WO2007076265A1 - Vertebral rod assemblies and methods - Google Patents
Vertebral rod assemblies and methods Download PDFInfo
- Publication number
- WO2007076265A1 WO2007076265A1 PCT/US2006/061998 US2006061998W WO2007076265A1 WO 2007076265 A1 WO2007076265 A1 WO 2007076265A1 US 2006061998 W US2006061998 W US 2006061998W WO 2007076265 A1 WO2007076265 A1 WO 2007076265A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- base
- extension
- fastener
- assembly
- vertebral
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- 230000000712 assembly Effects 0.000 title description 3
- 238000000429 assembly Methods 0.000 title description 3
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 241000283986 Lepus Species 0.000 claims 1
- 230000000295 complement effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 210000000115 thoracic cavity Anatomy 0.000 description 3
- 210000004705 lumbosacral region Anatomy 0.000 description 2
- 210000000954 sacrococcygeal region Anatomy 0.000 description 2
- 239000007943 implant Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
- A61B17/7005—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7056—Hooks with specially-designed bone-contacting part
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/32—Articulated members
- Y10T403/32254—Lockable at fixed position
Definitions
- the present application relates generally to spinal implant assemblies, and more particularly to a vertebral rod system having first and second ecm&ectable and adjustable members.
- the spine Is divided into four regions comprising the cervical, thoracic, lumbar, and sacrococcygeal regions.
- the cervical region includes the top seven vertebrae identified as C1-C7.
- the thoracic region includes the next twelve vertebrae identified as T1-T12.
- the lumbar region includes five vertebrae L I-L5.
- the sacrococcygeal region includes nine fused vertebrae that form the sacrum and the coccyx:.
- the vertebrae of the spine are aligned in a curved configuration that includes a cervical curve, thoracic curve, and lumbosacral curve.
- Vertebra! rods may be implanted to support and position the vertebrae in. one or more of these regions.
- the rods extend along a section of the spine and are connected to the vertebrae with one or more fasteners.
- the rods may have a curved configuration to conform to the curvature of the spine. Often times two or more rods are connected together and work in combination to support and position the vertebrae.
- the rods may have the same or different shapes and sixes depending upon their position along the spine.
- the vertebral rod assembly comprises first and second members that may rotate with respect to each other about s first axis.
- Each of the first and second members includes a base and a vertebral support rod extending from the base.
- the base on the first member includes- an extension member that extends into an opening formed in the base of the second member.
- a fastener extends through a sklewa ⁇ ! of the base of the second member and into the opening to lock the first and second members, and to prevent the rotation of the first member and second member.
- Figure 1 is a perspective view of a vertebral rod assembly according to one embodiment.
- Figure 2 is a perspective view of a first member of a vertebral rod assembly according to one embodiment
- Figure 3 h a perspective view of a second member of a vertebral rod assembly according to one er ⁇ bodi ⁇ ient.
- Figure 4 Is a cross sectional view of one embodiment of a vertebral rod assembly.
- Figure 5 Is a perspective view of a vertebral rod assembly according to one embodiment.
- Figure 6 $s a perspective view a first member of a vertebral rod assembly according to one embodiment.
- Figure 7 is a perspective view a second member of a vertebral rod assembly 1.5 according to one embodiment.
- Figure S is a perspective view of a ring member according to one embodiment.
- Figure 9 is a cross sectional view of one embodiment of a vertebral rod assembly.
- Figure 10 is a cross sectional view of one embodiment of a vertebral rod assembly.
- the present application is directed to vertebral rod assemblies, with one embodiment generally illustrated as element i0 in Figure 1, having first and second members 12, 14.
- Members ⁇ 2 f 14 are selectively positionabie at a variety of angies to conform to the curvature of the patient's spine.
- Each member 12, 14 includes a rod and a
- a locking device locks the position of the members .12, 14 at the desired orientation to prevent further movement.
- Figure 2 illustrates the first member ] 2 having a rod 16 and a base 18.
- the rod .16 is attached to the base 1.8 arid, extends outward therefrom.
- rod 16 and base ⁇ 8 are integrally formed together.
- Base IS includes a first
- splines 22a spaced thereabout forming a series of a3ten.iat.ifig ridges and valleys.
- Splines 22a cover at least a portion of the first surface 20.
