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Publication numberUS20060293754 A1
Publication typeApplication
Application numberUS 11/468,601
Publication date28 Dec 2006
Filing date30 Aug 2006
Priority date19 Sep 2002
Also published asDE60331089D1, EP1549260A1, EP1549260B1, EP2002805A2, EP2002805A3, US7531001, US7731754, US8262732, US20050251262, US20070061011, US20080228274, US20080228277, US20080294259, US20100179419, US20170020681, US20170181867, WO2004026187A1
Publication number11468601, 468601, US 2006/0293754 A1, US 2006/293754 A1, US 20060293754 A1, US 20060293754A1, US 2006293754 A1, US 2006293754A1, US-A1-20060293754, US-A1-2006293754, US2006/0293754A1, US2006/293754A1, US20060293754 A1, US20060293754A1, US2006293754 A1, US2006293754A1
InventorsMalan deVilliers, Ulrich Hahnle
Original AssigneeSpinalmotion, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Intervertebral Prosthesis
US 20060293754 A1
Abstract
An intervertebral prosthesis for insertion between adjacent vertebrae includes a first prosthesis plate and a second prosthesis plate. The first and second prosthesis plates each comprise a midline, an engagement surface to engage a first vertebra and a bearing surface disposed opposite the engagement surface. The bearing surfaces of the first and second plates are arranged to cooperate to form an articulate joint. A first region of serrations is disposed on the engagement surface of the first plate on one side of the midline of the first plate, and a second region of serrations is disposed on the engagement surface of the first plate on an opposite side of the first plate midline. Each region comprises at least several serrations, and each serration comprises a base attached to one of the plates and tapers from the base to a tip.
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Claims(21)
1. An intervertebral prosthesis for insertion between adjacent vertebrae, the prosthesis comprising:
a first prosthesis plate comprising a midline, an engagement surface to engage a first vertebra and a bearing surface disposed opposite the engagement surface;
a second prosthesis plate comprising a midline, an engagement surface to engage a second vertebra and a bearing surface disposed opposite the engagement surface, wherein the bearing surfaces of the first and second plates are arranged to cooperate to form an articulate joint;
a first region of serrations disposed on the engagement surface of the first plate on one side of the midline of the first plate; and
a second region of serrations disposed on the engagement surface of the first plate on an opposite side of the first plate midline; and
wherein each region comprises at least several serrations and each serration comprises a base attached to one of the plates and tapers from the base to a tip.
2. The prosthesis according to claim 1 wherein the serrations of the first region are parallel to the serrations of the second region.
3. The prosthesis according to claim 1 wherein the serrations of the first and second regions are parallel to the midline.
4. The prosthesis according to claim 1 wherein the serrations of the first and second regions are symmetrically disposed about the midline.
5. The prosthesis according to claim 1 further comprising a core located between the plates, the core comprising a first surface adapted to engage the bearing surface of the first plate and a second surface adapted to engage the bearing surface of the second plate, wherein the first surface of the core and the bearing surface of the first plate comprise cooperating spherical surfaces.
6. The prosthesis according to claim, 5 wherein second surface of the core and the bearing surface of the second plate comprise cooperating spherical surfaces.
7. A prosthesis according to claim 1 further comprising a fin to anchor the first plate in the first vertebra, the fin disposed along the midline between the rows of serrations disposed on the first plate, the fin adapted to enter a cut in the first vertebra.
8. The prosthesis according to claim 7, wherein holes are formed transversely through the fin.
9. The prosthesis according to claim 1, wherein the bearing surface of each plate is bounded by an annular rim, wherein the annular rims are arranged to contact one another at a predetermined limit of articulate movement of the plates.
10. The prosthesis according to claim 1, wherein the bearing surface of each plate is bounded by an annular rim having a groove formed thereon, wherein the grooves are adapted to connect to a placement instrument while the prosthesis is inserted into the intervertebral space.
11. An intervertebral prosthesis for insertion between adjacent vertebrae, the prosthesis comprising:
a first prosthesis plate comprising a midline, an engagement surface to engage a first vertebra and a bearing surface disposed opposite the engagement surface;
a second prosthesis plate comprising a midline, an engagement surface to engage a second vertebra and a bearing surface disposed opposite the engagement surface, wherein the bearing surfaces of the first and second plates are arranged to cooperate to form an articulate joint;
a first region of serrations disposed on the engagement surface of the first plate on one side of the midline of the first plate;
a second region of serrations disposed on the engagement surface of the first plate on an opposite side of the first plate midline;
a third region of serrations disposed on the engagement surface of the second plate on one side of the midline of the second plate;
a fourth region of serrations disposed on the engagement surface of the second plate on an opposite side of the second plate midline; and
wherein each region comprises at least several serrations and each serration comprises a base attached one of the plates and tapers from the base to a tip.
