WO2019134738A1 - Insertion apparatus for effecting fixation of spinal implants - Google Patents

Insertion apparatus for effecting fixation of spinal implants Download PDF

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Publication number
WO2019134738A1
WO2019134738A1 PCT/EP2018/050088 EP2018050088W WO2019134738A1 WO 2019134738 A1 WO2019134738 A1 WO 2019134738A1 EP 2018050088 W EP2018050088 W EP 2018050088W WO 2019134738 A1 WO2019134738 A1 WO 2019134738A1
Authority
WO
WIPO (PCT)
Prior art keywords
insertion apparatus
pincers
pedicle screw
outer rotary
shaft
Prior art date
Application number
PCT/EP2018/050088
Other languages
French (fr)
Inventor
Orkun KAYMAKCI
Celal Vatansever
Ersin Donmez
Original Assignee
Arcelik Anonim Sirketi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to PCT/EP2018/050088 priority Critical patent/WO2019134738A1/en
Priority to TR2018/20221A priority patent/TR201820221A2/en
Publication of WO2019134738A1 publication Critical patent/WO2019134738A1/en

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    • 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
    • A61B17/7082—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 for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws
    • 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

Definitions

  • the present invention relates to an insertion apparatus for fixation of spinal implants, such as pedicle screws.
  • a pedicle screw is defined to mean any fastener attached to a vertebra of the spine, and used as an anchor point for a rod, alignment structure or immobilization structure.
  • a pedicle screw has a shaft body with a helical thread attachable to a vertebra of a spine. The upper end of the shaft body incorporates a number of protrusions cooperating with apertures of a head portion of the pedicle screw. The head portion is supported on the upper end of the shaft body by the protrusions and configured for pivoting movement about an axis.
  • US8512344 discloses a medical instrument apparatus and method to insert and release medical implants, more specifically spinal implant insertion instruments for spinal fixation systems.
  • the insertion instrument may provide a positive locking and unlocking actuator, preferably in the form of a lever, which ensures that the pedicle screw and yoke assembly is either mechanically locked to the insertion instrument or unlocked to the insertion instrument.
  • US2017079702 discloses a pedicle screw.
  • the pedicle screw includes a threaded shaft portion and a head portion that is supported on the threaded shaft portion for pivoting movement relative to the threaded shaft portion.
  • a yoke portion is supported on the head portion for linear sliding movement relative to the head portion.
  • the insertion apparatus available in the state of the art comprise immovable gripping means which are not effective in gripping the movable yokes of pedicle screws and positioning of the pedicle screws.
  • the present invention addresses the situation where movable gripping means, such as movable pincers, are utilized in order to adjust and set the axis of the pedicle screw which facilitate fixation of the pedicle screw.
  • the present invention provides an insertion apparatus for fixation of spinal implants as provided by the characterizing features defined in Claim 1 and subsequent claims.
  • Primary object of the present invention is to provide an insertion apparatus for fixation of spinal implants, such as pedicle screws.
  • the present invention proposes an insertion apparatus for attaching any fastener and preferably a pedicle screw to a vertebra of the spine, said insertion apparatus comprising displaceable pincers effectuating a combined dual movement in response to movement of a fixing shaft and/or adjusting shaft relatively rotatable with respect to each other so as to adjust said pincers’ gripping aperture.
  • a pincer pin moves linearly back and forth in response to movement of the fixing shaft and/or adjusting shaft relatively rotatable with respect to each other and linear movement of an inner linearly movable member is transformed into rotary movement of an enclosing outer rotary member such that said pincers connected thereto are operated.
  • Fig. 1 demonstrates a side view of an insertion apparatus available in the state of the art.
  • Fig. 2 demonstrates a side view of an insertion apparatus according to the present invention and pedicle screw in disengaged position.
  • Fig. 3 demonstrates a side view of an insertion apparatus according to the present invention and pedicle screw in engaged position.
  • insertion apparatus available in the state of the art (Fig. 1) and the insertion apparatus (10) of the invention (Figs. 2-3) have similar ergonomic usage and have parts common to both structures. Like features are represented by like numbers.
  • Insertion apparatus (10) comprises a body (1), a fixing shaft (2), an adjusting shaft (3), pincers (4), a pincer pin (5) and a handle (9).
  • Pedicle screw (6) comprises a pedicle screw yoke (7) by which it is attachable to the insertion apparatus (10).
  • Fixing shaft (2) and adjusting shaft (3) on body (1) can be rotated in order to adjust the position of pincers (4) and grip pedicle screw (6).
  • Pincers (4) are attached to body (1) by a pincer pin (5).
  • Pedicle screws (6) can be fixed on insertion apparatus (10), facilitating their usage in orthopedic surgeries and eliminating complications.
  • the present invention proposes an insertion apparatus (10) for attaching any fastener and preferably a pedicle screw to a vertebra of the spine, and used as an anchor point for a rod, alignment structure or immobilization structure, said insertion apparatus (10) comprising a body (1), a fixing shaft (2), an adjusting shaft (3), pincers (4) and a handle (9).
  • said insertion apparatus (10) comprises movable pincers (8) operable by said fixing shaft (2) and/or adjusting shaft (3) that are relatively rotatable with respect to each other.
  • said pincers’ (4) gripping aperture is adjustable by relative rotation of said fixing shaft (2) or adjusting shaft (3) with respect to each other.
  • said pincers’ (4) gripping aperture is adjustable by back and forth linear movement of a pincer pin (5).
  • said pincer pin (5) comprises an inner linearly movable member (not shown) and an enclosing outer rotary member (not shown) such that linear movement of the inner linearly movable member is transformed into rotary movement of said enclosing outer rotary member.
  • said movable pincers (8) are connected with said enclosing outer rotary member such that back and forth linear movement of said inner linearly movable member of the pincer pin (5) provides adjustment of the gripping aperture of said pincers (4).
  • Pincers (4) move away from each other at one rotational direction and approach to each other for gripping the yoke of the pedicle screw at the opposite rotational direction.
  • Said inner linearly movable member and enclosing outer rotary member are inter-connected members such that inner linearly movable member is not rotatable but its displacement rotates its outer shell, i.e. said enclosing outer rotary member, which is in turn connected with said pincers (4) so as to effectuate their combined opening and closing movements.
  • said enclosing outer rotary member is made of a magnetized material.
  • the present invention addresses the situation where gripping means are not effective in gripping the movable yokes of pedicle screws and positioning of the pedicle screws.
  • An effectively movable and easy to position gripping means is configured in the form of movable pincers, utilized in order to adjust and set the axis of the pedicle screw which facilitate fixation of the pedicle screw.

