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WO2020032891A2 - Dispositif de fixation externe ayant un dispositif d'alignement - Google Patents

Dispositif de fixation externe ayant un dispositif d'alignement Download PDF

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Publication number
WO2020032891A2
WO2020032891A2 PCT/TR2019/050530 TR2019050530W WO2020032891A2 WO 2020032891 A2 WO2020032891 A2 WO 2020032891A2 TR 2019050530 W TR2019050530 W TR 2019050530W WO 2020032891 A2 WO2020032891 A2 WO 2020032891A2
Authority
WO
WIPO (PCT)
Prior art keywords
bone
alignment device
external fixator
connection
alignment
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.)
Ceased
Application number
PCT/TR2019/050530
Other languages
English (en)
Other versions
WO2020032891A3 (fr
Inventor
Teyfik DEMIR
Fatih SOYLEMEZ
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.)
Tobb Ekonomi Ve Teknoloji Universitesi
Original Assignee
Tobb Ekonomi Ve Teknoloji Universitesi
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 Tobb Ekonomi Ve Teknoloji Universitesi filed Critical Tobb Ekonomi Ve Teknoloji Universitesi
Priority to EP19846126.1A priority Critical patent/EP3820389A4/fr
Publication of WO2020032891A2 publication Critical patent/WO2020032891A2/fr
Publication of WO2020032891A3 publication Critical patent/WO2020032891A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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 or setting implements
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6466—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod
    • A61B17/6483—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod the connecting rod having a non-circular section
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary devices, e.g. pins or nails