- the splines 22a are spaced about the periphery, and extend radially Inward from an outer edge of the first surface 20 towards a central point as can be seen in Figure 2.
- the splines 22a extend outwards from about the central point of tlie first surface 20 towards the periphery.
- An extensions 24 extends outward from the first surface 20 and includes a shaft 26 5 having an angled surface 30 that, flares outward to form an enlarged head 28.
- Surface 30 slopes outward away from the first surface 20 and terminates at a flat outer surface of the head 28.
- a rim 32 may be positioned at the peripheral edges of the angled surface 30 and the head 28.
- Figure 3 Illustrates the second member 14 having a rod 34 and a base 36.
- rod 34 is attached to or integrally formed with the base 36 and extends outward therefrom.
- Base 36 includes a first surface 38 having a plurality of splines 22b formed as alternating ridges and valleys. Splines 22h are formed to correspond to the size and spacing of splines 22a on the .first member 12.
- An opening 40 extends from the first surface 3S into the interior of the base 36 and Is sized to receive the 1.5 extension 24.
- One or .more openings 42 are formed in a sidewail of the base 36 and extend into the interior of the base 36.
- a pair of openings 42 are positioned in the base 36 and spaced apart by about 180° (i.e., the openings 42 are on opposite sides of the base 36). Multiple openings 42 allow for easier access during the locking and unlocking procedures as will be discussed below. In one embodiment, the one or more 0 openings 42 may be threaded.
- a fastener 44 extends through the opening 42 formed in the base 36.
- fastener 44 is a screw having threads that engage the threads formed on the opening 42.
- Fastener 44 inserts into the opening 42, and has a contact surface 46 that contacts against the surface 30 of the extension 24. The surfaces
- 25 3 ⁇ > 46 have corresponding shapes to increase the area of contact between the iastenet 44 and extension 24 when the first and second members 12, 14 are coupled in a locked configuration.
- the contact surface 46 at the end of the fastener 44 is angled and corresponds to the angle of surface 30. In other embodiments,, however, surfaces 30, 46 may not have corresponding shapes. In still other embodiments, fastener
- Figure 4 illustrates the assembly 10 in a locked configuration. Placing the first and second members 12, 14 in this locked configuration prevents the first and second members 12, 14 from rotating relative to each other about an axis of rotation Rj. To rotate the first and second members 12, 14 about axis Rf, the assembly IO may be placed in an unlocked 5 configuration as described below in more detail.
- the extension 24 of base 18 inserts into the opening 40 formed in the base 36.
- splines 22a and 22b engage and interlock with each oilier. Once engaged, the interlocking splines 22a, 22b prevent the relative rotation of the first and second members 12, 14.
- Fastener 44 inserts into opening 10 42 and is rotated about an. axis R* until fastener 44 engages second member .14. M a particular embodiment, fastener 44 inserts into opening 42 and is rotated about axis R? until the contact surface 46 engages the angled surface 30 of extension 24.
- the axis of rotation R2 is substantially perpendicular to the axis of rotation Ri. In other embodiments, the axis of rotation Ra is substantially non-parallel to die axis of rotation Rj.
- 0 fastener 44 is rotated about axis R2 such that contact surface 46 moves away from surface
- first and/or second members 12, 14 may be rotated relative to each other by rotating first and/or second bases 16, 34 about axis R t .
- Multiple openings 42 within the sidevval! of the base 36 provide additional options for locking the device. Positioning the members 12, 14 along the spine at the proper angle may result in one of the openings 42 being blocked. In this event, the fastener 44 may be inserted into a second opening 42 that is accessible. Additionally, more than one fastener 44 may be used for engagement with a different fastener 44 inserted within each of the openings 42.
- Figures 5-1.0 illustrate another embodiment of assembly 10.
- assembly 10 comprises the first and second members 12, 14, and ati end cap 50 coupled to assembly 1.0 using a mechanical, fastener 52.
- first and second members 12, 14 are selectively positional ⁇ e at a variety of angles to conform the first and second rods 16, 34 generally to the curvature of the patient's spine.
- FIGs 6-7 illustrate the first and second members 12. 14 in more detail.
- surface 20 comprises splines 22a formed as a plurality of alternating ridges and valleys that extend radially inward from a sidewall 56.
