WO2007142226A1 - 棘突起スペーサ - Google Patents
棘突起スペーサ Download PDFInfo
- Publication number
- WO2007142226A1 WO2007142226A1 PCT/JP2007/061350 JP2007061350W WO2007142226A1 WO 2007142226 A1 WO2007142226 A1 WO 2007142226A1 JP 2007061350 W JP2007061350 W JP 2007061350W WO 2007142226 A1 WO2007142226 A1 WO 2007142226A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spinous process
- process spacer
- spinous
- angle
- spacer
- 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
-
- 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
- A61B17/7071—Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; Tools therefor
Definitions
- the present invention relates to a spinous process spacer inserted between divided spinous processes obtained by dividing a spinous process of a cervical spine vertically.
- Patent Document 1 As a spinous process spacer used in this spinous process vertical splitting method, in Patent Document 1, there are two cross-sections (horizontal cross section and longitudinal forehead cross section) orthogonal to each other? Also disclosed is a block-shaped spinous process spacer formed in a substantially trapezoidal shape.
- the spinous process vertical splitting method is a method in which the spinous processes are vertically split and the gaps between the formed spinous processes are expanded to insert the spinous process spacers.
- the gap formed between the split spinous processes by being expanded is not a parallel gap due to the internal stress, because the spinous process itself has a non-uniform cross-sectional shape. It narrows and widens outward, and widens on the head side and narrows on the caudal side.
- the spinous process spacer disclosed in Patent Document 1 has a block-like shape in which two orthogonal vertical cross sections are both formed in a substantially trapezoidal shape in order to adapt to such a gap extending in two vertical and horizontal directions. Adopted.
- Patent Document 1 Patent No. 3660696 Specification
- the gap between the divided spinous processes is based on the cross-sectional shape of the spinous processes.
- the opening angle varies from person to person because it is determined by the internal stress balance. That is, even if the horizontal opening angle is the same, the vertical opening angle varies from patient to patient. Therefore, as shown in Patent Document 1, even if a spinous process spacer having a substantially trapezoidal longitudinal section in each of two orthogonal directions is used, the same spinous process spacer is used for all patients. It does n’t mean that SA fits.
- the present invention has been made in view of the above-described circumstances, and can be stably inserted and fixed without a gap between the divided surfaces of the divided spinous processes, which are made to order for each patient. Speak for the purpose of providing a spacer!
- the present invention provides the following means.
- one aspect of the present invention is a spinous protrusion spacer that is inserted between divided spinous processes in which the spinous processes are vertically divided, and is formed in a substantially cylindrical shape, and is flat with both end surfaces forming a constant angle. It is a spinous process spacer composed of faces.
- the split planes are not changed regardless of the spread angle in the vertical and horizontal directions.
- the intersecting line There is no change in the two planes intersecting with one straight line (hereinafter referred to as the intersecting line) at any position on the extension.
- the angle formed by the two split surfaces is defined as an angle within a plane perpendicular to the intersecting line (hereinafter referred to as a reference plane).
- the dividing surface does not spread in the vertical direction but has only a spread angle in the horizontal direction
- the crossing line is maintained in the vertical direction. However, if the dividing plane expands in the vertical direction, the intersection line falls down, so the reference plane orthogonal to the intersection line also rotates by the same angle. As a result of this rotation, the angle formed by the two split surfaces increases as the vertical spread increases.
- the spinous process spacer according to the above aspect is configured by planes having substantially cylindrical end surfaces that are at a fixed angle with each other, so that the both end surfaces are inclined by rotating around the central axis.
- the angle formed by the dividing plane can be made to coincide with the direction of inclination of the dividing plane, and by narrowing the spread in the horizontal direction by the amount increased by the vertical force S of the dividing plane. Can be made to coincide with the angle formed by both end faces of the spinous process spacer.