12. The prosthesis according to claim 11 wherein the serrations of the third and fourth regions are identical the serrations of the first and second regions, respectively.
13. The prosthesis according to claim 11 wherein the serrations of the first region are parallel to the serrations of the second region and the serrations of the third region are parallel to the serrations of the fourth region.
14. The prosthesis according to claim 11 wherein the serrations of the first region and the serrations of the second region are parallel to the first plate midline and the serrations third region and the serrations of the fourth region are parallel to the second plate midline.
15. The prosthesis according to claim 11 wherein the serrations of the first and second regions are symmetrically disposed about the first plate midline and the serrations of the third and fourth regions are symmetrically disposed about the second plate midline.
16. The prosthesis according to claim 11 further comprising a core located between the plates, the core comprising a first surface adapted to engage the bearing surface of the first plate and a second surface adapted to engage the bearing surface of the second plate, wherein the first surface of the core and the bearing surface of the first plate comprise cooperating spherical surfaces.
17. The prosthesis according to claim, 11 wherein second surface of the core and the bearing surface of the second plate comprise cooperating spherical surfaces.
18. A prosthesis according to claim 11 further comprising:
a first fin to anchor the first plate in the first vertebra, the fin disposed along the midline between the regions of serrations disposed on the first plate, the fin adapted to enter a cut in the first vertebra; and
a second fin to anchor the second plate in the second vertebra, the fin disposed along the midline between the regions of serrations disposed on the second plate, the fin adapted to enter a cut in the second vertebra.
19. The prosthesis according to claim 18, wherein holes are formed transversely through the fins.
20. The prosthesis according to claim 11, wherein the bearing surface of each plate is bounded by an annular rim, wherein the annular rims are arranged to contact one another at a predetermined limit of articulate movement of the plates.
21. The prosthesis according to claim 11, wherein the bearing surface of each plate is bounded by an annular rim having a groove formed thereon, wherein the grooves are adapted to connect to a placement instrument while the prosthesis is inserted into the intervertebral space.
Description
    CROSS-REFERENCES TO RELATED APPLICATIONS
  • [0001]
    The present application is a continuation of U.S. patent application Ser. No. 11/084,224 (Atty. Docket No. 022031-001710US), filed on Mar. 18, 2005, which is a continuation-in-part of PCT/IB2003/001529 (Atty. Docket No. 022031-001700PC), filed on Apr. 24, 2003, designating the United States, which claimed priority from South African Application No. 2002/7517, filed on Sep. 19, 2002; the full disclosures of which are incorporated herein by reference.
  • BACKGROUND OF THE INVENTION
  • [0002]
    1. Field of the Invention
  • [0003]
    This invention relates to an intervertebral prosthesis.
  • [0004]
    In the event of damage to a spinal disc it is known practice to implant an intervertebral prosthesis surgically to replace the damaged organ. Several types of prosthesis for this purpose are known and in common use.
  • [0005]
    One type of known intervertebral prosthesis is sold by Waldemar Link GmbH & Co under the trademark LINK® SB Charité. This prosthesis includes upper and lower prosthesis plates which locate against and engage the adjacent vertebral bodies, and a low friction core between the plates. The core has upper and lower convexly curved surfaces and the plates have corresponding, concavely curved recesses which cooperate with the curved surfaces of the core. This allows the plates to slide over the core to allow required spinal movements to take place. The curved recesses in the plates are surrounded by annular ridges which locate, at the limit of sliding movement of the plates over the core, in opposing peripheral channels surrounding the curved surfaces of the core.
  • [0006]
    This type of configuration is also described in European Patent Publication Nos. EP 0 560 140 and EP 0 560 141 (both Waldemar Link GmbH & Co). However a drawback of such configurations is that the provision of the peripheral ribs and channels limits the areas available for bearing and sliding contact between the plates and core, and accordingly the loads which can be transmitted by the prosthesis. As a result of the relatively small bearing areas, it is believed that at least the core will be subject to rapid wear and have a relatively short life-span.
  • [0007]
    EP 0 560 141 also describes one alternative arrangement in which the curved surfaces of the core carry opposing, elongate keys that locate in elongate grooves in the plates and another alternative arrangement in which the plates have opposing elongate keys that locate in elongate grooves in the opposite curved surfaces of the core. These key and groove arrangements allow the plates to slide freely over the core, within the limits of the length of the grooves, in one plane only. Although allowance is made for some lateral play of the keys in the grooves, very little sliding movement of the plates over the core can take place in the orthogonal vertical plane, and this is considered to be a serious drawback of this design.
