CA2555874A1 - Anti-splay medical implant closure with multi-surface removal aperture - Google Patents
Anti-splay medical implant closure with multi-surface removal aperture Download PDFInfo
- Publication number
- CA2555874A1 CA2555874A1 CA002555874A CA2555874A CA2555874A1 CA 2555874 A1 CA2555874 A1 CA 2555874A1 CA 002555874 A CA002555874 A CA 002555874A CA 2555874 A CA2555874 A CA 2555874A CA 2555874 A1 CA2555874 A1 CA 2555874A1
- Authority
- CA
- Canada
- Prior art keywords
- closure
- advancement
- splay
- structural member
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007943 implant Substances 0.000 title claims abstract 16
- 210000000988 bone and bone Anatomy 0.000 claims abstract 28
- 238000009434 installation Methods 0.000 claims abstract 22
- 230000013011 mating Effects 0.000 claims abstract 13
- 230000000295 complement effect Effects 0.000 claims abstract 4
- 150000001875 compounds Chemical class 0.000 claims 3
- 238000000926 separation method Methods 0.000 claims 3
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
- 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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0092—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a head engageable by two or more different tools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
- F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
- F16B35/044—Specially-shaped ends
- F16B35/047—Specially-shaped ends for preventing cross-threading, i.e. preventing skewing of bolt and nut
-
- 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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/003—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool star-shaped or multi-lobular, e.g. Torx-type, twelve-point star
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
Abstract
An anti-splay closure with a multi-surfaced aperture, such as a multi-lobular socket, includes a cylindrical body with an external, continuous, helically extending anti-splay guide and advancement flange and a breakaway installation head. The multi-lobular socket includes a plurality of circumferentiall-y spaced lobes extending parallel to a closure axis of the plug and which circumferentially alternate with spline receiving grooves extending parallel to the closure axis. The closure is used with an open headed bone implant screw having arms that are provided with internal, helically extending mating guide and advancement structures complementary to the body flange to allow slidable mating with the body upon rotation thereof and radial interlocking between the arms and the body.
Claims (20)
1. A closure for setting engagement with a structural member and comprising:
(a) a substantially cylindrical body having an outer cylindrical surface relative to a central closure axis;
(b) a substantially continuous guide and advancement flange extending helically about said outer cylindrical surface, said flange having a leading surface and a trailing surface relative to a direction of forward advancement;
(c) at least one of said leading surface or said trailing surface being compound in contour and including an inward facing anti-splay surface component facing generally toward said closure axis;
(d) said body having a multi-surface aperture formed therein that is aligned with said closure axis and that is elongated along said closure axis, said aperture opening onto a trailing surface of said body and including a plurality of circumferentially spaced, centrally facing surfaces extending substantially parallel to said closure axis that are aligned to form a removal socket adapted to receive a removal tool; and (e) a break off installation head.
(a) a substantially cylindrical body having an outer cylindrical surface relative to a central closure axis;
(b) a substantially continuous guide and advancement flange extending helically about said outer cylindrical surface, said flange having a leading surface and a trailing surface relative to a direction of forward advancement;
(c) at least one of said leading surface or said trailing surface being compound in contour and including an inward facing anti-splay surface component facing generally toward said closure axis;
(d) said body having a multi-surface aperture formed therein that is aligned with said closure axis and that is elongated along said closure axis, said aperture opening onto a trailing surface of said body and including a plurality of circumferentially spaced, centrally facing surfaces extending substantially parallel to said closure axis that are aligned to form a removal socket adapted to receive a removal tool; and (e) a break off installation head.
2. The closure as set forth in Claim 1 wherein said multi-surfaced aperture includes:
(a) a multi-lobular aperture elongated along said closure axis, said aperture including a plurality of circumferentially spaced lobes extending substantially parallel to said closure axis and facing generally toward said closure axis.
(a) a multi-lobular aperture elongated along said closure axis, said aperture including a plurality of circumferentially spaced lobes extending substantially parallel to said closure axis and facing generally toward said closure axis.
3. The closure as set forth in Claim 2 wherein:
(a) said lobes circumferentially alternate with grooves extending substantially parallel to said closure axis.
(a) said lobes circumferentially alternate with grooves extending substantially parallel to said closure axis.
4. The closure as set forth in Claim 1 and including:
(a) said installation head is shaped to enable non-slip engagement of said installation head by an installation tool; and (b) said installation head being connected to said closure by a breakaway region formed in such a manner that said breakaway region fails in response to a selected level of torque between said installation head and said closure to enable separation of said installation head from said body and to expose said removal socket.