- all patients can be adjusted by adjusting the rotation angle around the center axis and adjusting the lateral spread in accordance with the variation in the spread angle in the vertical direction of the dividing plane due to individual differences among patients.
- the end surface can be brought into close contact with the split surface of the split spinous process.
- the spinous process spacer according to the above aspect can be applied to all patients who do not need to be made to order for each patient.
- the shape can be made very simple and can be manufactured at a very low cost.
- the spinous process spacer according to the above aspect is formed in a substantially cylindrical shape, the position of the outer peripheral surface is hardly changed even if it is rotated around its central axis. Therefore, the spinous process spacer can avoid the interference with the spinous process of the adjacent cervical spine and the spinous process spacer fixed thereto.
- the spinous process spacer according to the above aspect has a substantially mirror-symmetrical shape with respect to a plane passing through the center in the longitudinal direction and orthogonal to the central axis.
- Two split spinous processes formed by vertically dividing the spinous processes are configured almost symmetrically, and are inclined almost symmetrically by widening the gap. Therefore, the end surfaces are brought into close contact with the split surfaces of both split spinous processes by configuring the spinous process spacers to be substantially mirror-symmetrical about a plane passing through the center in the longitudinal direction and perpendicular to the central axis. Can do.
- the outer peripheral surface is provided with an engaging portion that engages a tool in order to increase the rotational force around the axis.
- both end surfaces can be adjusted to be in close contact with the divided surface by rotating around the central axis while being inserted in the gap between the divided surfaces of the divided spinous processes. Therefore, by engaging the tool with the engaging portion provided on the outer peripheral surface, the spinous process spacer can be easily rotated around the axis, and the adjustment operation can be facilitated.
- the engaging portion may be configured by two planes extending in parallel with each other along the axis.
- a general-purpose tool such as a spanner can be arranged so as to sandwich the two planes provided as the engaging portions, and the spinous process spacer can be easily rotated around the axis.
- both end surface forces may be provided at an angle of 30 ° or more and 90 ° or less.
- An angle in the above range is a suitable force as the spread angle between the split surfaces of the split spinous process for enlarging the spinal canal.
- the spinous process spacer according to the above aspect is preferably made of a biocompatible ceramic material.
- FIG. 1 is a perspective view showing a spinous process spacer according to an embodiment of the present invention.
- FIG. 2 is a plan view of the spinous process spacer of FIG. 1.
- FIG. 3 is a side view of the spinous process spacer of FIG. 1.
- FIG. 4 is a front view of the spinous process spacer of FIG. 1.
- FIG. 5 is a schematic view for explaining the action of the spinous process spacer of FIG. 1.
- FIG. 6 is a perspective view showing a first modification of the spinous process spacer of FIG. 1.
- FIG. 7 is a perspective view showing a second modification of the spinous process spacer of FIG. 1.
- FIG. 8 is a perspective view showing a third modification of the spinous process spacer of FIG. 1.
- FIG. 9 is a diagram for explaining the action when the spinous process spacer of FIG. 8 is rotated around the axis.
- FIG. 10A is a cross-sectional view showing a cross-sectional shape of another modification of the spinous process spacer of FIG. 1.
- 10B is a cross-sectional view showing a cross-sectional shape of another modification of the spinous process spacer of FIG. 1.
- FIG. 10C is a cross-sectional view showing a cross-sectional shape of another modification of the spinous process spacer of FIG. 1.
- 10D is a cross-sectional view showing a cross-sectional shape of another modification of the spinous process spacer of FIG. 1.
- 10E is a cross-sectional view showing a cross-sectional shape of another modification of the spinous process spacer of FIG. 1.
- FIG. 11 is a perspective view showing another modification of the spinous process spacer of FIG. 1.
- the spinous process spacer 1 is formed of a columnar calcium phosphate, and both end surfaces 2 and 3 thereof are inclined with respect to the central axis A. ing
- the both end faces 2 and 3 are configured by planes inclined in the opposite direction with respect to the central axis A by the same angle.