  • [0008]
    2. Description of the Background Art
  • [0009]
    European Patent Publication Nos. EP 0 560 140 and EP 0 560 141 have been discussed above. U.S. Patent Publication Nos. US2002/0035400 and US2002/0128715 describe intervertebral prostheses with center-posts received in passages in a core. The core possesses an annular flange structure engaged by extensions on the plates.
  • BRIEF SUMMARY OF THE INVENTION
  • [0010]
    According to the invention there is provided an intervertebral prosthesis for insertion between adjacent vertebrae, the prosthesis comprising upper and lower prosthesis plates locatable against the respective vertebrae and having opposing, concavely curved recesses therein and a core located between the plates, the core having opposed, convexly curved surfaces received in the recesses of the plates to allow the plates to slide in articulated manner over the core, characterized in that:
      • the opposed surfaces of the core and the recesses of the plates have cooperating spherical curvatures,
      • the recess of a plate surrounds a locating peg projecting centrally from the base of the recess, and
      • the peg locates loosely in an opening located centrally in a curved surface of the core, whereby the plates can slide over the core in all directions while the peg holds the core captive.
  • [0014]
    In some embodiments, only one of the plates, typically the operatively lower plate, includes a peg. In other embodiments, both plates include pegs, the pegs opposing one another and locating loosely in respective openings located centrally in the opposed curved surfaces of the core. In each embodiment it is preferred that each peg and the opening in which it locates are conical in shape.
  • [0015]
    According to another aspect of the invention there is provided a prosthesis plate for use in a prosthesis as summarized above, the prosthesis plate having a coarse surface locatable against a vertebra, an oppositely facing concavely curved surface which is complemental in shape to a convexly curved surface of a core of the prosthesis, characterized in the concavely curved surface of the plate has a spherical curvature and in that the plate includes a conical locating peg extending centrally from the concavely curved surface, the peg being locatable loosely in a central opening in the convexly curved surface of the core.
  • [0016]
    According to yet another aspect of the invention there is provided a core for use in the prosthesis, the core comprising a one piece plastics body having operatively upper and lower curved surfaces, characterized in that the curved surfaces of the body are spherically curved and at least one of the surfaces has a central, conical opening therein dimensioned to receive a conical locating peg of a prosthesis plate loosely.
  • [0017]
    Other features of the invention are set forth in the appended claims.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0018]
    The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:
  • [0019]
    FIG. 1 shows a cross-sectional view of a prosthesis plate used in a prosthesis according to the invention;
  • [0020]
    FIG. 2 shows a plan view of the prosthesis plate seen in FIG. 1;
  • [0021]
    FIG. 3 shows a cross-sectional view of a core used in a prosthesis according to the invention;
  • [0022]
    FIG. 4 shows a plan view of the core seen in FIG. 3;
  • [0023]
    FIG. 5 shows a cross-sectional view of an intervertebral prosthesis according to a first embodiment of the invention in a neutral condition before articulation has taken place;
  • [0024]
    FIG. 6 shows the prosthesis of FIG. 5 articulated to a limit position; and
  • [0025]
    FIG. 7 shows a cross-sectional view of an intervertebral prosthesis according to a second embodiment of the invention.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0026]
    The prosthesis plate 10 seen in FIGS. 1 and 2 may be formed from titanium, typically being formed in one piece of grade 5 titanium. Other suitable materials include titanium nitrides, cobalt chrome alloys, and ceramics. The prosthesis plate includes a major surface 12 which is machined to a coarse, serrated finish 14. Projecting from the surface 12 is an elongate fin 16 pierced by transverse holes 18. The opposite surface of the plate 10 is formed with a recess 20 surrounding a projecting conical peg 22 of round cross-section at the centre of the recess. The recess is bounded by an annular rim 24. The surface 26 of the recess is concavely, spherically curved and has a titanium nitride finish.
  • [0027]
    A first embodiment of prosthesis of the invention, indicated generally by the numeral 28 in FIGS. 5 and 6, includes a pair of identical prosthesis plates 10 arranged in opposition to one another. The prosthesis 28 also includes a core 30 illustrated in FIGS. 3 and 4. The core is made in one piece of a low friction plastics material, in this case a polyethylene known as Orthosol, but a variety of other high molecular weight polyethylenes might also find use. Alternatively, the core could be composed of a metal, such as cobalt chrome, or of a ceramic. The core is generally in the form of a circular, doughnut-shaped toroid and has identical upper and lower surfaces 32 which are convexly, spherically curved. The upper and lower surfaces 32 are formed centrally with conical openings 34, in this case forming the opposite ends of a circular cross-section passage 36 passing axially and centrally through the body of the core.