- Splines 22a are spaced inward from the sidewall 56 forming a generally flat edge surface 54a that extends around the periphery of base .1 S.
- Shaft 26 comprises a substantially cylindrical member that connects to and extends outward from surface 20, A threaded opening 5 S at one end of shaft 26 extends iato the shaft.26.
- the threaded opening 58 is formed io receive the mechanical fastener 52 that secures the end cap 50 to assembly 10.
- Shaft 26 also includes a tab 60 extending from its exterior sidewall .
- Tab 60 includes a ramped surface 64 that terminates at surface 62 that extends substantially perpendicular from the shaft 26.
- a stop 66 extends outward beyond the surface 62 and has oae or more opposing contact surfaces 68.
- tab 60 comprises part of the locking device that locks the position of the first and second members 12 ⁇ 14 at the desired orientation and may limit the angle through which the first and second members 12, 14 may rotate.
- second member 14 includes a surface 70 having splines 22b comprising a plurality of ridges and valleys that extend radially inward towards the center of base 36.
- the size and spacing of splines 22b corresponds generally to splines 22a.
- a generally flat edge surface 54b extends between splines 22b and the peripheral edge of base 36.
- Opening 74 with a notch 76 are formed in the surface 70, and opea into a receiving section 75. Opening 74 and notch 76 are sized to receive the shaft 26 aad the tab 60, respectively, when the first member 12 mates with the second member 14.
- One or more openings 78 are formed in a sidewall of the base 36 and extend into the receiving section 75. The openings 78 may be disposed at any desired position on the sidewall of base 36. As described hi more detail below, the fastener 44 extends through the opening 78 to lock the first and second members 12, 14.
- Figure 8 illustrates a ring 80 that fits within the receiving section 75 and extends around the shaft 26.
- Ring 80 is a. substantially cylindrical member that includes an outer sidewall S2 and an inner sidewall 84 thai form a cavity 86.
- a notch SS is formed on the inner sidewall 84 to receive the tab 60 extending from the shaft 26,
- An angled surface 90 slopes upward from a peripheral edge of the inner sidewaO S4 and is angled to correspond to the angle of the ramped surface 64. Angled surface 90 also extends around the inner circumference of the ring 80 from the notch SS to a stop surface 92.
- a threaded opening 94 extends through the ring into the cavity 86 and is sized to receive fastener 44.
- a stop surface 92 is formed at one end of the angled surface 90, Stop surface 92 contacts the stop 66 on the tab 60 to control the extent of relative rotati on of the first and second members i2 ? 14.
- the ramped surface 64 may slide along angled surface 90 until the contact surface 68 of the stop 66 engages the stop surface 92.
- the stop surface 92 may be .formed on the ring 80 at any position such that the first and second members 12., 14 may only rotate a predetermined distance in one direction to limit the rotation.
- Figure 9 illustrates a cross sectional view of the assembly 10.
- placing the first and second members 12. 14 in this locked configuration prevents the first and second members 12, 14 from rotating relative to each other about the axis of rotation R ⁇
- ting 80 is positioned within, the receiving section 75 with opening 94 in the ring aligning with the opening 78 in the base 36.
- An outer diameter of the ring 80 is smaller than an inner diameter of the receiving section 75 such that the flag 80 can move along axis Ri within the receiving section 75.
- the shaft 26 inserts Into tlie opening 74 with, the tab 60 aligni rig with the notch 76 in the opening and the notch SS in the ring 80.
- Fastener 44 is Initi ally inserted into openings 78, 94. Prior to tightening the fastener 44, first and second members 12, 14 are rotated to position the rods 16, 34, Once oriented, fastener 44 is tightened causing the ring SO to move along axis Rj within the receiving section 75 towards the fastener 44. This movement, in turn, causes the angled surface 90 on the ring 80 to contact and apply a locking force to the ramped surface 64 on the tab 60. Adjusting the fastener 44 within the openings 78, 94 adjusts the degree of the locking force and thus prevents further .rotation of the first and second members 12, 14.
- End cap 50 may be connected to assembly 10 using screw 52. End cap 50 is sized to extend across the receiving section 75, End cap 50 may further include a gasket to sealmgly engage the sidewalJ of the base 36 and seal the receiving section 75.