- the spinous process spacer 1 according to the present embodiment is mirror-symmetric with respect to a plane B that passes through the center in the longitudinal direction and is orthogonal to the central axis A.
- the angle ⁇ formed by the two end faces 2 and 3 is set to one selected angle, for example, a range force of 30 ° or more and 90 ° or less.
- the spinous process spacer 1 has a trapezoidal cross-sectional shape extending in one direction when viewed from the direction of FIG. 2, as shown in FIGS.
- the cross-sectional shape in the other direction is not the trapezoidal shape! ,.
- the spinous process spacer 1 according to the present embodiment is provided with through holes 4 that extend in the longitudinal direction and open to both end faces 2 and 3.
- the through-hole 4 is used, for example, when the spinous process spacer 1 inserted between the divided spinous processes is sutured to the divided spinous processes.
- intersection line L is at an angle ⁇ with respect to the intersection line L
- the reference plane ⁇ that is perpendicular to this also rotates by the same angle ⁇ .
- the angle ⁇ formed by the divided planes A and B is defined as an angle on the reference plane ⁇ .
- the spread angle ⁇ is larger than the spread angle ⁇ when spread only in the lateral direction.
- the gap on the wedge will be formed between the end faces 2, 3 and the split faces A, B.
- the angle ⁇ between the split surfaces A and B can be made to coincide.
- the spinous process spacer 1 is inserted by pushing and expanding against the elastic restoring force of the split spinous processes.
- the inclination direction can be matched with the reference plane P of the dividing planes A and B.
- the split spinous process is automatically expanded by its elastic restoring force and pushed back in the direction of decreasing the angle ⁇ 2, and settles at the position where the divided surfaces A and B and the two end surfaces 2 and 3 are in close contact.
- the longitudinal spread angle j8 The spinous process spacer 1 is rotated around its central axis A so that the inclined directions of both end faces 2 and 3 coincide with the reference plane P of the dividing planes A and B, and Dividing plane
- split surfaces A and B of the split spinous process can be brought into close contact with each other without any gap.
- the spinous process spacer 1 can be stably inserted and fixed between the divided spinous processes, and the occurrence of deviation over time can be prevented. Can be stopped.
- the same spinous process spacer 1 can be used for all patients who do not need to manufacture the spinous process spacer 1 for each patient. 1 can be applied. As a result, mass production becomes possible, and the cost can be reduced, and an extremely simple shape can be adopted, so that the manufacturing cost can be greatly reduced.
- the spinous process spacer 1 since the spinous process spacer 1 according to the present embodiment is formed in a columnar shape, the position of the outer peripheral surface can be almost changed when the spinous process spacer 1 is rotated around its central axis A. Absent. Therefore, even if the spinous process spacer 1 is rotated around its central axis A in order to cope with the vertical spread angle j8 that varies depending on individual differences, its outer peripheral surface protrudes outward from the divided spinous process. There is no possibility of touching the spinal cord. Therefore, there is an advantage that the spinous protrusion spacer 1 can be prevented from interfering with the adjacent spinous processes and other spinous processes spacers 1 fixed to the spinous processes.
- the spinous process spacer 1 is configured in a simple substantially cylindrical shape, instead of this, as shown in Fig. 6, two parallel extending along the central axis A are provided.
- the flat surfaces 5 and 6 may be provided on the outer peripheral surface.
- the spinous process spacer 1 can be easily rotated around the central axis A by sandwiching the two planes 5 and 6 with a general-purpose tool such as a spanner (not shown).
- the engaging portion provided on the outer peripheral surface of the spinous process spacer 1 is not limited to the two planes 5 and 6, and can adopt any form that can be engaged with a general-purpose tool or a special tool.