  • [0028]
    The core surfaces 32 and recess surface 26 have the same radius of curvature which is, in this case, 18 mm.
  • [0029]
    In the assembled prosthesis 28, the plates 10 are arranged in opposition to one another with the core 30 located between them. The pegs 22 of the plates locate in the openings 34, i.e. in the ends of the passage 36. The combined length of the pegs is less than the length of the passage 36, so the inner ends of the pegs are spaced apart from one another by a short distance 38, as shown in FIG. 5. The transverse dimension of each peg is, at all points along the length of the peg, considerably less than the diameter of the passage 36 at the corresponding point along the length of the passage.
  • [0030]
    The cooperating spherical surfaces 26 and 32 and the relative dimensions of the pegs 22 and the passage 36 allow the plates 10 to slide or articulate over the core through a fairly large range of angles and in all directions or degrees of freedom, including rotation about the central axis.
  • [0031]
    At a predetermined limit of articulated movement of the plates relative to the core, the rims 24 of the plates contact with one another as indicated by the numeral 40 in FIG. 6. Further articulation of the prosthesis 28 beyond this point is not possible. At the limit of articulation, the pegs 22 also come into abutment with the side of the passage 36, as also illustrated in FIG. 6.
  • [0032]
    It will also be noted in FIG. 6 that the openings 34 at the ends of the passage 36 are defined by similar cone angles to the pegs 22, so that contact between the pegs and the sides of the openings takes place complementally over virtually the entire length of each peg.
  • [0033]
    Throughout the range of possible articulation, the pegs 22 remain in the passage 36 and prevent the core from separating laterally from the plates 10. In other words, the core is held captive by the pegs during all possible articulations which can take place. In the illustrated embodiment, the plates 10 are limited to 12° of articulation before the rims 24 abut one another, i.e. 12° is the maximum articulation which can take place.
  • [0034]
    In the prosthesis 28 described above, the pegs 22 locate in a passage 32 which passes right through the core 30. It will however be understood that in other embodiments, the pegs could merely locate in blind recesses or openings in the opposite surfaces of the core without such openings actually being joined to one another to form a continuous passage.
  • [0035]
    FIG. 7 illustrates a prosthesis according to a second embodiment of the invention in a view similar to that of FIG. 5. In FIG. 7, components corresponding to components illustrated in the earlier Figures are indicated by the same reference numerals.
  • [0036]
    The lower prosthesis plate 10 in FIG. 7 is identical to the prosthesis plates of the first embodiment. However, the upper prosthesis plate, designated 10.1, has no central peg. Instead, the surface 26 is continuously, spherically curved. In all other respects the plate 10.1 is identical to the plate 10.
  • [0037]
    In the assembled prosthesis 50, the core is held captive by the action of the single peg 22 carried by the lower prosthesis plate 10. The core 30 is identical to the core described previously but once again it will be appreciated that core could have a blind recess in its downwardly facing, curved surface 32 only to receive the single peg 22.
  • [0038]
    The prosthesis 28, 50 is surgically implanted between adjacent spinal vertebrae in place of a damaged disc. Those skilled in the art will understand that the adjacent vertebrae are forcibly separated from one another to provide the necessary space for insertion. The plates 10, 10.1 are slipped laterally into place between the vertebrae with their fins 16 entering slots cut in the opposing vertebral surfaces to receive them.
  • [0039]
    After insertion of the core between the opposing plates, the vertebra are allowed to move together to hold the assembled prosthesis in place.
  • [0040]
    The surfaces 12 of the plates 10, 10.1 locate against the opposing vertebrae and, with passage of time, firm connection between the plates and the vertebrae will be achieved as bone tissue grows over the serrated finish. Bone tissue growth will also take place about the fins 16 and through the holes 18 therein, further enhancing the connection which is achieved.
  • [0041]
    Referring to FIGS. 3 and 4, the core 30 used in the embodiments described above is formed with narrow, angularly spaced, blind passages which accommodate titanium pins 42. The core itself is transparent to X-radiation and so would normally be invisible in a post-operative X-ray examination. The pins 42 serve as radiographic markers and enable the position of the core 30 to be ascertained during such examination.
  • [0042]
    Annular grooves 44 are provided in the plates 10, 10.1 to facilitate holding and manipulation of the prosthesis by appropriate instruments during placement into the intervertebral disc space.
  • [0043]
    Compared to known prostheses, the prostheses 28, 50 described above have a number of advantages, as follows:
    • 1. The peg or pegs 22 hold the core captive and prevent it from slipping out sideways.
    • 2. At a predetermined maximum limit of articulation, the rims 24 contact one another to prevent further articulation. At the same time, the peg or pegs 22 contact the sides of the openings 34, also preventing further articulation.
