WO2003041618A2 - Prothese d'articulation vertebrale posterieure - Google Patents
Prothese d'articulation vertebrale posterieure Download PDFInfo
- Publication number
- WO2003041618A2 WO2003041618A2 PCT/FR2002/003911 FR0203911W WO03041618A2 WO 2003041618 A2 WO2003041618 A2 WO 2003041618A2 FR 0203911 W FR0203911 W FR 0203911W WO 03041618 A2 WO03041618 A2 WO 03041618A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- prosthesis
- posterior
- smooth
- faces
- articular process
- 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
- A61F2/4405—Joints for the spine, e.g. vertebrae, spinal discs for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes
-
- 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
-
- 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
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
-
- 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
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30879—Ribs
Definitions
- the present invention relates to a posterior vertebral joint prosthesis.
- medical therapies are no longer sufficient to relieve them, in particular when these joints are very deformed by osteoarthritis or an old trauma, it becomes desirable to replace their articular surfaces with prostheses; the advantage of these prostheses is to preserve the functions and mobility of the spine, and to avoid blockage (arthrodesis) of these joints.
- each of these devices comprises a support comprising a convex face conforming to and coming to bear in contact with a portion of the concave surface of the posterior arch of a vertebra, on at least one side of the spinous process; this support is fixed to the vertebra by a pedicle screw, and / or to the spinous and transverse processes by strapping means such as a flange, a collar, a hook; this device further comprises a blade forming a half articular prosthesis which has two opposite faces: a first face, called articular or sliding, is in contact with a similar face of an adjacent vertebra with a minimum of friction; this first face is covered with a biocompatible material with a high slip rate, such as stainless steel or titanium in particular; a second face opposite the first face of the blade, called the bone face, is porous, dotted with spikes, covered or not with
- An object of the invention is to provide posterior vertebral joint prostheses which are improved and which remedy, at least in part, the drawbacks of prostheses of this type.
- the invention consists in proposing a device comprising, for the left posterior vertebral joint or for the right posterior vertebral joint, a first prosthesis partially replacing the anterior articular process which comprises a first surface d sliding support, as well as a second prosthesis for total replacement of the posterior articular process, which comprises a second sliding support surface having at least a portion of shape similar or identical to the shape of at least a portion of said first sliding bearing surface of said first prosthesis.
- the implantation of the first partial replacement prosthesis of the anterior articular process requires a simple prior abrasion of the articular surface (or facet) of the anterior process, while the implantation of the second total replacement prosthesis of the posterior articular process is performed after substantially complete removal of the posterior process.
- the invention consists in proposing a device for replacing the posterior vertebral articular surfaces which comprises, for the left joint and for the right joint, a first prosthesis of the anterior articular process comprising a first bearing surface smooth, as well as a second posterior articular process prosthesis comprising a second smooth bearing surface whose shape is complementary to that of said first surface of the first prosthesis, so as to facilitate its sliding on the first surface and to facilitate relative antero-posterior (or sagittal) rotation movement two adjacent vertebrae fitted with these prostheses; this allows the vertebrae equipped with the prostheses according to the invention to retain significant mobility.
- the invention consists in proposing posterior vertebral articulation prostheses having smooth sliding support surfaces which substantially follow the shape of a dihedral:
- the first anterior articular process prosthesis has a support surface sliding in the form of a concave dihedral, the faces of which preferably form a first angle situated in a range from 90 ° to 160 °, while the second posterior articular process prosthesis has a sliding support surface in the form of a convex dihedral, the faces form a second angle whose value is equal to or close to the 360 ° complement of the value of said first angle.
- the value of the opening angle of the dihedral sliding bearing surfaces is preferably adapted to the position of the vertebra along the spine: for the L5- S1 (lumbosacral) joint, the value of the angle of the anterior joint prosthesis is preferably close to 90 ° to 160 ° and the value of the angle of the posterior joint prosthesis is respectively close to 270 ° to 200 °, while for the joint L4-L5, the angle of the anterior prosthesis is preferably close to 90 ° to 150 ° and the angle of the posterior prosthesis is respectively close to 270 ° to 210 °.