Abstract

The present invention relates to an insertion apparatus for fixation of spinal implants, such as pedicle screws. The present invention more particularly relates to an insertion apparatus (10) for attaching any fastener and preferably a pedicle screw to a vertebra of the spine, and used as an anchor point for a rod, alignment structure or immobilization structure, said insertion apparatus (10) comprising a body (1), a fixing shaft (2), an adjusting shaft (3), pincers (4) and a handle (9).

Description

INSERTION APPARATUS FOR EFFECTING FIXATION OF SPINAL IMPLANTS
The present invention relates to an insertion apparatus for fixation of spinal implants, such as pedicle screws.
A pedicle screw is defined to mean any fastener attached to a vertebra of the spine, and used as an anchor point for a rod, alignment structure or immobilization structure. A pedicle screw has a shaft body with a helical thread attachable to a vertebra of a spine. The upper end of the shaft body incorporates a number of protrusions cooperating with apertures of a head portion of the pedicle screw. The head portion is supported on the upper end of the shaft body by the protrusions and configured for pivoting movement about an axis.
It is well-known that while currently available insertion apparatus for fixation of spinal implants have an ergonomic structure, there are still problems of proper positioning of spinal implants because the implants cannot be gripped in a steady manner. These problems cause complications during surgery and can lead to lost time.
Among others, a prior art publication in the technical field of the invention may be referred to as US8512344, which discloses a medical instrument apparatus and method to insert and release medical implants, more specifically spinal implant insertion instruments for spinal fixation systems. The insertion instrument may provide a positive locking and unlocking actuator, preferably in the form of a lever, which ensures that the pedicle screw and yoke assembly is either mechanically locked to the insertion instrument or unlocked to the insertion instrument.
Another prior art publication in the technical field of the invention may be referred to as US2017079702, which discloses a pedicle screw. The pedicle screw includes a threaded shaft portion and a head portion that is supported on the threaded shaft portion for pivoting movement relative to the threaded shaft portion. A yoke portion is supported on the head portion for linear sliding movement relative to the head portion.
The insertion apparatus available in the state of the art comprise immovable gripping means which are not effective in gripping the movable yokes of pedicle screws and positioning of the pedicle screws. The present invention, on the other hand, addresses the situation where movable gripping means, such as movable pincers, are utilized in order to adjust and set the axis of the pedicle screw which facilitate fixation of the pedicle screw.
The present invention provides an insertion apparatus for fixation of spinal implants as provided by the characterizing features defined in Claim 1 and subsequent claims.
Primary object of the present invention is to provide an insertion apparatus for fixation of spinal implants, such as pedicle screws.
The present invention proposes an insertion apparatus for attaching any fastener and preferably a pedicle screw to a vertebra of the spine, said insertion apparatus comprising displaceable pincers effectuating a combined dual movement in response to movement of a fixing shaft and/or adjusting shaft relatively rotatable with respect to each other so as to adjust said pincers’ gripping aperture.
A pincer pin moves linearly back and forth in response to movement of the fixing shaft and/or adjusting shaft relatively rotatable with respect to each other and linear movement of an inner linearly movable member is transformed into rotary movement of an enclosing outer rotary member such that said pincers connected thereto are operated.
Accompanying drawings are given solely for the purpose of exemplifying an insertion apparatus, whose advantages over prior art were outlined above and will be explained in brief hereinafter.
The drawings are not meant to delimit the scope of protection as identified in the Claims, nor should they be referred to alone in an effort to interpret the scope identified in said Claims without recourse to the technical disclosure in the description of the present invention.