(a) said installation head is shaped to enable non-slip engagement of said installation head by an installation tool; and (b) said installation head being connected to said closure by a breakaway region formed in such a manner that said breakaway region fails in response to a selected level of torque between said installation head and said closure to enable separation of said installation head from said body and to expose said removal socket.
5. The closure as set forth in Claim 1 and including:
(a) said body having a forward end relative to said forward advancement direction; and (b) said body having a V-shaped set ring formed on said forward end to enhance setting engagement of said body into a surface of a structural member.
(a) said body having a forward end relative to said forward advancement direction; and (b) said body having a V-shaped set ring formed on said forward end to enhance setting engagement of said body into a surface of a structural member.
6. The closure as set forth in Claim 1 in combination with a bone implant screw adapted for connection to a bone fixation structural member, said bone implant screw including:
(a) a threaded shank adapted for threaded implanting into a bone;
(b) an open head formed by a pair of spaced apart arms having mutually facing channel surfaces defining a structural member receiving channel to receive a bone fixation structural member;
and (c) said mutually facing channel surfaces having respective mating guide and advancement structures formed therein which are compatible with and rotatably mateable with said guide and advancement flange to enable guiding and advancement of said body into said channel to thereby clamp said bone fixation structural member therein and to interlock said body and arms.
(a) a threaded shank adapted for threaded implanting into a bone;
(b) an open head formed by a pair of spaced apart arms having mutually facing channel surfaces defining a structural member receiving channel to receive a bone fixation structural member;
and (c) said mutually facing channel surfaces having respective mating guide and advancement structures formed therein which are compatible with and rotatably mateable with said guide and advancement flange to enable guiding and advancement of said body into said channel to thereby clamp said bone fixation structural member therein and to interlock said body and arms.
7. The closure and bone implant screw combination as set forth in Claim 6 wherein:
(a) said mating guide and advancement structures of said bone implant screw include an outward anti-splay surface component which cooperates with said inward anti-splay surface component of said closure in such a manner as to resist a tendency of said arms to splay in reaction to torquing said closure into engagement with said bone fixation structural member.
(a) said mating guide and advancement structures of said bone implant screw include an outward anti-splay surface component which cooperates with said inward anti-splay surface component of said closure in such a manner as to resist a tendency of said arms to splay in reaction to torquing said closure into engagement with said bone fixation structural member.
8. The combination as set forth in Claim 7 wherein:
(a) said guide and advancement flange has a relatively enlarged region near an outer periphery thereof that forms said inward anti-splay surface component;
(b) said mating guide and advancement structures are contoured in a complementary manner to said guide and advancement flange to form said outward anti-splay surface component; and (c) said inward anti-splay surface component engages said outward anti-splay surface component when said closure is guided and advanced into said open screw head of said bone implant screw so as to interlock said body to said arms to resist radially outward splaying movement of said arms.
(a) said guide and advancement flange has a relatively enlarged region near an outer periphery thereof that forms said inward anti-splay surface component;
(b) said mating guide and advancement structures are contoured in a complementary manner to said guide and advancement flange to form said outward anti-splay surface component; and (c) said inward anti-splay surface component engages said outward anti-splay surface component when said closure is guided and advanced into said open screw head of said bone implant screw so as to interlock said body to said arms to resist radially outward splaying movement of said arms.
9. A closure for setting engagement with a structural member and comprising:
(a) a substantially cylindrical body having an outer cylindrical surface relative to a central closure axis;
(b) a guide and advancement flange extending helically about said outer cylindrical surface, said flange having a trailing surface relative to said forward advancement direction;
(c) said trailing surface being compound in contour and including an inward facing anti-splay surface component facing generally toward said closure axis;
(d) said body having a multi-lobular aperture formed therein which is aligned on and elongated along said closure axis, said aperture including a plurality of circumferentially spaced lobes extending substantially parallel to said closure axis and said lobes circumferentially alternating with bore grooves extending substantially parallel to said closure axis to form a removal socket adapted to receive a removal tool; and (e) a break off installation head.
(a) a substantially cylindrical body having an outer cylindrical surface relative to a central closure axis;
(b) a guide and advancement flange extending helically about said outer cylindrical surface, said flange having a trailing surface relative to said forward advancement direction;
(c) said trailing surface being compound in contour and including an inward facing anti-splay surface component facing generally toward said closure axis;
(d) said body having a multi-lobular aperture formed therein which is aligned on and elongated along said closure axis, said aperture including a plurality of circumferentially spaced lobes extending substantially parallel to said closure axis and said lobes circumferentially alternating with bore grooves extending substantially parallel to said closure axis to form a removal socket adapted to receive a removal tool; and (e) a break off installation head.
