opposite contact surfaces.
- the object of the present invention is to improve the implementation and results of the intervertebral disc prosthesis on the pathologies detected in the intervertebral discs, modifying its design and configuration.
- the present invention aims to solve these drawbacks, proposing an improved intervertebral disc prosthesis formed by a hollow expandable intersomatic element of essentially prismatic configuration made of a plastic material with shape memory, which presents opposite flat contact surfaces with said intervertebral plates. adapted for their adherence by fibrous integration to said endplates, said opposite contact surfaces being affected by a plurality of longitudinal holes interconnected with each other but not through which allow secondary fixation by integration of fibrous tissues to the vertebral endplates without the need to scrape them.
- these holes will be arranged aligned both in the vertical direction and in the horizontal direction and symmetrically on both contact surfaces.
- a plurality of through-holes that go from one of the lateral faces to the opposite lateral face, these transverse holes arranged in a column along said lateral half-faces, the longitudinal holes belonging to the same row with the transversal through hole corresponding to the same height.
- Another improvement incorporated in the intervertebral disc prosthesis is the provision of spikes in the form of projections on the respective opposite contact surfaces of the prosthesis, which allow good primary fixation to the vertebral endplates.
- This improvement prevents the prosthesis from receding once it is located inside the lumbar discs, helping the prosthesis, once placed in the precise coordinates, to remain there until the tissues grow and prevent its migration.
- these spikes will have a truncated-cylindrical configuration with an angular profile ending in a point.
- two separate spikes will be arranged at one end of the contact surfaces and another spike at the opposite end of the contact surfaces, all the spikes of the same contact surface being arranged in the same position and the spikes of the contact surface opposite contact in a symmetrical position with respect to the transversal axis of the prosthesis.
- Figure No. 1 is a front elevational view of the intersomatic element (10).
- Figure No. 2 is a side elevational view of the intersomatic element (10) of its body (18), in which a protruding portion (17) emerges from its opposite lateral faces (19-20).
- Figure 3 is a perspective view of the intersomatic element (10) object of the invention.
- Figure 4 is a top plan view of the intersomatic element (10) object of the invention.
- Figure 5 is a cross-sectional perspective of the body (18) of the intersomatic element (10) object of the invention.
- Figure 6 is a front elevational view of a longitudinal section of the body (18) of the intersomatic element (10) object of the invention.
- the intersomatic element (10) has a substantially prismatic body (18) with respective flat contact faces (13-13') and respective minor faces ( 21-21') curves, protruding from the opposite side faces (19-20) respective protruding portions (17-17'). These protruding portions (17-17') are affected by a central through cavity (16) with a sinuous section, which provides the prosthesis (10) with a hollow constitution.
- the body (18) of the intersomatic element (10) has an increased cross section in its thicknesses di (upper thickness) and d2 (intermediate thickness), that is, said thicknesses have increased to give greater rigidity to the whole, and greater resistance to compression.
- the cross section that can be seen in Figure 1 shows us a configuration of said section in a substantially rectangular shape with smaller semi-cylindrical curved bases (21-21') with a minimum thickness of between 1 and 2 mm. , and larger contact bases (13-13') with a flat outer surface with a thickness that widens in its central part up to a maximum thickness d2 between 3 and 5 mm.
- the contact faces (13-13') incorporate projections (14) that are arranged perpendicular to said contact surfaces (13-13') and have a pointed profile. preferably in a "V" shape.
- a set of longitudinal holes (15) are incorporated in the contact faces (13-13') arranged horizontally aligned and in several rows, and respective transverse holes (23) through holes on the opposite side faces (19-20) arranged vertically aligned and at the same height as the rows of longitudinal holes
- Each transverse hole (23) is interconnected with the corresponding row of longitudinal holes (15), that is, the one at the same height, in order to favor the integration of the intersomatic element (10) to the vertebral plates (18). ), see figure 6.
- the arrangement of longitudinal holes (15) has been projected according to five rows and six columns of holes (15), see figure 2; and three projections (14) have been arranged, two at one end of the contact surfaces (13-13') and another at the opposite end of said surfaces (13-13'), forming a substantially triangular configuration.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/ES2007/000098 WO2008102021A1 (es) | 2007-02-22 | 2007-02-22 | Perfeccionamientos en una prótesis en disco intervertebral |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/ES2007/000098 WO2008102021A1 (es) | 2007-02-22 | 2007-02-22 | Perfeccionamientos en una prótesis en disco intervertebral |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008102021A1 true WO2008102021A1 (es) | 2008-08-28 |
Family
ID=39709670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2007/000098 WO2008102021A1 (es) | 2007-02-22 | 2007-02-22 | Perfeccionamientos en una prótesis en disco intervertebral |
Country Status (1)
Country | Link |
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WO (1) | WO2008102021A1 (es) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999004733A1 (en) * | 1997-07-24 | 1999-02-04 | Techsys Medical, L.L.C. | An interbody fusion device having partial circular section cross-sectional segments |
US20020103540A1 (en) * | 1999-01-16 | 2002-08-01 | Derek Redvers Cooper | Spinal fusion implant |
ES2237323A1 (es) * | 2003-12-30 | 2005-07-16 | Vortek Gestora De Patrimonios, S.R.L. | Protesis de disco intervertebral. |
WO2005102226A1 (de) * | 2004-04-26 | 2005-11-03 | Synthes Gmbh | Zwischenwirbelprothese oder bandscheibenprothese |
FR2870449A1 (fr) * | 2004-05-19 | 2005-11-25 | Medicrea Sa | Implant intervertebral |
-
2007
- 2007-02-22 WO PCT/ES2007/000098 patent/WO2008102021A1/es active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999004733A1 (en) * | 1997-07-24 | 1999-02-04 | Techsys Medical, L.L.C. | An interbody fusion device having partial circular section cross-sectional segments |
US20020103540A1 (en) * | 1999-01-16 | 2002-08-01 | Derek Redvers Cooper | Spinal fusion implant |
ES2237323A1 (es) * | 2003-12-30 | 2005-07-16 | Vortek Gestora De Patrimonios, S.R.L. | Protesis de disco intervertebral. |
WO2005102226A1 (de) * | 2004-04-26 | 2005-11-03 | Synthes Gmbh | Zwischenwirbelprothese oder bandscheibenprothese |
FR2870449A1 (fr) * | 2004-05-19 | 2005-11-25 | Medicrea Sa | Implant intervertebral |
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