- the spinous process spacer 1 is configured in a simple substantially cylindrical shape. Instead, as shown in FIG. 7, it may be configured in a columnar shape having a plurality of planes 7 over the entire length in the longitudinal direction. Further, if the outer peripheral surface is rotated around the central axis A so that the outer peripheral surface does not protrude beyond the split surface force of the spinous process, it may be formed in a polygonal column shape, not limited to a cylindrical shape.
- the spinous process spacer 1 is a substantially cylindrical spinous process spacer 1 having a polygonal column force having five or more corners convex outward in the radial direction. Spacer 1 may be used.
- the force shown by the spinous process spacer 1 composed of a hexagonal column is not limited to this, and may be configured as a pentagonal column or a column shape of seven or more corners
- a broken line C shows a cross-sectional shape in the case of a regular quadrangular prism, and comes into contact with an adjacent spinous process spacer by rotation.
- a columnar shape having a cross-sectional shape such that the outer peripheral surface does not protrude only within a rotation angle range in which the spinous process spacer 1 is rotated around the central axis ⁇ ⁇ ⁇ ⁇ It has an outer peripheral shape! /!
- a substantially columnar spinous process spacer 1 having an arbitrary cross-sectional shape including one or more corners and a cylindrical surface may be employed.
- the through-hole 4 for stitching is provided at one place along the central axis A, but it may be provided at a plurality of places! / Needless to say!
- a notch 8 may be partially formed at that site.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/303,345 US20090198278A1 (en) | 2006-06-07 | 2007-06-05 | Spinous process spacer |
EP07744705A EP2025307A1 (en) | 2006-06-07 | 2007-06-05 | Spinous process spacer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006158437A JP2007167621A (ja) | 2005-11-24 | 2006-06-07 | 棘突起スペーサ |
JP2006-158437 | 2006-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007142226A1 true WO2007142226A1 (ja) | 2007-12-13 |
Family
ID=38801477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/061350 WO2007142226A1 (ja) | 2006-06-07 | 2007-06-05 | 棘突起スペーサ |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090198278A1 (ja) |
EP (1) | EP2025307A1 (ja) |
JP (1) | JP2007167621A (ja) |
KR (1) | KR20090015924A (ja) |
CN (1) | CN101460117A (ja) |
WO (1) | WO2007142226A1 (ja) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9055981B2 (en) | 2004-10-25 | 2015-06-16 | Lanx, Inc. | Spinal implants and methods |
US8241330B2 (en) | 2007-01-11 | 2012-08-14 | Lanx, Inc. | Spinous process implants and associated methods |
US9265532B2 (en) | 2007-01-11 | 2016-02-23 | Lanx, Inc. | Interspinous implants and methods |
JP5197979B2 (ja) * | 2007-03-29 | 2013-05-15 | タキロン株式会社 | 椎弓拡大用ピン |
WO2010114925A1 (en) | 2009-03-31 | 2010-10-07 | Lanx, Inc. | Spinous process implants and associated methods |
US9351781B2 (en) | 2011-04-12 | 2016-05-31 | Aesculap Ag | Surgical procedure for expanding a vertebral canal |
DE102011001996A1 (de) * | 2011-04-12 | 2012-10-18 | Aesculap Ag | Chirurgisches Implantat zum Erweitern eines Wirbelkanals |