10. The closure as set forth in Claim 9 and including:
(a) said installation head being shaped to enable non-slip engagement of said installation head by an installation tool; and (b) said installation head being connected to said closure by a breakaway region formed in such a manner that said breakaway region fails in response to a selected level of torque between said installation head and said closure to enable separation of said installation head from said closure and to expose said aperture socket.
(a) said installation head being shaped to enable non-slip engagement of said installation head by an installation tool; and (b) said installation head being connected to said closure by a breakaway region formed in such a manner that said breakaway region fails in response to a selected level of torque between said installation head and said closure to enable separation of said installation head from said closure and to expose said aperture socket.
11. The closure as set forth in Claim 9 and including:
(a) said body having a forward end relative to a direction of forward advancement; and (b) said body having a V-shaped set ring formed on said forward end to enhance setting engagement of said body into a surface of a structural member.
(a) said body having a forward end relative to a direction of forward advancement; and (b) said body having a V-shaped set ring formed on said forward end to enhance setting engagement of said body into a surface of a structural member.
12. The closure as set forth in Claim 9 in combination with a bone implant screw adapted for connection to a bone fixation structural member, said bone implant screw including:
(a) a threaded shank adapted for threaded implanting into a bone;
(b) an open head formed by a pair of spaced apart arms having mutually facing channel surfaces defining a structural member receiving channel to receive a bone fixation structural member;
and (c) said mutually facing channel surfaces having an internal mating guide and advancement structures formed therein which are compatible for slidably mating with said flange upon rotation of said body to enable advancement of said body into said channel to thereby clamp said bone fixation structural member therein and to interlock said body to said arms to resist splaying of said arms.
(a) a threaded shank adapted for threaded implanting into a bone;
(b) an open head formed by a pair of spaced apart arms having mutually facing channel surfaces defining a structural member receiving channel to receive a bone fixation structural member;
and (c) said mutually facing channel surfaces having an internal mating guide and advancement structures formed therein which are compatible for slidably mating with said flange upon rotation of said body to enable advancement of said body into said channel to thereby clamp said bone fixation structural member therein and to interlock said body to said arms to resist splaying of said arms.
13. The closure and bone implant screw combination as set forth in Claim 12 wherein:
(a) said mating guide and advancement structures of said bone implant screw include an outward anti-splay surface component which cooperates with said inward anti-splay surface component of said flange in such a manner as to resist splaying of said arms.
(a) said mating guide and advancement structures of said bone implant screw include an outward anti-splay surface component which cooperates with said inward anti-splay surface component of said flange in such a manner as to resist splaying of said arms.
14. The combination as set forth in Claim 13 wherein:
(a) said flange has a relatively enlarged region near an outer periphery thereof that forms said inward anti-splay surface component;
(b) said mating guide and advancement structures are contoured in a complementary manner to said flange to form said outward anti-splay surface component; and (c) said inward anti-splay surface component engages said outward anti-splay surface component when said closure is rotated into said open screw head of said bone implant screw.
(a) said flange has a relatively enlarged region near an outer periphery thereof that forms said inward anti-splay surface component;
(b) said mating guide and advancement structures are contoured in a complementary manner to said flange to form said outward anti-splay surface component; and (c) said inward anti-splay surface component engages said outward anti-splay surface component when said closure is rotated into said open screw head of said bone implant screw.
15. A closure for setting engagement with a structural member and including a substantially cylindrical body having an outer cylindrical surface relative to a central closure axis and a substantially continuous guide and advancement flange extending helically about said outer cylindrical surface, said flange having a leading surface and a trailing surface relative to a direction of forward advancement, the improvement comprising:
(a) at least one of said leading surface and said trailing surface being compound in contour and including an inward facing anti-splay surface component facing generally toward said closure axis;
(b) said body having a multi-surfaced aperture formed therein which is located and elongated along said closure axis, said aperture including a plurality of circumferentially spaced surfaces extending substantially parallel to said closure axis so as to form a removal socket adapted to receive a removal tool; and (c) a break off installation head.