- the invention consists in proposing posterior vertebral articulation prostheses having smooth sliding support surfaces having an anteroposterior curvature: said first anterior prosthesis has, (in medial view), a curved sliding surface open towards the rear and said second posterior prosthesis has (in medial view) a curved sliding surface closed towards the front, the curvature of which is equal to (or close to) the curvature of the open surface of the first prosthesis; this facilitates the free relative antero-posterior rotation of two adjacent vertebrae equipped with these prostheses; the anteroposterior radius of curvature of these sliding surfaces can be adapted to the position of the vertebra for which the prosthesis is intended; the value of this radius is preferably chosen in a range going from 18 to 28 mm, more preferably from 20 to 26 mm, in particular close to 23 mm.
- the flexion-extension movements of the spine can be carried out along a common transverse axis for the intervertebral disc and for these joints.
- the sliding surfaces have both a dihedral shape and an anteroposterior (sagittal) curvature:
- the anterior prosthesis has a sliding surface in the form of a concave dihedron having a medial surface convex towards the rear along a radius of curvature close to 20 to 26 mm, and a substantially planar side face;
- the posterior prosthesis comprises a sliding surface in the form of a convex dihedron comprising a medial face concave towards the front with a radius of curvature close to 20 to 26 mm, and a substantially planar lateral face; in other words, in this case, said sliding surfaces extend substantially along a surface (and / or along a surface) of revolution generated by a curved segment rotating around a straight line (transverse) located in a plane containing the curved segment, at a distance from it which is equal to said radius of curvature; thus the sliding surfaces of the left and right prostheses substantially match portions of a shape of a toric groove (
- the invention consists in proposing an anterior prosthesis of posterior vertebral articulation which comprises a smooth sliding support surface as well as a bone support surface, and a structure for anchoring the prosthesis in the articular process which protrudes from said bone support surface; the invention also provides a posterior posterior vertebral joint prosthesis comprising a sliding bearing surface and a bone bearing surface, as well as a structure for anchoring the prosthesis in the vertebral isthmus and / or in the blade vertebral, which is protruding on said bone support face.
- the invention makes it possible to obtain prostheses well adapted to the human anatomy, compact, stable and not very traumatic.
- each of these anchoring structures comprises an elongated anchoring member - such as a lug or a rod - along an axis which is generally inclined relative to normal to the bone support surface; preferably said anchoring member is of substantially cylindrical shape along this axis, and is threaded or provided with grooves or protuberances on its external face, in order to increase the bone contact surface.
- an elongated anchoring member - such as a lug or a rod - along an axis which is generally inclined relative to normal to the bone support surface
- said anchoring member is of substantially cylindrical shape along this axis, and is threaded or provided with grooves or protuberances on its external face, in order to increase the bone contact surface.
- the anchoring resulting from this organ can be improved by the presence of a projecting rib along a part of the periphery of the bone support surface, by increasing the surface in contact. with the bone.
- the anchoring can be improved by the presence of two elongated anchoring members - such as rods or lugs - along two substantially orthogonal axes.
- Said elongated anchoring members can form a single piece with the prosthesis body comprising the bone support face and the sliding support face; alternatively or in addition, a separate anchoring member can be used, in particular in the form of a screw extending in an orifice provided in the prosthesis body.
- Figure 1 is a schematic dorsal view of the upper part of the sacrum and of the lumbar vertebrae L4 and L5, on which are represented four left posterior joint prostheses replacing two superposed left posterior joints.
- Figure 2 schematically illustrates in cranial view a left anterior joint prosthesis and a left posterior joint prosthesis replacing a posterior joint between two successive vertebrae of the spine.
- FIG. 3 schematically illustrates in perspective the shape of the sliding support surface of prostheses according to the invention.
- FIG. 4 schematically illustrates in lateral view of the vertebrae provided with articular prostheses and their mode of mutual displacement in rotation along a transverse axis.
- FIGS. 5 to 8 illustrate an embodiment of an anterior articular prosthesis adapted to the lumbosacral joint L5-S1 and
- FIGS. 9 to 11 illustrate a posterior articular prosthesis complementary to that of FIGS. 5 to 8.
- FIGS. 12 to 15 illustrate an embodiment of an anterior articular prosthesis adapted for the posterior articulation between the lumbar lumbers L4 and L5, and FIGS. 16 to 18 illustrate an articular prosthesis posterior complementary to the prosthesis of Figures 12 to 15.