US11812923B2 (en) | 2011-10-07 | 2023-11-14 | Alan Villavicencio | Spinal fixation device |
ITPI20120106A1 (it) * | 2012-10-19 | 2014-04-20 | Giancarlo Guizzardi | Dispositivo e sistema per artrodesi vertebrale |
US9757248B2 (en) | 2014-04-08 | 2017-09-12 | Degen Medical, Inc. | Intervertebral spacers |
US10258483B2 (en) | 2016-08-19 | 2019-04-16 | Degen Medical, Inc. | Laminate implantable medical devices |
JP6871769B2 (ja) * | 2017-03-16 | 2021-05-12 | オリンパステルモバイオマテリアル株式会社 | 椎弓スペーサおよび椎弓スペーサキット |
US11801144B2 (en) | 2017-09-14 | 2023-10-31 | Degen Medical, Inc. | Methods of making medical devices |
US11123198B2 (en) | 2018-11-13 | 2021-09-21 | Degen Medical, Inc. | Expandable spacers |
US11234829B2 (en) | 2019-01-21 | 2022-02-01 | Degen Medical, Inc. | Expandable intervertebral spacers |
US11547575B2 (en) | 2019-09-27 | 2023-01-10 | Degen Medical, Inc. | Expandable intervertebral spacers |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005011539A2 (en) * | 2003-08-01 | 2005-02-10 | Abbott Laboratories | Spinal implant |
JP3660696B2 (ja) | 1994-06-27 | 2005-06-15 | ペンタックス株式会社 | 棘突起スペーサ |
JP2006503673A (ja) * | 2002-10-28 | 2006-02-02 | エスディージーアイ・ホールディングス・インコーポレーテッド | 一対の整形外科用ロッドを相互接続するための交差コネクタアッセンブリ |
JP2006136734A (ja) * | 2005-12-19 | 2006-06-01 | Toshikatsu Mamada | 棘突起スペーサー |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0669484B2 (ja) * | 1990-09-05 | 1994-09-07 | エルソルプロダクツ株式会社 | 人工骨とその製造方法、並びに人工骨用セラミックス |
CN1156255C (zh) * | 1993-10-01 | 2004-07-07 | 美商-艾克罗米德公司 | 脊椎植入物 |
US7101375B2 (en) * | 1997-01-02 | 2006-09-05 | St. Francis Medical Technologies, Inc. | Spine distraction implant |
DE69916280T2 (de) * | 1998-08-03 | 2005-05-25 | Synthes Ag Chur, Chur | Zwischenwirbel-allotransplantat-distanzstück |
US20030045935A1 (en) * | 2001-02-28 | 2003-03-06 | Angelucci Christopher M. | Laminoplasty implants and methods of use |
JP3889649B2 (ja) * | 2002-03-28 | 2007-03-07 | 敏且 侭田 | 棘突起スペーサー |
US6712852B1 (en) * | 2002-09-30 | 2004-03-30 | Depuy Spine, Inc. | Laminoplasty cage |
WO2004100840A1 (ja) * | 2003-05-16 | 2004-11-25 | Pentax Corporation | 棘間スペーサ |
-
2006
- 2006-06-07 JP JP2006158437A patent/JP2007167621A/ja active Pending
-
2007
- 2007-06-05 EP EP07744705A patent/EP2025307A1/en not_active Withdrawn
- 2007-06-05 CN CNA2007800206356A patent/CN101460117A/zh active Pending
- 2007-06-05 KR KR1020087027972A patent/KR20090015924A/ko not_active Application Discontinuation
- 2007-06-05 WO PCT/JP2007/061350 patent/WO2007142226A1/ja active Application Filing
- 2007-06-05 US US12/303,345 patent/US20090198278A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3660696B2 (ja) | 1994-06-27 | 2005-06-15 | ペンタックス株式会社 | 棘突起スペーサ |
JP2006503673A (ja) * | 2002-10-28 | 2006-02-02 | エスディージーアイ・ホールディングス・インコーポレーテッド | 一対の整形外科用ロッドを相互接続するための交差コネクタアッセンブリ |
WO2005011539A2 (en) * | 2003-08-01 | 2005-02-10 | Abbott Laboratories | Spinal implant |
JP2006136734A (ja) * | 2005-12-19 | 2006-06-01 | Toshikatsu Mamada | 棘突起スペーサー |
Also Published As
Publication number | Publication date |
---|---|
US20090198278A1 (en) | 2009-08-06 |
KR20090015924A (ko) | 2009-02-12 |
CN101460117A (zh) | 2009-06-17 |
EP2025307A1 (en) | 2009-02-18 |
JP2007167621A (ja) | 2007-07-05 |
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