EP3484391A1 - Système d'ostéosynthèse polyaxial - Google Patents

Système d'ostéosynthèse polyaxial

Info

Publication number
EP3484391A1
EP3484391A1 EP16758085.1A EP16758085A EP3484391A1 EP 3484391 A1 EP3484391 A1 EP 3484391A1 EP 16758085 A EP16758085 A EP 16758085A EP 3484391 A1 EP3484391 A1 EP 3484391A1
Authority
EP
European Patent Office
Prior art keywords
hole
bone
bore
bone screw
polyaxial
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Withdrawn
Application number
EP16758085.1A
Other languages
German (de)
English (en)
Inventor
Emmanuel Anapliotis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aristotech Holding GmbH
Original Assignee
Aristotech Holding GmbH
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 Aristotech Holding GmbH filed Critical Aristotech Holding GmbH
Publication of EP3484391A1 publication Critical patent/EP3484391A1/fr
Withdrawn legal-status Critical Current

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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • 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
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A61B2017/00946—Material properties malleable

Definitions

  • the invention relates to a polyaxial screwed bone plate and a
  • Bone screw shaft and a bone plate having a top and a bottom includes, wherein in the bone plate at least one of the top to bottom passing through through hole for receiving the
  • Bone screw is set up and the bone screw with a selectable angle in the through hole can be introduced and fixed angularly stable in the through hole in the selected angle.
  • EP 1 935 359 B1 discloses a bone plate comprising at least two
  • the through holes are arranged offset from each other and intersect each other such that cut lines and / or
  • Through holes are conical or doppelkonisch formed.
  • Through hole is formed doppelkonisch and in the region of the smallest diameter a double conical thread or a double conical
  • the bone screw can be provided with a clamping sleeve with a spherical portion of an external thread, by means of which a polyaxial alignment of the bone screw in the region of the thread
  • EP 1 919 385 B1 describes a polyaxial bone fixation arrangement in which a plurality of protruding ribs are arranged in the throughbore of the bone plate, which are flexible and with which the thread of a bone screw cooperates.
  • the object of the invention is an improved polyaxial
  • a bone fixation system for a fixed-angle fixation of a bone plate with at least one bone screw, which is also easy to manufacture.
  • a polyaxial bone fixation system comprising a bone screw with a bone screw head with an external thread and a bone screw shaft and a bone plate is provided with an upper side and a lower side, wherein in the bone plate at least one of the top to bottom passing through through hole for receiving the bone screw set is, wherein the bone screw in a polyaxial angle in the through hole can be introduced and in the through hole in the selected angle fixed angle fixable or fixable.
  • each web has a projecting into the feedthrough bore and extending in the longitudinal direction of the feedthrough bore
  • each bridge is designed so that this at the Screwing the bone screw in a polyaxial angle with the through hole plastically deformed.
  • Deformability referred to a permanent deformation of the material.
  • Bone screw is prepared under polyaxial conditions, allowing the bone screw in one of the longitudinal axis of the through hole
  • Deviating angle stable in the through hole can be fixed.
  • the through hole may be cylindrical, conical or double conical in the longitudinal direction.
  • the angle describing the polyaxiality refers to that angle between the longitudinal axis of the through-hole and the longitudinal axis of the in the
  • Bone plate inserted bone screw when the bone screw is set obliquely to the longitudinal axis of the through hole in the through hole.
  • an area in the through hole is designated, in which the bone screw head is fixed in the through hole.
  • the through-bore-side wall of the web forms a partial surface of the
  • a through hole on at least one circumferential inner surface portion of the inner surface preferably on the entire circumferential inner surface, equipped with a continuous internal thread, with which the external thread on
  • Bone screw head of the bone screw cooperates.
  • the term “inner surface of the through hole” includes the in the
  • Material recess opening and through hole a web remains, the extends continuously from the top to the bottom of the bone plate and which delimits the through hole of the material recess opening.