Definitions

  • the present invention relates to an external fixator having an alignment device which is used for therapeutic purposes in surgical operations of bone fractures and which enables to use external fixation and internal bone joining and alignment together during the treatment of the fractured bone.
  • Bones are rigid and firm structures that support body movements and allow the surrounding tissues to adhere.
  • the bones having a length greater than the thickness are classified as long bones.
  • the longest bone in the human skeletal structure is the femur (thigh) bone.
  • the state when the bone loses its original form and is fractured into a plurality of pieces due to any impact, pressure and trauma, and sometimes due to diseases such as bone resorption, bone tumors, and“osteogenesis imperfecta” is called a bone fracture.
  • one of the methods of closed reduction, plaster cast, external fixation, open reduction, fixation via plate-screw or intramedullary nailing is used to treat the fracture.
  • External fixators provide ease in wound care in case of open fractures; however pin site (nail site) infection and limitation of movement in the knee joint are among the major disadvantages of the external fixator.
  • External fixation is a method of fixing the bones from outside of the body.
  • the fixator is attached to the bone from outside of the body by nails or wires. These nails pass through the skin and sometimes through the muscles to connect the external fixator to the bone. Two or more nails are placed in order to hold the fractured bone in place and connect it to the fixator.
  • External fixation treatment method is also used for treatment of bone infections, bone nonunion and malunion, and for bone lengthening.
  • the biggest problem encountered in the external fixation method is the difficulty of locating the bone and the hole on the bone from outside of the body during fixation of the fractured bone. For this reason, bone and hole detection are carried out by using methods like laser, navigation system and ultrasound. In this case, the operation time is prolonged and complications may occur during the operation with the said methods.
  • the intramedullary nailing method which is used in long bone fractures, is based on the principle of placing the cylindrical intramedullary nail into the medullary canal in the bones and fixing it with screws in complete bone fractures.
  • intramedullary nailing method There are types of intramedullary nailing method, namely locked and unlocked. Locked intramedullary nailing method is suitable for anatomical and biomechanical structure of femur bone and it is a treatment method applied with high rates of union and low rates of complications.
  • the intramedullary nailing method the medullary canal (bone marrow) on the fractured bone is discharged and the intramedullary nail is placed along the canal so as to hold the bone in a linear position.
  • Intramedullary nails are mainly designed to enable load bearing and to minimize the movement in the fracture site. Standard intramedullary nails cannot contact the cortex sufficiently and therefore cannot provide the desired stability. The intramedullary nailing method prevents the rotational movement of the bone and ensures that it remains in a linear position.
  • the reduction process (the process of overlapping the axes of the medullary canal of the fractured bone fragments) cannot be carried out under suitable conditions since it is performed in a closed manner without seeing.
  • the nail changes shape according to the angle of the canal.
  • Different apparatuses are used to locate the distal lock screw.
  • the insertion of the screw to ensure locking without seeing takes a long time.
  • the rotation of the bone is prevented but it is not possible to align it linearly or bone union occurs in different directions.
  • surface friction problems are encountered when inserting an intramedullary nail in bone fractures.
  • a bone alignment device is inserted into the medullary canal within the fractured bone to render the fractured fragments concentric.
  • external fixation of the bone is ensured by means of the external fixator.
  • the alignment device inserted into the bone is connected at one end to the external fixator and the other end is exposed to prevent surface friction. In this case, malunion is prevented during bone healing.
  • United States patent document no. US20120209266A1 an application in the state of the art, with a priority date of 11.02.2011, discloses an external fixation system.
  • the lower part is angularly aligned to enable the screw connection for the elbow in the said document.
  • Three screws are used for the upper connection and the height and tension adjustment is provided by the moveable system.
  • the invention of the said document provides an external fixation system for fixing the deformed bone externally.
  • a bone alignment device is inserted into the medullary canal within the fractured bone to render the fractured fragments concentric.
  • external fixation of the bone is ensured by means of the external fixator.
  • the alignment device inserted into the bone is connected at one end to the external fixator and the other end is exposed to prevent surface friction. In this case, malunion is prevented during bone healing.
  • the external fixator having an alignment device disclosed in the present invention enables the deformed bone to be internally aligned and externally fixed.
  • the alignment device in the external fixator having an alignment device enables the fractured bone fragments to be aligned concentrically while at the same time fixing the bone from outside of the bone.
  • the alignment device inserted into the bone is connected at one end to the external fixator and the other end is exposed to prevent surface friction. In this case, malunion is prevented during bone healing.
  • the object of the present invention is to provide an external fixator having an alignment device which enables to align the fractured bone fragments concentrically by means of the alignment device passed through the medullary canal within the fractured bone.
  • a further object of the present invention is to provide an external fixator having an alignment device which prevents surface friction during internal alignment of the fractured bone fragments.
  • a further object of the present invention is to provide an external fixator having an alignment device which, when concentrically aligning the bone from the inside, prevents rotation of the fractured bone fragments by locking from one end of the alignment device.
  • Another object of the present invention is to provide an external fixator having an alignment device which, in addition to the internal alignment and the external fixation of the bone, prevents bone malunion.
  • the schanz screws which are passed through the connection regions, are inserted from one end of the external fixator into the connection hole in the connection end of the alignment device.
  • the schanz screws which are passed through the connection holes of the alignment device, are fitted into the alignment hole in the bone.
  • the alignment device connected to the bone and the external fixator at the connection end thereof enables the bone to be aligned concentrically and allows to adjust the length of the bone by being connected to the external fixator.
  • the alignment device is inserted into the medullary canal from one end thereof together with the external fixator and fixed to the bone, thereby preventing the bone from rotating and getting deformed (crooked) during the alignment thereof.
  • Figure 7 is an enlarged view of one end of the external fixator having an alignment device when placed on the bone from another angle.
  • At least one external fixator (2) which comprises at least one connection region (2.2) and at least one schanz screw (2.3), is mounted to the bone (A) through a plurality of connection regions (2.2) by means of schanz screws (2.3), and which enables the fractured bone (A) fragments, to which it is mounted, to be moved close to each other when the connection regions (2.2) are moved close to each other and the fractured bone fragments (A) to be moved away from each other when the connection regions (2.2) are moved away each other, at least one alignment device (3), which comprises at least one free end (3.2) and at least one connection end (3.3), and which
  • the alignment device (3) is placed in the medullary canal (B) within the bone (A) depending on the position and geometry of the bone (A).
  • the alignment device (3) is arranged in the medullary canal (B) such that the center axes of the alignment holes (C) coincide with the connection holes (3.3.1).
  • the alignment device (3) is inserted into the medullary canal (B) and aligns the bone (A) or the bone (A) fragments concentrically.
  • the schanz screws (2.3) are inserted into the connection regions (2.2) in the external fixator (2).
  • the alignment device (3) After the alignment device (3) is inserted into the medullary canal (B), the schanz screws (2.3), which are passed through the connection regions (2.2), are inserted from one end of the external fixator (2) into the connection hole (3.3.1) at the connection end (3.3) of the alignment device (3).
  • the schanz screws (2.3), which are passed through the connection holes (3.3.1) of the alignment device (3), are fitted into the alignment hole (C) in the bone (A).
  • the alignment device (3) connected to the bone (A) and the external fixator (2) at the connection end (3.3) thereof enables the bone (A) to be aligned concentrically and allows to adjust the length of the bone (A) by being connected to the external fixator (2).
  • the alignment device (3) is inserted into the medullary canal (B) from one end thereof together with the external fixator (2) and fixed to the bone (A), thereby preventing the bone (A) from rotating and getting deformed (crooked) during the alignment thereof.