The drawings are only exemplary in the sense that they do not necessarily reflect the actual dimensions and relative proportions of the respective components of the system.
Fig. 1 demonstrates a side view of an insertion apparatus available in the state of the art.
Fig. 2 demonstrates a side view of an insertion apparatus according to the present invention and pedicle screw in disengaged position.
Fig. 3 demonstrates a side view of an insertion apparatus according to the present invention and pedicle screw in engaged position.
The following numerals are assigned to different part number used in the detailed description:
1) Body
2) Fixing shaft
3) Adjusting shaft
4) Pincers
5) Pincer pin
6) Pedicle screw
7) Pedicle screw yoke
8) Immovable pincers
9) Handle
10) Insertion apparatus
The insertion apparatus available in the state of the art (Fig. 1) and the insertion apparatus (10) of the invention (Figs. 2-3) have similar ergonomic usage and have parts common to both structures. Like features are represented by like numbers.
Insertion apparatus (10) comprises a body (1), a fixing shaft (2), an adjusting shaft (3), pincers (4), a pincer pin (5) and a handle (9). Pedicle screw (6) comprises a pedicle screw yoke (7) by which it is attachable to the insertion apparatus (10). Fixing shaft (2) and adjusting shaft (3) on body (1) can be rotated in order to adjust the position of pincers (4) and grip pedicle screw (6). Pincers (4) are attached to body (1) by a pincer pin (5). Pedicle screws (6) can be fixed on insertion apparatus (10), facilitating their usage in orthopedic surgeries and eliminating complications.
Currently available insertion apparatus having immovable pincers (8) still possess these problems and cannot be attached to movable yokes of pedicle screws and are only suitable for use with pedicle screws having immovable yokes.
In a nutshell, the present invention proposes an insertion apparatus (10) for attaching any fastener and preferably a pedicle screw to a vertebra of the spine, and used as an anchor point for a rod, alignment structure or immobilization structure, said insertion apparatus (10) comprising a body (1), a fixing shaft (2), an adjusting shaft (3), pincers (4) and a handle (9).
In one aspect of the present invention, said insertion apparatus (10) comprises movable pincers (8) operable by said fixing shaft (2) and/or adjusting shaft (3) that are relatively rotatable with respect to each other.
In a further aspect of the present invention, said pincers’ (4) gripping aperture is adjustable by relative rotation of said fixing shaft (2) or adjusting shaft (3) with respect to each other.
In a further aspect of the present invention, said pincers’ (4) gripping aperture is adjustable by back and forth linear movement of a pincer pin (5).
In a further aspect of the present invention, said pincer pin (5) comprises an inner linearly movable member (not shown) and an enclosing outer rotary member (not shown) such that linear movement of the inner linearly movable member is transformed into rotary movement of said enclosing outer rotary member.
In a further aspect of the present invention, said movable pincers (8) are connected with said enclosing outer rotary member such that back and forth linear movement of said inner linearly movable member of the pincer pin (5) provides adjustment of the gripping aperture of said pincers (4).
Pincers (4) move away from each other at one rotational direction and approach to each other for gripping the yoke of the pedicle screw at the opposite rotational direction. Said inner linearly movable member and enclosing outer rotary member are inter-connected members such that inner linearly movable member is not rotatable but its displacement rotates its outer shell, i.e. said enclosing outer rotary member, which is in turn connected with said pincers (4) so as to effectuate their combined opening and closing movements.
In a further aspect of the present invention, said enclosing outer rotary member is made of a magnetized material. This provides the additional advantage that in case the yoke portion of the pedicle screw is a magnetically responsive material and additional magnetic retaining bond can be established.
Therefore, the present invention addresses the situation where gripping means are not effective in gripping the movable yokes of pedicle screws and positioning of the pedicle screws. An effectively movable and easy to position gripping means is configured in the form of movable pincers, utilized in order to adjust and set the axis of the pedicle screw which facilitate fixation of the pedicle screw.