- Figure 10 illustrates another embodiment with a shaft 26 that terminates at a head 28. Both the shaft 26 and head 28 have a substantially constant width that form a 'T ! .
- Fastener 44 includes a contact surface 47 that engages the shaft 26 to lock the device 10. Contact surface 47 substantially matches the shaft 26 to increase the contact area.
- Fastener 44 may further be positioned for an. edge to contact the head 28 to farther lock the device 10, in one embodiment, the locking force is provided between trie contact surface 47 and the shaft. 26, In another embodiment, the locking force is provided between the edge of the fastener 44 and head 28.
- bases 18 and 36 may have other shapes and sizes, .Further, lhe shapes and sizes of the bases 18, 36 may be the same or may be different Likewise, the various openings may have different shapes and sizes to receive one or .more various sizes and/or types of fasteners.
- Rods 16 and 34 may have variety of lengths and diameters.
- the lengths and/or diameters of one or both of the rods 16, 34 may be the same or different
- one or both of the rods 16, 34 may be integrally formed with the sidewalls of their respective bases 16, 36, or formed separately aad attached to the sidewalls of their respective bases 18, 36.
- splines 22a, 22b may extend continuously around their respective bases 16» 34 or alternatively, may be formed in sections that are spaced apart along the surfaces of the first and second bases 18, 36.
- axes of rotation Rl and R2 are substantially perpendicular. Examples include the embodiment illustrated in Figures 4, 9, and 10, In ofher embodiments, however, the axes are aligned at a variety of angular orientations. Further, axis R2 may be aligned to be substantially parallel with one or both rods 16, 34. In other embodiments, axis R2 may be positioned in a non-parallel manner.
- a seal may be placed on one or both bases 1.8. 36 to sealingly engage the bases together in the locked configuration..
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006330689A AU2006330689B2 (en) | 2005-12-20 | 2006-12-13 | Vertebral rod assemblies and methods |
EP06840231.2A EP1973483B1 (en) | 2005-12-20 | 2006-12-13 | Vertebral rod assemblies |
JP2008547686A JP2009520577A (en) | 2005-12-20 | 2006-12-13 | Spinal rod assembly and method |
KR1020087017713A KR101341032B1 (en) | 2005-12-20 | 2006-12-13 | Vertebral rod assemblies and methods |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/313,000 US7517359B2 (en) | 2005-12-20 | 2005-12-20 | Vertebral rod assemblies and methods |
US11/313,000 | 2005-12-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007076265A1 true WO2007076265A1 (en) | 2007-07-05 |
Family
ID=37814357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2006/061998 WO2007076265A1 (en) | 2005-12-20 | 2006-12-13 | Vertebral rod assemblies and methods |
Country Status (6)
Country | Link |
---|---|
US (2) | US7517359B2 (en) |
EP (1) | EP1973483B1 (en) |
JP (1) | JP2009520577A (en) |
KR (1) | KR101341032B1 (en) |
AU (1) | AU2006330689B2 (en) |
WO (1) | WO2007076265A1 (en) |
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US7909852B2 (en) | 2004-03-31 | 2011-03-22 | Depuy Spine Sarl | Adjustable-angle spinal fixation element |
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- 2006-12-13 WO PCT/US2006/061998 patent/WO2007076265A1/en active Application Filing
- 2006-12-13 JP JP2008547686A patent/JP2009520577A/en active Pending
- 2006-12-13 KR KR1020087017713A patent/KR101341032B1/en active IP Right Grant
- 2006-12-13 AU AU2006330689A patent/AU2006330689B2/en not_active Ceased
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2009
- 2009-01-29 US US12/362,095 patent/US7901434B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
JP2009520577A (en) | 2009-05-28 |
US20070161988A1 (en) | 2007-07-12 |
EP1973483A1 (en) | 2008-10-01 |
KR101341032B1 (en) | 2013-12-12 |
EP1973483B1 (en) | 2019-04-03 |
AU2006330689A2 (en) | 2008-09-25 |
US7901434B2 (en) | 2011-03-08 |
US20090138049A1 (en) | 2009-05-28 |
KR20080087838A (en) | 2008-10-01 |
AU2006330689B2 (en) | 2012-02-09 |
US7517359B2 (en) | 2009-04-14 |
AU2006330689A1 (en) | 2007-07-05 |
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