    • 3. An acceptable bearing area of the plates on the core is obtained with the central peg/central opening configurations described above. This is particularly advantageous compared to prior art prostheses where the core has peripheral channels on its upper and lower surfaces to receive peripheral rims on the plates at the limit of articulation.
  • [0047]
    In practice, it may happen that there is imperfect alignment of the prosthesis plates. In the case of very poor alignment, the dual peg configuration of FIGS. 5 and 6 gives rise to the possibility that the pegs 22 are laterally offset from one another by a substantial distance. This can in turn lead to the undesirable consequence that the range of articulation which can be accommodated is unduly limited, and attempts to articulate past the limit could result in damage to the core by the misaligned pegs. In the embodiment of FIG. 7 the single peg can be received centrally by the core, thereby avoiding this potential problem.
  • [0048]
    The principles of the invention are applicable to prosthetic disc implants for lumbar vertebrae as well as cervical vertebrae. In the latter case, the fins 16 will typically be omitted.
  • [0049]
    While the present invention has been described with respect to particular embodiments and specific examples thereof, it should be understood that other embodiments may fall within the spirit and scope of the invention. Therefore, the scope of the invention is limited solely by the claims and their full range of equivalents.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4759766 *9 Sep 198726 Jul 1988Humboldt-Universitaet Zu BerlinIntervertebral disc endoprosthesis
US4759769 *22 Jun 198726 Jul 1988Health & Research Services Inc.Artificial spinal disc
US4834757 *28 Mar 198830 May 1989Brantigan John WProsthetic implant
US4863477 *12 May 19875 Sep 1989Monson Gary LSynthetic intervertebral disc prosthesis
US4997432 *14 Mar 19895 Mar 1991Waldemar Link Gmbh & Co.Surgical instrument set
US5035716 *10 May 199030 Jul 1991Downey Ernest LReplacement disc
US5057108 *12 Jan 199015 Oct 1991Zimmer, Inc.Method of surface finishing orthopedic implant devices
US5122130 *25 Oct 199016 Jun 1992Waldemar Link Gmbh & Co.Forceps for inserting intervertebral device
US5195526 *26 Dec 199023 Mar 1993Michelson Gary KSpinal marker needle
US5282661 *30 Jun 19921 Feb 1994Steyr-Daimler-Puch AgCollapsible driver's cab for a truck
US5314477 *4 Mar 199124 May 1994J.B.S. Limited CompanyProsthesis for intervertebral discs and instruments for implanting it
US5401269 *10 Mar 199328 Mar 1995Waldemar Link Gmbh & Co.Intervertebral disc endoprosthesis
US5415704 *13 Sep 199316 May 1995Smith & Nephew Richards Inc.Surface hardened biocompatible metallic medical implants
US5489307 *1 Sep 19946 Feb 1996Spine-Tech, Inc.Spinal stabilization surgical method
US5507816 *1 Dec 199216 Apr 1996Customflex LimitedSpinal vertebrae implants
US5534030 *25 Apr 19949 Jul 1996Acromed CorporationSpine disc
US5556431 *9 Aug 199417 Sep 1996B+E,Uml U+Ee Ttner-Janz; KarinIntervertebral disc endoprosthesis
US5674296 *22 Jul 19967 Oct 1997Spinal Dynamics CorporationHuman spinal disc prosthesis
US5676701 *7 Jun 199514 Oct 1997Smith & Nephew, Inc.Low wear artificial spinal disc
US5676702 *1 Dec 199514 Oct 1997Tornier S.A.Elastic disc prosthesis
US5797909 *7 Jun 199525 Aug 1998Michelson; Gary KarlinApparatus for inserting spinal implants
US5865846 *15 May 19972 Feb 1999Bryan; VincentHuman spinal disc prosthesis
US5888226 *12 Nov 199730 Mar 1999Rogozinski; ChaimIntervertebral prosthetic disc
US5899901 *1 Nov 19954 May 1999Middleton; Jeffrey KeithSpinal fixation system
US5899911 *5 Dec 19974 May 1999Inlet Medical, Inc.Method of using needle-point suture passer to retract and reinforce ligaments
US5928284 *9 Jul 199827 Jul 1999Mehdizadeh; Hamid M.Disc replacement prosthesis