  • the longitudinal axes of the Materialaussparungsö réelleen are aligned in a preferred embodiment parallel to the longitudinal axis of the through hole.
  • the cross-sectional shape of a Materialaussparungsö réelle is preferably circular or ellipsoidal, but may also have other cross-sectional shapes such as a rectangular or a polygonal cross-section.
  • the cross-sectional shape can vary over the length of a material recess.
  • the web is formed on the through hole side as a bulge projecting into the through hole, so that in the region of a bulge the radius or the edge distance to the center of the through hole is reduced or shortened.
  • Radius and edge distance are used synonymously in the broader context.
  • a Materialaussparungsötechnisch preferably has a circular
  • cross-section of the material recess may also have a polygonal geometry, as well as a triangular or rectangular cross-sectional shape.
  • the material opening can be ellipsoidal or even geometrically irregular
  • the cross-sectional shape and / or the outer dimensions of the material recess opening remain constant over the course thereof from the upper side to the lower side of the bone plate.
  • the material opening may be tapered or otherwise pyramidal (in the form of a truncated pyramid) tapered.
  • Cross-sectional width of a material recess opening is basically a
  • the shape of the fixation region can be formed on the bone screw required for screwing the bone plate in or on the bone angular position of the bone screw by a web or more webs by the force when screwing the bone screw into the through hole at least in one Part are pressed in the direction of the located behind a web Materialaussparungsö Maschinen Maschinen.
  • the bone screw can be fixed in the through hole at an angle 0 ° to 15 ° angle stable.
  • the degree of plastic deformability of a web is determined in particular by its local wall thickness and / or by the hardness of the web
  • Bone plate material In a particular embodiment, the wall thickness of a web over the length of the through hole to one side of the
  • the protruding into the through hole bulge may be formed by the web pointing in the radial direction to the longitudinal axis of the through hole and over the entire length of the
  • the bulge is formed by a pointing in the direction of the longitudinal axis of the through hole material thickening in the web.
  • the circle diameter between the innermost points of at least two webs is equal to the largest core diameter of the bone screw head. In a further embodiment, some are, advantageously all
  • Material recess openings which are arranged on a common circular path, are arranged evenly spaced apart in one embodiment.
  • a bone plate according to the invention of the invention is a bone plate according to the invention of the invention.
  • Bone fixation system is preferably manufactured by means of a manufacturing process comprising at least the following manufacturing steps:
  • thin-walled web is deformed such that its through-bore-side wall protrudes to form a bulge in the through hole.
  • the thread is after drilling or milling a through hole through the
  • FIG. 1 shows a two-dimensional representation of a bone plate section with a through-hole and four material recessed openings arranged around it
  • FIG. 2 shows a view of the bone plate section according to FIG. 1 in section A-A, FIG.
  • Fig. 3 View of the bone plate portion of FIG. 1 in section B-B and
  • FIG. 4 shows a three-dimensional representation of a bone plate section according to FIG. 1 with a through-hole and four material-saving openings arranged around it.
  • FIGS. 1 to 4 show a bone plate section of a bone plate 1 with a through-hole 4 extending from the upper side 2 to the lower side 3 and four arranged around the through-hole 4
  • Material recess opening 5.1, 5.2, 5.3 and 5.4 extends continuously from the top 2 to the bottom 3 of the bone plate 1 and is arranged close to the periphery of the through hole 4. It is essential that none of
  • Through hole 4 is a thin-walled web 6.1, 6.2, 6.3 and 6.4 respectively formed, which protrude into the through hole 4 and one each
  • Each inner wall 7.1, 7.2, 7.3 and 7.4 has a in the radial direction to the longitudinal axis of the through hole 4 facing and extending over the entire length of the through hole 4 extending convex curvature.
  • Bone plate section is aligned. In addition, there are two each
  • Center point also on a common circular path, the center lies in the longitudinal axis of the through hole set up.
  • Each Materialaussparungsö réelle 5.1, 5.2, 5.3 and 5.4 forms with their respective web 6.1, 6.2, 6.3 and 6.4, a deformation zone in the edge region of

