EP0959794A1 - Screw for insertion into a bone and tool for removing this screw - Google Patents
Screw for insertion into a bone and tool for removing this screwInfo
- Publication number
- EP0959794A1 EP0959794A1 EP97914109A EP97914109A EP0959794A1 EP 0959794 A1 EP0959794 A1 EP 0959794A1 EP 97914109 A EP97914109 A EP 97914109A EP 97914109 A EP97914109 A EP 97914109A EP 0959794 A1 EP0959794 A1 EP 0959794A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- head
- screw body
- bone
- tool
- 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.)
- Withdrawn
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 23
- 238000003780 insertion Methods 0.000 title claims abstract description 8
- 230000037431 insertion Effects 0.000 title claims abstract description 8
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000003801 milling Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000003716 rejuvenation Effects 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
-
- 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8875—Screwdrivers, spanners or wrenches
- A61B17/8877—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit
-
- 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
-
- 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
-
- 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
- Screw for insertion into a bone and unscrewing tool therefor
- the invention relates to a screw for insertion into a bone, in particular for fastening plates that support the fixing of bone parts, with a screw body that has a threaded section and an indirectly or directly adjoining head, on which a device for screwing the screw body into the bones is provided.
- the invention further relates to a boring tool for such a screw or its screw body.
- Bone screws are very small, with a head size that is usually less than 5 mm
- a flat slot or a cross slot for screwing the screw into the bone.
- Such screws are mainly used to fasten plates that support the fixation of bone parts.
- the very flat design means that the slot or the cross slot for screwing in or out the screw can only be very flat. Not only does this mean that the tool for manipulating the screw is very difficult to apply, there is also a risk that the blade of the tool will slip and cause damage.
- the screw according to the invention is characterized in that the device for screwing in the screw body is a shaft formed in one piece with the head, at least one predetermined breaking point being formed in the connection area between the head and the shaft. Screw body and insertion tool are thus initially available as one unit. This unit can be screwed into the bone using a suitable rotary drive with low speeds. After the screw-in depth has been reached, the torque acting on the predetermined breaking point increases so much that the screw body breaks off the shaft and is thus placed in the bone.
- the at least one predetermined breaking point therefore advantageously defines a surface which is dimensioned in accordance with a desired maximum tightening torque of the screw.
- the size of such an area can be determined by experiments, possibly also depending on the choice of material.
- the screw body has a web on the head to which the shaft is connected.
- the predetermined breaking point is located on the side of the web facing the shaft.
- Such a web which is expediently designed as a central web, can be produced by immersing a milling cutter on two sides, offset from the central axis of the screw body, which leaves the desired web straight.
- the unscrewing tool for such a screw or its screw body is then characterized in that a slot is provided at a free end of the unscrewing tool body, which slot is dimensioned such that it engages the head of the screw body via a coupling section, for example the web.
- the boring tool has a shape in the area of the slot in such a way that lugs defining the slot lie snugly in notches which are formed on both sides of the web in the head of the screw body.
- Figure 1 is a side view of a screw for insertion into a bone according to an embodiment of the present invention
- FIG. 2 shows a sectional view through the screw in the area of her head
- Figure 3 is a plan view of the head, with the shaft broken away;
- Figure 4 is a side view, partially in longitudinal section, of the boring tool for a screw or its screw body according to the invention.
- FIG. 5 shows a side view of the boring tool rotated by 90 ° in relation to FIG. 4, again partially cut away.
- FIG. 1 shows a side view of a screw according to the invention for insertion into a bone.
- the screw consists of a screw body 10 and a screw-in tool 20, which are integrally formed with one another, a predetermined breaking point 28 being defined in the connection area between screw body 10 and screw-in tool 20.
- the screw body 10 consists in the usual way of a threaded section 12 and a head 14 directly or indirectly adjoining it.
- the screwing tool 20 is formed from an elongated shaft 22 which extends in the direction of the head 14 of the screw body 10 over a certain section 24 rejuvenated. At the end of shaft 22 opposite section 24, a coupling part 26 is provided for an angle piece or the like.
- Figure 2 shows a longitudinal sectional view of the head 14 of the screw body 10.