(a) at least one of said leading surface and said trailing surface being compound in contour and including an inward facing anti-splay surface component facing generally toward said closure axis;
(b) said body having a multi-surfaced aperture formed therein which is located and elongated along said closure axis, said aperture including a plurality of circumferentially spaced surfaces extending substantially parallel to said closure axis so as to form a removal socket adapted to receive a removal tool; and (c) a break off installation head.
16. The closure as set forth in Claim 15 wherein said multi-surfaced aperture is:
(a) a multi-lobular aperture elongated along said closure axis, said aperture including a plurality of circumferentially spaced lobes extending substantially parallel to said closure axis and said lobes circumferentially alternating with grooves extending substantially parallel to said closure axis.
(a) a multi-lobular aperture elongated along said closure axis, said aperture including a plurality of circumferentially spaced lobes extending substantially parallel to said closure axis and said lobes circumferentially alternating with grooves extending substantially parallel to said closure axis.
17. The closure as set forth in Claim 15 and including:
(a) said installation head being shaped to enable non-slip engagement of said installation head by an installation tool; and (b) said installation head being connected to said body by a breakaway region formed in such a manner that said breakaway region fails in response to a selected level of torque between said installation head and said body to enable separation of said installation head from said body.
(a) said installation head being shaped to enable non-slip engagement of said installation head by an installation tool; and (b) said installation head being connected to said body by a breakaway region formed in such a manner that said breakaway region fails in response to a selected level of torque between said installation head and said body to enable separation of said installation head from said body.
18. The closure as set forth in Claim 15 and including:
(a) said body having a forward end relative to said direction of forward advancement; and (b) said body having a V-shaped set ring formed on said forward end to enhance setting engagement of said body into a surface of such a structural member.
(a) said body having a forward end relative to said direction of forward advancement; and (b) said body having a V-shaped set ring formed on said forward end to enhance setting engagement of said body into a surface of such a structural member.
19. The closure as set forth in Claim 15 in combination with a bone implant screw adapted for connection to a bone fixation structural member, said bone implant screw including:
(a) a threaded shank adapted for threaded implanting into a bone;
(b) an open head formed by a pair of spaced apart arms having mutually facing channel surfaces defining a structural member receiving channel to receive a bone fixation structural member;
(c) said mutually facing channel surfaces having respective mating guide and advancement structures formed therein which are compatible to allow rotational mating with said guide and advancement flange to enable guiding and advancement of said body into said channel to thereby clamp said bone fixation structural member therein and to interlock said arms to said body to resist splaying of said arms; and (d) said mating guide and advancement structures of said bone implant screw including an outward anti-splay surface component which cooperates with said inward anti-splay surface component of said flange in such a manner as to resist a tendency of said arms to splay in reaction to torquing and other forces.
(a) a threaded shank adapted for threaded implanting into a bone;
(b) an open head formed by a pair of spaced apart arms having mutually facing channel surfaces defining a structural member receiving channel to receive a bone fixation structural member;
(c) said mutually facing channel surfaces having respective mating guide and advancement structures formed therein which are compatible to allow rotational mating with said guide and advancement flange to enable guiding and advancement of said body into said channel to thereby clamp said bone fixation structural member therein and to interlock said arms to said body to resist splaying of said arms; and (d) said mating guide and advancement structures of said bone implant screw including an outward anti-splay surface component which cooperates with said inward anti-splay surface component of said flange in such a manner as to resist a tendency of said arms to splay in reaction to torquing and other forces.
20. The combination as set forth in Claim 19 wherein:
(a) said guide and advancement flange has a relatively enlarged region near an outer periphery thereof that forms said inward anti-splay surface component;
(b) said mating guide and advancement structures are contoured in a complementary manner to said guide and advancement flange to form said outward anti-splay surface component; and (c) said inward anti-splay surface component engages said outward anti-splay surface component when said closure is guided and advanced into said open screw head of said bone implant screw so as to radially interlock.