US6019792 *23 Apr 19981 Feb 2000Cauthen Research Group, Inc.Articulating spinal implant
US6022376 *16 Mar 19988 Feb 2000Raymedica, Inc.Percutaneous prosthetic spinal disc nucleus and method of manufacture
US6039763 *27 Oct 199821 Mar 2000Disc Replacement Technologies, Inc.Articulating spinal disc prosthesis
US6096038 *7 Jun 19951 Aug 2000Michelson; Gary KarlinApparatus for inserting spinal implants
US6176881 *15 Apr 199723 Jan 2001SynthesTelescopic vertebral prosthesis
US6235030 *28 Dec 199922 May 2001St. Francis Medical Technologies, Inc.Spine distraction implant
US6261296 *1 Oct 199917 Jul 2001Synthes U.S.A.Spinal disc space distractor
US6348071 *30 Oct 199819 Feb 2002Depuy Acromed, Inc.Spinal disc
US6368350 *11 Mar 19999 Apr 2002Sulzer Spine-Tech Inc.Intervertebral disc prosthesis and method
US6416551 *19 May 20009 Jul 2002Waldemar Link (Gmbh & Co.)Intervertebral endoprosthesis with a toothed connection plate
US6447544 *4 Oct 199910 Sep 2002Gary Karlin MichelsonLordotic interbody spinal fusion implants
US6517580 *9 Mar 200011 Feb 2003Scient'x Societe A Responsabilite LimitedDisk prosthesis for cervical vertebrae
US6520996 *5 Jun 200018 Feb 2003Depuy Acromed, IncorporatedOrthopedic implant
US6527804 *9 Dec 19994 Mar 2003Dimso (Distribution Medicale Du Sud-Quest)Intervertebral disk prosthesis
US6562047 *16 Jul 200113 May 2003Spine Core, Inc.Vertebral bone distraction instruments
US6582466 *9 Dec 199924 Jun 2003Stryker SpineIntervertebral disc prosthesis with reduced friction
US6592624 *16 Nov 200015 Jul 2003Depuy Acromed, Inc.Prosthetic implant element
US6599294 *26 Jul 200129 Jul 2003Aesculap Ag & Co. KgSurgical instrument for introducing intervertebral implants
US6607558 *3 Jul 200119 Aug 2003Axiomed Spine CorporationArtificial disc
US6610092 *9 Nov 200126 Aug 2003Spinefore, Inc.Intervertebral spacer device having a slotted partial circular domed arch strip spring
US6682562 *2 Mar 200127 Jan 2004Eurosurgical SaIntervertebral disc prosthesis
US6689132 *18 Oct 200210 Feb 2004Spineco, Inc.Spinal implant insertion tool
US6706068 *22 Apr 200316 Mar 2004Bret A. FerreeArtificial disc replacements with natural kinematics
US6712825 *14 Jun 200130 Mar 2004Max AebiSpinal disc space distractor
US6723097 *23 Jul 200220 Apr 2004Depuy Spine, Inc.Surgical trial implant
US6728720 *13 Jun 200027 Apr 2004Robert Stephen Gerard LenzieIdentifying preferred indexes for databases
US6740118 *9 Jan 200225 May 2004Sdgi Holdings, Inc.Intervertebral prosthetic joint
US6770095 *18 Jun 20023 Aug 2004Depuy Acroned, Inc.Intervertebral disc
US6875213 *21 Feb 20035 Apr 2005Sdgi Holdings, Inc.Method of inserting spinal implants with the use of imaging
US6936071 *2 Jul 199930 Aug 2005Spine Solutions, Inc.Intervertebral implant
US6994727 *15 Dec 20037 Feb 2006Amedica CorporationTotal disc implant
US7025787 *25 Nov 200211 Apr 2006Sdgi Holdings, Inc.Implantable joint prosthesis and associated instrumentation
US7056344 *6 Nov 20026 Jun 2006Ldr MedicalOsseous anchoring device for a prosthesis
US7060073 *10 Apr 200213 Jun 2006Sdgi Holdings, Inc.Devices and techniques for a posterior lateral disc space approach
US7179294 *11 Apr 200320 Feb 2007Warsaw Orthopedic, Inc.Articular disc prosthesis and method for implanting the same
US7182784 *18 Sep 200327 Feb 2007Smith & Nephew, Inc.Prosthetic devices employing oxidized zirconium and other abrasion resistant surfaces contacting surfaces of cross-linked polyethylene
US20010016773 *28 Dec 200023 Aug 2001Hassan SerhanSpinal disc
US20020035400 *13 Feb 200121 Mar 2002Vincent BryanImplantable joint prosthesis
US20020045904 *26 Jul 200118 Apr 2002Aesculap Ag & Co. KgSurgical instrument for introducing intervertebral implants
US20020068936 *27 Sep 20016 Jun 2002Burkus J. KennethMethods and instrumentation for vertebral interbody fusion
US20020128715 *8 Aug 200112 Sep 2002Vincent BryanImplantable joint prosthesis