- the central axis and notches 18 set apart from this, for example by means of a corresponding milling tool, so that a web 16 remains within the head 14, on its exposed surface, as can be seen directly in FIG. 3, the predetermined breaking point 28 is provided.
- the predetermined breaking point is shown in FIG. 3 as a circular surface, but other surface shapes and thus surface sizes are also possible, so that the desired maximum tightening torque for the screw in the bone can be determined via the dimension of this surface.
- the screwing tool 20 breaks off at the tapered section 24 or at the predetermined breaking point 28 from the web 16 of the screw body 10 .
- an unscrewing tool is expediently used, as is shown in partial side views in FIGS. 4 and 5. It is essential for the boring tool 30 that a slot 34 is formed at the free end of the boring tool body 32, which can be seen particularly well in the partially cut-away area of FIG. 5, the slot 34 being dimensioned such that it overlaps engages the web 16 in the head 14 of the screw body 10. To a fuller. To ensure the fit of the boring tool 30 in the head 14, lugs 36 are formed on both sides of the slot so that they lie essentially in a positive manner in the notches 18 in the head 14 of the screw body 10.
- the unscrewing tool 30, like the screwing-in tool 20, can be provided with a coupling part for an angle piece.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Mechanical Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurology (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19603410A DE19603410C2 (en) | 1996-01-31 | 1996-01-31 | Screw for insertion into a bone and unscrewing tool therefor |
DE19603410 | 1996-01-31 | ||
PCT/DE1997/000195 WO1997027812A1 (en) | 1996-01-31 | 1997-01-28 | Screw for insertion into a bone and tool for removing this screw |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0959794A1 true EP0959794A1 (en) | 1999-12-01 |
Family
ID=7784125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97914109A Withdrawn EP0959794A1 (en) | 1996-01-31 | 1997-01-28 | Screw for insertion into a bone and tool for removing this screw |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0959794A1 (en) |
JP (1) | JP2000514669A (en) |
CN (1) | CN1210456A (en) |
AU (1) | AU2150797A (en) |
BR (1) | BR9707322A (en) |
CA (1) | CA2244217A1 (en) |
DE (1) | DE19603410C2 (en) |
WO (1) | WO1997027812A1 (en) |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2781998B1 (en) * | 1998-08-07 | 2000-11-10 | Hassan Razian | PROSTHETIC ELEMENT, IMPLANTABLE INTO A BONE, WITH SEPARABLE HANDLING HEAD |
US7833250B2 (en) | 2004-11-10 | 2010-11-16 | Jackson Roger P | Polyaxial bone screw with helically wound capture connection |
US7862587B2 (en) | 2004-02-27 | 2011-01-04 | Jackson Roger P | Dynamic stabilization assemblies, tool set and method |
US8876868B2 (en) | 2002-09-06 | 2014-11-04 | Roger P. Jackson | Helical guide and advancement flange with radially loaded lip |
US7621918B2 (en) | 2004-11-23 | 2009-11-24 | Jackson Roger P | Spinal fixation tool set and method |
US7377923B2 (en) | 2003-05-22 | 2008-05-27 | Alphatec Spine, Inc. | Variable angle spinal screw assembly |
US8926670B2 (en) | 2003-06-18 | 2015-01-06 | Roger P. Jackson | Polyaxial bone screw assembly |
US7766915B2 (en) | 2004-02-27 | 2010-08-03 | Jackson Roger P | Dynamic fixation assemblies with inner core and outer coil-like member |
US7967850B2 (en) | 2003-06-18 | 2011-06-28 | Jackson Roger P | Polyaxial bone anchor with helical capture connection, insert and dual locking assembly |