(a) said guide and advancement flange has a relatively enlarged region near an outer periphery thereof that forms said inward anti-splay surface component;
(b) said mating guide and advancement structures are contoured in a complementary manner to said guide and advancement flange to form said outward anti-splay surface component; and (c) said inward anti-splay surface component engages said outward anti-splay surface component when said closure is guided and advanced into said open screw head of said bone implant screw so as to radially interlock.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/783,889 US8282673B2 (en) | 2002-09-06 | 2004-02-20 | Anti-splay medical implant closure with multi-surface removal aperture |
US10/783,889 | 2004-02-20 | ||
PCT/US2004/031862 WO2005081689A2 (en) | 2004-02-20 | 2004-09-29 | Anti-splay medical implant closure with removal aperture |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2555874A1 true CA2555874A1 (en) | 2005-09-09 |
CA2555874C CA2555874C (en) | 2010-07-27 |
Family
ID=34911410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2555874A Expired - Fee Related CA2555874C (en) | 2004-02-20 | 2004-09-29 | Anti-splay medical implant closure with multi-surface removal aperture |
Country Status (6)
Country | Link |
---|---|
US (4) | US8282673B2 (en) |
EP (1) | EP1715797A4 (en) |
JP (1) | JP4510032B2 (en) |
AU (1) | AU2004316268C1 (en) |
CA (1) | CA2555874C (en) |
WO (1) | WO2005081689A2 (en) |
Families Citing this family (89)
Publication number | Priority date | Publication date | Assignee | Title |
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US7833250B2 (en) | 2004-11-10 | 2010-11-16 | Jackson Roger P | Polyaxial bone screw with helically wound capture connection |
US20060025771A1 (en) * | 2000-08-23 | 2006-02-02 | Jackson Roger P | Helical reverse angle guide and advancement structure with break-off extensions |
US6726689B2 (en) | 2002-09-06 | 2004-04-27 | Roger P. Jackson | Helical interlocking mating guide and advancement structure |
US8377100B2 (en) | 2000-12-08 | 2013-02-19 | Roger P. Jackson | Closure for open-headed medical implant |
US10729469B2 (en) | 2006-01-09 | 2020-08-04 | Roger P. Jackson | Flexible spinal stabilization assembly with spacer having off-axis core member |
US10258382B2 (en) | 2007-01-18 | 2019-04-16 | Roger P. Jackson | Rod-cord dynamic connection assemblies with slidable bone anchor attachment members along the cord |
US20160242816A9 (en) * | 2001-05-09 | 2016-08-25 | Roger P. Jackson | Dynamic spinal stabilization assembly with elastic bumpers and locking limited travel closure mechanisms |
US7862587B2 (en) | 2004-02-27 | 2011-01-04 | Jackson Roger P | Dynamic stabilization assemblies, tool set and method |
US11224464B2 (en) | 2002-05-09 | 2022-01-18 | Roger P. Jackson | Threaded closure with inwardly-facing tool engaging concave radiused structures and axial through-aperture |
US8257402B2 (en) | 2002-09-06 | 2012-09-04 | Jackson Roger P | Closure for rod receiving orthopedic implant having left handed thread removal |
US8282673B2 (en) | 2002-09-06 | 2012-10-09 | Jackson Roger P | Anti-splay medical implant closure with multi-surface removal aperture |
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-
2004
- 2004-02-20 US US10/783,889 patent/US8282673B2/en not_active Expired - Lifetime
- 2004-09-29 CA CA2555874A patent/CA2555874C/en not_active Expired - Fee Related
- 2004-09-29 WO PCT/US2004/031862 patent/WO2005081689A2/en active Application Filing
- 2004-09-29 EP EP04789192A patent/EP1715797A4/en not_active Withdrawn
- 2004-09-29 AU AU2004316268A patent/AU2004316268C1/en not_active Ceased
- 2004-09-29 JP JP2006554081A patent/JP4510032B2/en not_active Expired - Fee Related
-
2007
- 2007-10-05 US US11/973,155 patent/US8128667B2/en active Active
-
2012
- 2012-08-02 US US13/507,854 patent/US8591552B2/en not_active Expired - Lifetime
-
2013
- 2013-11-21 US US14/086,204 patent/US20140081335A1/en not_active Abandoned
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US20080039848A1 (en) | 2008-02-14 |
AU2004316268C1 (en) | 2008-12-04 |
AU2004316268A1 (en) | 2005-09-09 |
US8128667B2 (en) | 2012-03-06 |
WO2005081689A3 (en) | 2005-12-01 |
JP4510032B2 (en) | 2010-07-21 |
EP1715797A2 (en) | 2006-11-02 |
AU2004316268B2 (en) | 2008-05-22 |
EP1715797A4 (en) | 2010-09-29 |
US20040172032A1 (en) | 2004-09-02 |
US20140081335A1 (en) | 2014-03-20 |
WO2005081689A2 (en) | 2005-09-09 |
US8282673B2 (en) | 2012-10-09 |
JP2007522870A (en) | 2007-08-16 |
CA2555874C (en) | 2010-07-27 |
US20120310286A1 (en) | 2012-12-06 |
US8591552B2 (en) | 2013-11-26 |
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