US20030009224 *3 Jul 20019 Jan 2003Axiomed Inc.Artificial disc
US20030045939 *23 Aug 20026 Mar 2003Simon CasuttArtificial intervertebral disc
US20030074076 *25 Nov 200217 Apr 2003Ferree Bret A.Artificial intervertebral disc replacements with endplates
US20030100951 *10 Jan 200329 May 2003Hassan SerhanSpinal disc
US20030135277 *25 Nov 200217 Jul 2003Sdgi Holdings, Inc.Implantable joint prosthesis and associated instrumentation
US20040002761 *19 Jun 20031 Jan 2004Christopher RogersIntervertebral disc having translation
US20040024407 *10 May 20035 Feb 2004Ralph James D.Vertebral bone distraction instruments
US20040024410 *2 Aug 20025 Feb 2004Scimed Life Systems, Inc.Media delivery device for bone structures
US20040030391 *24 Apr 200312 Feb 2004Bret FerreeArtificial intervertebral disc spacers
US20040073312 *16 Jul 200315 Apr 2004Lukas EisermannIntervertebral prosthetic joint
US20040143270 *14 Oct 200322 Jul 2004St. Francis Medical Technologies, Inc.Tools for implanting artificial vertebral disk and method
US20040176843 *6 May 20049 Sep 2004Rafail ZubokInstrumentation and methods for use in implanting a cervical disc replacement device
US20050021145 *26 May 200427 Jan 2005Spinalmotion, Inc.Prosthetic disc for intervertebral insertion
US20050021146 *26 May 200427 Jan 2005Spinalmotion, Inc.Intervertebral prosthetic disc
US20050043800 *20 Apr 200424 Feb 2005Paul David C.Prosthetic spinal disc replacement
US20050085917 *30 Nov 200421 Apr 2005Thierry MarnayIntervertebral implant
US20050107881 *3 May 200419 May 2005Neville AlleyneArtificial spinal disk
US20050149189 *10 Jun 20047 Jul 2005Mokhtar Mourad B.Intervertebral disk prosthesis
US20050192586 *25 Feb 20051 Sep 2005St. Francis Medical Technologies, Inc.Method of preparing for an artificial intervertebral implant using tool
US20050192670 *11 Feb 20051 Sep 2005Spinecore, Inc.Artificial intervertebral disc having an articulating joint
US20050197706 *4 Feb 20058 Sep 2005Ldr Medical, Inc.Intervertebral disc prosthesis
US20060004453 *25 May 20055 Jan 2006Depuy Spine, Inc.Ceramic disc prosthesis
US20060025862 *30 Jul 20042 Feb 2006Spinalmotion, Inc.Intervertebral prosthetic disc with metallic core
US20060029186 *21 Jul 20059 Feb 2006Spinalmotion, Inc.Spinal midline indicator
US20060030862 *21 Jul 20059 Feb 2006Spinalmotion, Inc.Intervertebral prosthesis placement instrument
US20060036325 *11 Oct 200516 Feb 2006Globus Medical Inc.Anterior prosthetic spinal disc replacement
US20060041313 *18 May 200523 Feb 2006Sdgi Holdings, Inc.Intervertebral disc system
US20060069439 *3 Dec 200430 Mar 2006St. Francis Medical Technologies, Inc.Artificial vertebral disk replacement implant with translating articulation contact surface and method
US20060178744 *4 Feb 200510 Aug 2006Spinalmotion, Inc.Intervertebral prosthetic disc with shock absorption
US20070061011 *30 Aug 200615 Mar 2007Spinalmotion, Inc.Intervertebral Prosthesis
US20080051900 *26 Jul 200728 Feb 2008Spinalmotion, Inc.Spinal Prosthesis with Offset Anchors
US20080051901 *26 Jul 200728 Feb 2008Spinalmotion, Inc.Spinal Prosthesis with Multiple Pillar Anchors
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US773175430 Aug 20068 Jun 2010Spinalmotion, Inc.Intervertebral prosthesis
US775395626 May 200413 Jul 2010Spinalmotion, Inc.Prosthetic disc for intervertebral insertion
US800283428 Apr 200923 Aug 2011Spinalmotion, Inc.Intervertebral prosthetic disc with metallic core
US806237128 Apr 200922 Nov 2011Spinalmotion, Inc.Intervertebral prosthetic disc with metallic core
US80837974 Feb 200527 Dec 2011Spinalmotion, Inc.Intervertebral prosthetic disc with shock absorption
US809042811 Nov 20093 Jan 2012Spinalmotion, Inc.Spinal midline indicator
US809253815 Apr 200810 Jan 2012Spinalmotion, Inc.Intervertebral prosthetic disc
US82064477 Mar 200826 Jun 2012Spinalmotion, Inc.Methods and apparatus for intervertebral disc prosthesis insertion