US7776067B2 (en) | 2005-05-27 | 2010-08-17 | Jackson Roger P | Polyaxial bone screw with shank articulation pressure insert and method |
US8366753B2 (en) | 2003-06-18 | 2013-02-05 | Jackson Roger P | Polyaxial bone screw assembly with fixed retaining structure |
US7179261B2 (en) | 2003-12-16 | 2007-02-20 | Depuy Spine, Inc. | Percutaneous access devices and bone anchor assemblies |
US11419642B2 (en) | 2003-12-16 | 2022-08-23 | Medos International Sarl | Percutaneous access devices and bone anchor assemblies |
US7527638B2 (en) | 2003-12-16 | 2009-05-05 | Depuy Spine, Inc. | Methods and devices for minimally invasive spinal fixation element placement |
US11241261B2 (en) | 2005-09-30 | 2022-02-08 | Roger P Jackson | Apparatus and method for soft spinal stabilization using a tensionable cord and releasable end structure |
US7160300B2 (en) | 2004-02-27 | 2007-01-09 | Jackson Roger P | Orthopedic implant rod reduction tool set and method |
US8152810B2 (en) | 2004-11-23 | 2012-04-10 | Jackson Roger P | Spinal fixation tool set and method |
JP2007525274A (en) | 2004-02-27 | 2007-09-06 | ロジャー・ピー・ジャクソン | Orthopedic implant rod reduction instrument set and method |
US7651502B2 (en) | 2004-09-24 | 2010-01-26 | Jackson Roger P | Spinal fixation tool set and method for rod reduction and fastener insertion |
US8926672B2 (en) | 2004-11-10 | 2015-01-06 | Roger P. Jackson | Splay control closure for open bone anchor |
US9168069B2 (en) | 2009-06-15 | 2015-10-27 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer |
WO2006057837A1 (en) | 2004-11-23 | 2006-06-01 | Jackson Roger P | Spinal fixation tool attachment structure |
US8444681B2 (en) | 2009-06-15 | 2013-05-21 | Roger P. Jackson | Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert |
CN100391413C (en) * | 2005-03-19 | 2008-06-04 | 戴维享 | Location-guiding apparatus for arranging internal guide meedle in femur neck |
WO2008073323A2 (en) | 2006-12-08 | 2008-06-19 | Jackson Roger P | Tool system for dynamic spinal implants |
JP2012529969A (en) | 2008-08-01 | 2012-11-29 | ロジャー・ピー・ジャクソン | Longitudinal connecting member with tensioning cord with sleeve |
DE102010016812A1 (en) * | 2009-06-08 | 2011-03-17 | Z.-Medical Gmbh & Co. Kg | bone screw |
US8998959B2 (en) | 2009-06-15 | 2015-04-07 | Roger P Jackson | Polyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert |
EP2753252A1 (en) | 2009-06-15 | 2014-07-16 | Jackson, Roger P. | Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock |
CN103826560A (en) | 2009-06-15 | 2014-05-28 | 罗杰.P.杰克逊 | Polyaxial bone anchor with pop-on shank and winged insert with friction fit compressive collet |
US11229457B2 (en) | 2009-06-15 | 2022-01-25 | Roger P. Jackson | Pivotal bone anchor assembly with insert tool deployment |
CN101732086B (en) * | 2009-11-14 | 2011-06-15 | 常州鼎健医疗器械有限公司 | Pedicle nail with shape correcting function |
US8911479B2 (en) | 2012-01-10 | 2014-12-16 | Roger P. Jackson | Multi-start closures for open implants |
US8875368B2 (en) | 2012-08-03 | 2014-11-04 | Tyco Electronics Corporation | Controlled torque fasteners and methods for using same |
US8911478B2 (en) | 2012-11-21 | 2014-12-16 | Roger P. Jackson | Splay control closure for open bone anchor |
US10058354B2 (en) | 2013-01-28 | 2018-08-28 | Roger P. Jackson | Pivotal bone anchor assembly with frictional shank head seating surfaces |
US8852239B2 (en) | 2013-02-15 | 2014-10-07 | Roger P Jackson | Sagittal angle screw with integral shank and receiver |
US9566092B2 (en) | 2013-10-29 | 2017-02-14 | Roger P. Jackson | Cervical bone anchor with collet retainer and outer locking sleeve |
