WO2003041599A1 - Closure plug for open-headed medical implant - Google Patents
Closure plug for open-headed medical implant Download PDFInfo
- Publication number
- WO2003041599A1 WO2003041599A1 PCT/US2002/034457 US0234457W WO03041599A1 WO 2003041599 A1 WO2003041599 A1 WO 2003041599A1 US 0234457 W US0234457 W US 0234457W WO 03041599 A1 WO03041599 A1 WO 03041599A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- closure
- head
- implant
- tool
- break
- Prior art date
Links
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
- 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
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
- A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter
Definitions
- the body When the break-off head is broken away, the bores that adapted to mate with a removal tool become exposed.
- the body includes a central threaded bore that receives a set screw. The body is then used for capture of a rod or the like and the set screw is used to lock the rod or the like in position relative to the implant.
- a body includes both a break- off head and a central threaded bore that is covered by the break-off head until the head breaks away, after which the threaded bore is exposed at the top surface of the body to receive a set screw.
- FIG. 5 is a top plan view of the closure with the break-off head broken therefrom, but shown in phantom.
- Fig. 6 is a bottom plan view of the closure.
- Fig. 7 is an exploded and fragmentary side elevational view of the bone screw, rod and closure showing a removal tool positioned above the closure.
- Fig. 8 is a fragmentary and enlarged view of the bone screw, rod and closure shown in Fig. 7 with the removal tool inserted into the closure and with portions of the bone screw and closure broken away to show detail thereof .
- the threaded surface 40 is provided with a thread that is sized, shaped and configured to treatably mate with the threaded surfaces 26 and 27 of the arms 21 and 22, so that the closure body 35 may be threaded into the bone screw head, as is shown in Fig. 2.
- the closure body 35 also includes three bores 44, 45 and 46 that are aligned to be parallel with the axis of rotation.
- the bores 44, 45 and 46 are spaced both from the axis of rotation A and from a periphery 48 of a top 49 of the body.
- the bores 44, 45 and 46 extend from the body top 49 to a bottom surface 50 of the body 35 in the present embodiment.
- the break-off head 36 includes a neck 54 that joins with the body top 49 at a break-off location 56.
- the break-off location 56 is generally coplanar with the body top 49, so the break-off is clean and low profile.
- the break-off location is normally determined by the location whereat the neck 54 is smallest in cross-section or can be triggered by an external groove.
- the neck 54 also converges somewhat from the remainder of the break-off head 36 to the break- off location 56.
- the break-off head 36 includes a number of facets or panels which are aligned to be parallel to the axis of rotation A and which are joined together to form a polyhedral shape typically associated with a structure to be received in a socket-type tool.
- a combined surface 61 of the facets 60 forms such a polyhedral shape.
- a top surface 63 of the break-off head 36 has axially located therein a non-threaded bore 65 for operably receiving a tool during implantation.
- the bottom surface 50 of the body 35 includes a conical shaped and axially aligned point 67.
- a tool 70 is illustrated in Fig. 2 for cooperatively inserting the closure 6 into the bone screw head 13.
- a preselected torque is eventually reached (for example 90 inch pounds) where the break-off head 36 breaks from the closure body 35 at the break-off location 56 and separates therefrom, such as is shown in Figure 3.
- Figures 3 and 4 illustrate the closure 6 operably positioned within the bone screw head 13.
- Figure 5 illustrates the closure 6 with the break-off head 36 removed, but shown in phantom to illustrate the position of the break-off head 36 relative to the bores 44, 45 and 46.
- the implant 1 is typically a part of an overall system and is normally used to provide support to damaged, injured or missing vertebra of the spinal column.
- the tool 78 includes a shank 80 that has an axis of rotation during use that is coaxial with the axis of rotation A of the closure 6.
- the shank 80 is attached at one end to a handle 81 to provide a grasp and a means of turning the tool 78 by user.
- the shank 80 has a flat surface 83 from which three pegs or posts 84, 85 and 86 project.
- the posts 84, 85 and 86 are parallel to the axis of rotation of the tool 78 and are sized, shaped and positioned so as to be snugly receivable in the closure bores 44, 45 and 46, subsequent to removal of the break-off head 36.
- the tool 78 is shown in position above the closure body 35 in Figure 7 just prior to insertion of the posts 84, 85 and 86 into respective bores 44, 45 and 46.
- the tool 78 is shown positioned with the posts 84, 85 and 86 in the respective bores 44, 45 and 46 in Figure 8.
- the purpose of the tool ' 70 is to allow user to rotate the closure body 35 counter-clockwise and remove the body 35 from the bone screw head 13 after the closure 6 has been seated therein.
- the closure 106 has a generally cylindrical shaped body 135 that has a threaded radially outward surface 140 that has a thread thereon that is sized, shaped and positioned to threadedly mate with threads of the arm threaded surfaces 126 and 127, as seen in Figure 10.
- the thread can be a conventional V-thread, a buttress thread, a reverse angle thread or other threads related to reverse angle threads in that they exert forces to draw or pull the arms 121 and 122 toward one another rather than cause them to splay or open at the top.
- the body 135 also has a top surface 149 and a bottom surface 150.
- top surface 149 Positioned to extend downwardly into the body 135 form the top surface 149 are four equally spaced bores 151, 152, 153 and 154 that do not extend entirely through the body 135 from top to bottom.
- the bores 151, 152, 153 and 154 are spaced form and positioned between both a central axis B and a periphery 158 of the body top surface 149.