US820644916 Jul 200926 Jun 2012Spinalmotion, Inc.Artificial intervertebral disc placement system
US826273230 May 200811 Sep 2012Spinalmotion, Inc.Intervertebral prosthesis
US83987129 Nov 201119 Mar 2013Spinalmotion, Inc.Intervertebral prosthetic disc with shock absorption
US844469512 May 200921 May 2013Spinalmotion, Inc.Prosthetic disc for intervertebral insertion
US845469813 Feb 20084 Jun 2013Spinalmotion, Inc.Prosthetic disc for intervertebral insertion
US84861474 Feb 200816 Jul 2013Spinalmotion, Inc.Posterior spinal device and method
US850663115 Sep 201013 Aug 2013Spinalmotion, Inc.Customized intervertebral prosthetic disc with shock absorption
US863680521 May 201228 Jan 2014Spinalmotion, Inc.Artificial intervertebral disc placement system
US868503521 Jul 20051 Apr 2014Spinalmotion, Inc.Intervertebral prosthesis placement instrument
US873451912 Apr 200727 May 2014Spinalmotion, Inc.Posterior spinal device and method
US875844122 Oct 200824 Jun 2014Spinalmotion, Inc.Vertebral body replacement and method for spanning a space formed upon removal of a vertebral body
US87648339 Mar 20091 Jul 2014Spinalmotion, Inc.Artificial intervertebral disc with lower height
US877135614 Sep 20128 Jul 2014Spinalmotion, Inc.Intervertebral prosthetic disc
US880179222 Jul 201012 Aug 2014Spinalmotion, Inc.Posterio spinal device and method
US884572925 Nov 200930 Sep 2014Simplify Medical, Inc.Prosthetic disc for intervertebral insertion
US884573016 Jul 200930 Sep 2014Simplify Medical, Inc.Posterior prosthetic intervertebral disc
US897453130 Dec 200910 Mar 2015Simplify Medical, Inc.Methods and apparatus for intervertebral disc prosthesis insertion
US89745338 Jan 201410 Mar 2015Simplify Medical, Inc.Prosthetic disc for intervertebral insertion
US901154417 Aug 201021 Apr 2015Simplify Medical, Inc.Polyaryletherketone artificial intervertebral disc
US90340387 Apr 200919 May 2015Spinalmotion, Inc.Motion limiting insert for an artificial intervertebral disc
US91077623 Nov 201118 Aug 2015Spinalmotion, Inc.Intervertebral prosthetic disc with metallic core
US921602416 Sep 200522 Dec 2015DePuy Synthes Products, Inc.System and method for an intervertebral implant
US92206031 Jul 200929 Dec 2015Simplify Medical, Inc.Limited motion prosthetic intervertebral disc
US935184625 Aug 201431 May 2016Simplify Medical, Inc.Posterior prosthetic intervertebral disc
US940274524 Nov 20092 Aug 2016Simplify Medical, Inc.Intervertebral prosthesis placement instrument
US94397747 Jan 201113 Sep 2016Simplify Medical Pty LtdIntervertebral prosthetic disc
US943977522 May 201413 Sep 2016Simplify Medical Pty LtdArtificial intervertebral disc with lower height
US9452060 *4 Mar 201527 Sep 2016Globus Medical, Inc.Six degree spine stabilization devices and methods
US955491712 Jul 201331 Jan 2017Simplify Medical Pty LtdCustomized intervertebral prosthetic disc with shock absorption
US965574110 May 201623 May 2017Simplify Medical Pty LtdProsthetic disc for intervertebral insertion
US966887811 Aug 20166 Jun 2017Simplify Medical Pty LtdArtificial intervertebral disc with lower height
US96873552 Dec 201627 Jun 2017Simplify Medical Pty LtdCustomized intervertebral prosthetic disc with shock absorption
US20050021145 *26 May 200427 Jan 2005Spinalmotion, Inc.Prosthetic disc for intervertebral insertion
US20060025862 *30 Jul 20042 Feb 2006Spinalmotion, Inc.Intervertebral prosthetic disc with metallic core
US20090216330 *16 Sep 200527 Aug 2009Christophe GeisertSystem and method for an intervertebral implant
US20150173912 *4 Mar 201525 Jun 2015Globus Medical, Inc.Six degree spine stabilization devices and methods
Legal Events
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16 Jul 2014ASAssignment
Owner name: SIMPLIFY MEDICAL, INC., CALIFORNIA
Free format text: CHANGE OF NAME;ASSIGNOR:SPINALMOTION, INC.;REEL/FRAME:033347/0141
Effective date: 20140702