- Figures 5, 9, 12, 16 are cranial views of the prostheses; Figures 6, 0, 13, 17 are medial views of the prostheses; Figures 7 and 14 are sagittal views; Figures 8 and 15 are horizontal views; Figures 11 and 18 are side views.
- Figures 7, 8, 14, 15 are sectional views.
- the invention is described below for the lumbar part of the spine, the invention is applicable to the posterior joints of the dorsal and cervical vertebrae.
- the replacement of a posterior vertebral joint, left or right is carried out using an anterior prosthesis 1, called the first prosthesis, and a posterior prosthesis 2, called the second prosthesis; the anterior prosthesis 1 is fixed to a vertebra such as L5 or to the sacrum S1, and the posterior prosthesis 2 is fixed to the vertebra located immediately above, such as L4 or L5 respectively.
- each of the prostheses 1, 2 comprises a body 6, 7 and a cylindrical anchoring rod 3, 5 integrated into the body and elongated along an axis 8, 9.
- the body 7 of the anterior prosthesis With reference to FIGS. 5 to 8 and 12 to 15, the body 7 of the anterior prosthesis
- the surface 11 has two faces 11a and 11b forming a kind of dihedral whose opening angle 12 towards the rear is close to 140 ° for the L5 prosthesis -S1 figure 5, and close to 120 ° for the L4 prosthesis- L5 Figure 12; moreover, these faces 11a, 11b extend along an intermediate surface 15a, 15b which is of revolution, of transverse axis 13 and whose radius of curvature 14 (FIGS. 3 and 4) is close to 23 mm ; the medial portion 11a of the sliding surface 11 is convex, while the lateral portion 11b of the surface 11 is planar.
- each posterior prosthesis 2 FIGS. 9 to 11 and 16 to 18 has a surface 16 of bone support and a surface 17 of support sliding on the surface 11 of the corresponding prosthesis 1; the surface 17 comprises a face 17a and a face 17b which form a convex dihedron (Figures 9 and 16) whose opening angle 18 is close to 220 ° ( Figure 9) or 240 ° ( Figure 16); the medial portion 17a of the sliding surface 17 is concave, while the lateral portion 17b is substantially planar.
- the concavity of the dihedral 11a, 11b of the anterior prosthesis is directed towards the rear, while the convexity of the dihedron 17a, 17b of the posterior prosthesis is directed towards the front.
- the posterior prosthesis L5-S1 (FIG. 10) has an orifice 19 specially designed to receive an additional anchoring screw (reference 4 in FIGS. 1 and 2) of the prosthesis in the vertebral blade 20.
- prostheses 1 and 2 The fixation of prostheses 1 and 2 is reinforced by the presence of stabilizing ribs 21 (FIGS. 5, 7, 8 in particular), 22, 23, 24 (FIGS. 10 and 17) which protrude at the periphery of the bearing surface.
- Preparation for implantation of the prostheses requires a posterior approach to the spine with exposure of the posterior joint (s) to be replaced. At least partial excision (or ablation) of the articular processes is necessary. On the anterior facet (or articular process) (or upper articular process of the underlying vertebra) only the articular surface is abraded with reduction of the overall volume of the facet and production of a sagittal anchoring hole in its lower part.
- a sub-total ablation is performed with an oblique section towards the vertebral lamina and perpendicular to the vertebral isthmus, and two anchoring holes, one sagittal in the axis of the isthmus towards the vertebral pedicle, and the other transverse in the thickness of the vertebral lamina, hollowed out from the spinous process.
- the anterior prosthesis 1 rests on the prepared stump of the anterior facet with penetration of its cylindrical anchoring lug into the anchoring hole.
- the prosthesis has on its rearward facing face a smooth articular surface 11, 11a, 11b whose shape is presented as a dihedral section open towards the rear (or of a pulley groove), with a medial sector narrow and frontal and a spreading and oblique lateral sector.
- the medial sector is frontal and the lateral sector of an obliquity which varies from 50 to 20 ° from the sacrum to the top of the lumbar spine.
- the two medial sectors 11a and lateral 11b of this prosthesis have a convexity turned towards the rear which corresponds to the arc of a circle whose center corresponds to the center of rotation common to the two posterior joints and to the intervertebral disc of the same vertebral movable segment (the radius of this circle is 23 mm on average).