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne un système d'ostéosynthèse polyaxial comprenant une vis à os munie d'une tête, d'un filetage mâle et d'une tige ainsi qu'une plaque d'ostéosynthèse (1) munie d'une face supérieure (2) et d'une face inférieure (3), au moins un trou débouchant (4) allant de la face supérieure à la face inférieure étant conçu dans la plaque d'ostéosynthèse afin de recevoir la vis à os et la vis à os pouvant être insérée selon un angle librement choisi dans le trou débouchant et fixée de manière stable dans le trou débouchant selon l'angle choisi. Autour du trou débouchant (4), plusieurs évidements dans le matériau (5), allant de la face supérieure à la face inférieure de la plaque d'ostéosynthèse, sont configurés de manière à ce que, entre le trou débouchant et chaque évidement dans le matériau, un élément de liaison (6) soit respectivement configuré pour s'étendre de la face supérieure à la face inférieure de la plaque d'ostéosynthèse, l'élément de liaison formant un bombement (9) empiétant dans le trou débouchant et s'étendant le long du trou débouchant et le rayon du trou débouchant étant réduit dans la zone du bombement empiétant dans le trou débouchant, l'élément de liaison pouvant être plastiquement déformable lors du vissage de la vis à os dans le trou débouchant.
EP16758085.1A 2016-07-18 2016-07-18 Système d'ostéosynthèse polyaxial Withdrawn EP3484391A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2016/000286 WO2018014888A1 (fr) 2016-07-18 2016-07-18 Système d'ostéosynthèse polyaxial

Publications (1)

Publication Number Publication Date
EP3484391A1 true EP3484391A1 (fr) 2019-05-22

Family

ID=56851318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16758085.1A Withdrawn EP3484391A1 (fr) 2016-07-18 2016-07-18 Système d'ostéosynthèse polyaxial

Country Status (4)

Country Link
US (1) US20190314069A1 (fr)
EP (1) EP3484391A1 (fr)
DE (1) DE112016007075A5 (fr)
WO (1) WO2018014888A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343117C2 (de) 1993-12-17 1999-11-04 Dietmar Wolter Fixationssystem für Knochen
US20050096657A1 (en) * 2002-02-26 2005-05-05 Alex Autericque Osteosynthesis or arthrodesis material comprising a bony plate
CN101272743B (zh) 2005-07-25 2011-01-26 史密夫和内修有限公司 使用多轴式板的系统
EP1948053A1 (fr) * 2005-11-16 2008-07-30 Synthes GmbH Trou debouchant pour dispositif de fixation osseuse
DE202006019220U1 (de) 2006-12-19 2007-05-24 Zrinski Ag Orthopädisches Schraubenverschlusssystem
US8834536B2 (en) * 2009-07-16 2014-09-16 Nexxt Spine, LLC Cervical plate fixation system
FR2963396B1 (fr) * 2010-07-29 2012-08-24 Spineway Dispositif de retention d'une tete de vis engagee dans une ouverture formee dans l'epaisseur d'une plaque
DE102010048052B4 (de) 2010-10-12 2015-06-25 Bernhard Clasbrummel Nagel-Schrauben-System für eine Osteosynthese
EP2686563B1 (fr) * 2011-03-14 2019-06-19 Amit Sinha Vis de verrouillage et plaquettes
WO2015095126A1 (fr) * 2013-12-20 2015-06-25 Hartdegen Vernon Trou de blocage polyaxial
AU2015287901A1 (en) * 2014-07-10 2017-02-23 Crossroads Extremity Systems, Llc Bone implant and means of insertion

Also Published As

Publication number Publication date
US20190314069A1 (en) 2019-10-17
DE112016007075A5 (de) 2019-04-25
WO2018014888A1 (fr) 2018-01-25

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