Claims (7)

  1. An insertion apparatus (10) for attaching a fastener and preferably a pedicle screw to a vertebra of the spine, and functioning as an anchor point for a rod, alignment structure or immobilization structure, said insertion apparatus (10) comprising a body (1), a fixing shaft (2), an adjusting shaft (3) and pincers (4) characterized in that;
    said insertion apparatus (10) comprises movable pincers (8) operable by said fixing shaft (2) and/or adjusting shaft (3) that are relatively rotatable with respect to each other.
  2. An insertion apparatus (10) as in Claim 1, characterized in that said pincers’ (4) gripping aperture is adjustable by relative rotation of said fixing shaft (2) or adjusting shaft (3) with respect to each other.
  3. An insertion apparatus (10) as in Claim 1 or 2, characterized in that said pincers’ (4) gripping aperture is adjustable by back and forth linear movement of a pincer pin (5).
  4. An insertion apparatus (10) as in Claim 3, characterized in that said pincer pin (5) comprises an inner linearly movable member and an enclosing outer rotary member such that linear movement of the inner linearly movable member is transformed into rotary movement of said enclosing outer rotary member.
  5. An insertion apparatus (10) as in Claim 4, characterized in that said movable pincers (8) are connected with said enclosing outer rotary member such that back and forth linear movement of said inner linearly movable member of the pincer pin (5) provides adjustment of the gripping aperture of said pincers (4).
  6. An insertion apparatus (10) as in Claim 4, characterized in that said enclosing outer rotary member is made of a magnetized material.
  7. An insertion apparatus (10) as in any preceding Claim, characterized in that said insertion apparatus (10) comprises a handle (9).
PCT/EP2018/050088 2018-01-03 2018-01-03 Insertion apparatus for effecting fixation of spinal implants WO2019134738A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2018/050088 WO2019134738A1 (en) 2018-01-03 2018-01-03 Insertion apparatus for effecting fixation of spinal implants
TR2018/20221A TR201820221A2 (en) 2018-01-03 2018-12-24 PLACING APPARATUS FOR EFFECTIVE FIXING OF SPINAL IMPLANTS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/050088 WO2019134738A1 (en) 2018-01-03 2018-01-03 Insertion apparatus for effecting fixation of spinal implants

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WO2019134738A1 true WO2019134738A1 (en) 2019-07-11

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WO (1) WO2019134738A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220183725A1 (en) * 2020-12-11 2022-06-16 Warsaw Orthopedic, Inc. Head position and driver combination instrument

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5946988A (en) * 1992-02-27 1999-09-07 Howmedica Gmbh Tool for driving pedicle screws
US8512344B2 (en) 2006-08-16 2013-08-20 Pioneer Surgical Technology, Inc. Insertion instrument for a spinal fixation system
EP2918238A1 (en) * 2014-03-14 2015-09-16 Biedermann Technologies GmbH & Co. KG Instrument for holding and inserting a bone anchor
US20170079702A1 (en) 2015-09-23 2017-03-23 Vijay Goel Pedicle Screw

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5946988A (en) * 1992-02-27 1999-09-07 Howmedica Gmbh Tool for driving pedicle screws
US8512344B2 (en) 2006-08-16 2013-08-20 Pioneer Surgical Technology, Inc. Insertion instrument for a spinal fixation system
EP2918238A1 (en) * 2014-03-14 2015-09-16 Biedermann Technologies GmbH & Co. KG Instrument for holding and inserting a bone anchor
US20170079702A1 (en) 2015-09-23 2017-03-23 Vijay Goel Pedicle Screw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220183725A1 (en) * 2020-12-11 2022-06-16 Warsaw Orthopedic, Inc. Head position and driver combination instrument
US11627998B2 (en) * 2020-12-11 2023-04-18 Warsaw Orthopedic, Inc. Head position and driver combination instrument

Also Published As

Publication number Publication date
TR201820221A2 (en) 2019-07-22

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