- the posterior prosthesis 2 has a first integrated lug 3 intended to engage in the isthmic anchoring hole, as well as a second lug 4 which is separated from the body of the prosthesis and is screwed for lamar anchoring.
- the articular surface 17, 17a, 17b of sliding directed forwards rests intimately on the articular surface 11, 11a, 11b of the anterior prosthesis 1.
- Prostheses 1, 2 can be metallic or plastic or any other material which would prove to be biologically compatible.
- the fixation of the prostheses can be reinforced with plastic cement.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60235710T DE60235710D1 (de) | 2001-11-15 | 2002-11-15 | Gelenksprothese für den hintenliegenden wirbelsäulenbereich |
CA2466661A CA2466661C (fr) | 2001-11-15 | 2002-11-15 | Prothese d'articulation vertebrale posterieure |
AT02788060T ATE460910T1 (de) | 2001-11-15 | 2002-11-15 | Gelenksprothese für den hintenliegenden wirbelsäulenbereich |
EP02788060A EP1443879B1 (fr) | 2001-11-15 | 2002-11-15 | Prothese d'articulation vertebrale posterieure |
JP2003543505A JP4296091B2 (ja) | 2001-11-15 | 2002-11-15 | 後部脊椎関節補綴具 |
US10/493,217 US7147664B2 (en) | 2001-11-15 | 2002-11-15 | Posterior vertebral joint prosthesis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0114766A FR2832054B1 (fr) | 2001-11-15 | 2001-11-15 | Prothese d'articulation vertebrale posterieure |
FR01/14766 | 2001-11-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003041618A2 true WO2003041618A2 (fr) | 2003-05-22 |
WO2003041618A3 WO2003041618A3 (fr) | 2004-01-22 |
Family
ID=8869417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/003911 WO2003041618A2 (fr) | 2001-11-15 | 2002-11-15 | Prothese d'articulation vertebrale posterieure |
Country Status (8)
Country | Link |
---|---|
US (1) | US7147664B2 (fr) |
EP (1) | EP1443879B1 (fr) |
JP (1) | JP4296091B2 (fr) |
AT (1) | ATE460910T1 (fr) |
CA (1) | CA2466661C (fr) |
DE (1) | DE60235710D1 (fr) |
FR (1) | FR2832054B1 (fr) |
WO (1) | WO2003041618A2 (fr) |
Cited By (27)
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WO2005020850A2 (fr) | 2003-08-29 | 2005-03-10 | Gerraspine A.G. | Implant pour facette vertebrale |
WO2005104998A3 (fr) * | 2004-04-22 | 2006-04-06 | Archus Orthopedics Inc | Element de fixation anti-rotation pour protheses vertebrales |
EP1646340A2 (fr) * | 2003-07-17 | 2006-04-19 | LEE, Casey K. | Prothese de facette vertebrale |
JP2007506528A (ja) * | 2003-09-23 | 2007-03-22 | ファセット ソリューションズ インコーポレイテッド | 椎間関節置換 |
EP1799132A2 (fr) * | 2004-08-13 | 2007-06-27 | Ricardo Sasso | Joint de facette de remplacement et procede associe |
JP2007535973A (ja) * | 2004-02-17 | 2007-12-13 | ファセット ソリューションズ インコーポレイテッド | 脊椎用椎間関節インプラント |
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US9198766B2 (en) | 2003-05-14 | 2015-12-01 | Gmedelaware 2 Llc | Prostheses, tools, and methods for replacement of natural facet joints with artificial facet joint surfaces |
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Also Published As
Publication number | Publication date |
---|---|
EP1443879B1 (fr) | 2010-03-17 |
FR2832054B1 (fr) | 2004-09-10 |
JP2005508703A (ja) | 2005-04-07 |
FR2832054A1 (fr) | 2003-05-16 |
JP4296091B2 (ja) | 2009-07-15 |
ATE460910T1 (de) | 2010-04-15 |
US20050015146A1 (en) | 2005-01-20 |
EP1443879A2 (fr) | 2004-08-11 |
DE60235710D1 (de) | 2010-04-29 |
CA2466661C (fr) | 2010-12-21 |
US7147664B2 (en) | 2006-12-12 |
CA2466661A1 (fr) | 2003-05-22 |
WO2003041618A3 (fr) | 2004-01-22 |
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