DE102013113135A1 (en) | 2013-11-27 | 2015-05-28 | Kreidler Medizintechnik Gmbh | Screw in particular bone screw and a tool for this |
DE202013105409U1 (en) | 2013-11-27 | 2013-12-04 | Kreidler Medizintechnik Gmbh | Screw in particular bone screw and a tool for this |
US9717533B2 (en) | 2013-12-12 | 2017-08-01 | Roger P. Jackson | Bone anchor closure pivot-splay control flange form guide and advancement structure |
US9451993B2 (en) | 2014-01-09 | 2016-09-27 | Roger P. Jackson | Bi-radial pop-on cervical bone anchor |
US10064658B2 (en) | 2014-06-04 | 2018-09-04 | Roger P. Jackson | Polyaxial bone anchor with insert guides |
US9597119B2 (en) | 2014-06-04 | 2017-03-21 | Roger P. Jackson | Polyaxial bone anchor with polymer sleeve |
DE202014006372U1 (en) * | 2014-08-05 | 2014-08-22 | Medartis Ag | Screw with insertion post |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR954633A (en) * | 1950-01-04 | |||
US4149434A (en) * | 1978-03-17 | 1979-04-17 | Leroy Wilson | Screw and screwdriver therefor |
DE3538593A1 (en) * | 1985-10-30 | 1987-05-07 | Thomas Dr Med Jungeblod | Device for the surgical treatment of bones, especially of fractured bones |
DE3630863A1 (en) * | 1986-09-08 | 1988-03-17 | Mecron Med Prod Gmbh | Bone screw |
DE3701765C1 (en) * | 1987-01-22 | 1988-06-09 | Ethicon Gmbh | Bone screw |
DE3804749A1 (en) * | 1987-08-31 | 1989-03-16 | Leibinger Oswald Gmbh | Screwdriver with screw holder, in particular for bone screws |
FR2625430A1 (en) * | 1987-12-30 | 1989-07-07 | Guinounet Alain | LOCKING SCREW OF OSTEOSYNTHESIS PLATE AND METHOD OF MANUFACTURING SAME |
DE4012506A1 (en) * | 1990-04-12 | 1991-10-17 | Mecron Med Prod Gmbh | BONE SCREW |
DE4131110A1 (en) * | 1991-09-12 | 1993-03-18 | Benno Heinzel | Short-threaded screw fastener for wood and composite material - has threaded lower end of shaft with double grip profile in head for securing tool |
FR2721819B1 (en) * | 1994-07-04 | 1996-10-04 | Amp Dev | SELF-DRILLING AND SELF-TAPPING ANKLE DEVICE WITH A SHRINKABLE END CAP, FOR LOCKING AN OSTEOSYNTHESIS PLATE OR COAPTING TWO BONE FRAGMENTS |
-
1996
- 1996-01-31 DE DE19603410A patent/DE19603410C2/en not_active Expired - Fee Related
-
1997
- 1997-01-28 JP JP09527246A patent/JP2000514669A/en active Pending
- 1997-01-28 WO PCT/DE1997/000195 patent/WO1997027812A1/en not_active Application Discontinuation
- 1997-01-28 BR BR9707322A patent/BR9707322A/en not_active Application Discontinuation
- 1997-01-28 CA CA002244217A patent/CA2244217A1/en not_active Abandoned
- 1997-01-28 EP EP97914109A patent/EP0959794A1/en not_active Withdrawn
- 1997-01-28 CN CN97192003A patent/CN1210456A/en active Pending
- 1997-01-28 AU AU21507/97A patent/AU2150797A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9727812A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2000514669A (en) | 2000-11-07 |
CA2244217A1 (en) | 1997-08-07 |
BR9707322A (en) | 1999-04-13 |
CN1210456A (en) | 1999-03-10 |
DE19603410C2 (en) | 1999-02-18 |
AU2150797A (en) | 1997-08-22 |
DE19603410A1 (en) | 1997-08-14 |
WO1997027812A1 (en) | 1997-08-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19980714 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE ES FR GB IT LI SE |
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17Q | First examination report despatched |
Effective date: 20011227 |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: F16B 31/02 20060101ALI20060612BHEP Ipc: F16B 23/00 20060101ALI20060612BHEP Ipc: A61B 17/86 20060101AFI20060612BHEP |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20061107 |