- Each bore 151, 152, 153 and 154 is positioned at approximately 90° relative to adjacent bores 151, 152, 153 and 154.
- Located axially and centrally in the body 135 is a threaded bore 161.
- the threaded bore 161 extends between the top surface 149 and bottom surface 150.
- the posts 186 extend form the surface 184 parallel to an axis of rotation of the tool 180 which is the same in use as the axis of rotation B of the closure.
- the posts 186 are aligned, sized and shaped to mate with the closure body bores 151, 152, 153 and 154.
- the tool shank 170 also includes an axial bore extending therethrough and receiving a keeper rod 190.
- the rod 190 has a threaded tip 191 that is adapted to be received in the closure body bore 161 and a grasping head
- the closure 106 may just be used to capture the rod 107 and the set screw 108 is used to lock the rod 107 in place.
- the tool 180 may be removed and the set screw 108 is then placed in the bore 161 and advanced against the rod 107. A preselected torque is applied to lock the rod 107 in a selected position in the head 112.
- the set screw 108 may be of other types than the one illustrated. That is the set screw could have a break-off head in which case the overall implant 101 would have a comparatively low profile associated with only the top of the bone screw.
- the installation process is reversed. That is the tool 180 is utilized to rotate the closure 106 counterclockwise rather than the clockwise ⁇ direction used for inserting.
- a body 235 thereof also includes a central or axial bore 260 extending from a bottom surface 250 upward through the body 235 to the level of an upper surface 249 of the body 235.
- the bore 260 is threaded and covered by the neck 254 until the break-off head 236 breaks form the body 235 during installation by application of torque, as was described in the first embodiment.
- the bore 260 is thereafter exposed upwardly or at the upper surface 249 and adapted to receive a set screw 263 of the type used in the second embodiment or alternatively a break-off type, as shown, set screw having removal slots 264. It is noted that the diameter of the neck 254 at the top surface 249 is larger than the diameter of the bore 260. It is to be understood that while certain forms of the present invention have been illustrated and described herein, it is not to be limited to the specific forms or arrangement of parts described and shown.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES02803168T ES2388135T3 (en) | 2001-11-09 | 2002-10-28 | Closing cap for medical implant with open head |
CA002466417A CA2466417C (en) | 2001-11-09 | 2002-10-28 | Closure plug for open-headed medical implant |
EP02803168A EP1450705B1 (en) | 2001-11-09 | 2002-10-28 | Closure plug for open-headed medical implant |
AU2002363787A AU2002363787B2 (en) | 2001-11-09 | 2002-10-28 | Closure plug for open-headed medical implant |
JP2003543487A JP2005508694A (en) | 2001-11-09 | 2002-10-28 | Closed body plug for open head medical implants |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/014,434 | 2001-11-09 | ||
US10/014,434 US6726687B2 (en) | 2000-12-08 | 2001-11-09 | Closure plug for open-headed medical implant |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003041599A1 true WO2003041599A1 (en) | 2003-05-22 |
Family
ID=21765468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/034457 WO2003041599A1 (en) | 2001-11-09 | 2002-10-28 | Closure plug for open-headed medical implant |
Country Status (7)
Country | Link |
---|---|
US (2) | US6726687B2 (en) |
EP (1) | EP1450705B1 (en) |
JP (2) | JP2005508694A (en) |
AU (1) | AU2002363787B2 (en) |
CA (1) | CA2466417C (en) |
ES (1) | ES2388135T3 (en) |
WO (1) | WO2003041599A1 (en) |
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US9161782B2 (en) | 2009-10-16 | 2015-10-20 | DePuy Synthes Products, Inc. | Bone anchor assemblies and methods of manufacturing and use thereof |
US9232968B2 (en) | 2007-12-19 | 2016-01-12 | DePuy Synthes Products, Inc. | Polymeric pedicle rods and methods of manufacturing |
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EP1811911A4 (en) * | 2004-11-10 | 2012-01-11 | Roger P Jackson | Helical guide and advancement flange with break-off extensions |
US9232968B2 (en) | 2007-12-19 | 2016-01-12 | DePuy Synthes Products, Inc. | Polymeric pedicle rods and methods of manufacturing |
US9161782B2 (en) | 2009-10-16 | 2015-10-20 | DePuy Synthes Products, Inc. | Bone anchor assemblies and methods of manufacturing and use thereof |
US9161745B2 (en) | 2011-10-05 | 2015-10-20 | Mark A. Dodson | Modular retractor and related method |
US10130349B2 (en) | 2011-10-05 | 2018-11-20 | Mark A. Dodson | Modular refractor and related method |
US10799228B2 (en) | 2011-10-05 | 2020-10-13 | Mark A. Dodson | Modular retractor and related method |
Also Published As
Publication number | Publication date |
---|---|
US6726687B2 (en) | 2004-04-27 |
AU2002363787B2 (en) | 2006-01-19 |
ES2388135T3 (en) | 2012-10-09 |
EP1450705B1 (en) | 2012-05-23 |
US20020072751A1 (en) | 2002-06-13 |
EP1450705A1 (en) | 2004-09-01 |
CA2466417A1 (en) | 2003-05-22 |
JP3135102U (en) | 2007-09-06 |
CA2466417C (en) | 2008-04-08 |
US7846187B2 (en) | 2010-12-07 |
US20040186478A1 (en) | 2004-09-23 |
EP1450705A4 (en) | 2008-04-30 |
JP2005508694A (en) | 2005-04-07 |
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