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)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Neurology (AREA)
  • Surgical Instruments (AREA)

Abstract

La présente invention concerne un dispositif de fixation externe ayant un dispositif d'alignement (1) qui est utilisé à des fins thérapeutiques lors d'opérations chirurgicales de fractures osseuses (A) et qui permet d'utiliser la jonction et l'alignement de la fixation externe et de l'os interne (A) pendant le traitement de l'os fracturé (A).
PCT/TR2019/050530 2018-07-09 2019-07-05 Dispositif de fixation externe ayant un dispositif d'alignement Ceased WO2020032891A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19846126.1A EP3820389A4 (fr) 2018-07-09 2019-07-05 Dispositif de fixation externe ayant un dispositif d'alignement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2018/09776 2018-07-09
TR2018/09776A TR201809776A2 (tr) 2018-07-09 2018-07-09 Hi̇zalama aparatina sahi̇p bi̇r eksternal fi̇ksatör

Publications (2)

Publication Number Publication Date
WO2020032891A2 true WO2020032891A2 (fr) 2020-02-13
WO2020032891A3 WO2020032891A3 (fr) 2020-07-02

Family

ID=64558903

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2019/050530 Ceased WO2020032891A2 (fr) 2018-07-09 2019-07-05 Dispositif de fixation externe ayant un dispositif d'alignement

Country Status (3)

Country Link
EP (1) EP3820389A4 (fr)
TR (1) TR201809776A2 (fr)
WO (1) WO2020032891A2 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH668692A5 (en) * 1984-11-30 1989-01-31 Synthes Ag Bone pin alignment instrument - has lockable head pivoting in all directions
DE4328015A1 (de) * 1993-08-20 1995-02-23 Alumedica Aluminium Bearbeit Vorrichtung zum Behandeln von Knochen
AU1871997A (en) * 1995-10-21 1997-05-15 Dietmar Pennig Intramedullary cavity nail for femur elongation
US6706046B2 (en) * 2000-02-01 2004-03-16 Hand Innovations, Inc. Intramedullary fixation device for metaphyseal long bone fractures and methods of using the same
SI24067A (sl) * 2012-05-23 2013-11-29 dr. Vane Antolič Izboljšava modularne stranske naprave z intramedularnim žebljem za vodenje kosti pri postopku njenega podaljševanja
CN106859757B (zh) * 2015-12-14 2018-07-06 重庆医科大学附属永川医院 一种用于胫骨大段骨缺损的骨搬运装置

Also Published As

Publication number Publication date
EP3820389A4 (fr) 2022-03-23
TR201809776A2 (tr) 2018-08-27
EP3820389A2 (fr) 2021-05-19
WO2020032891A3 (fr) 2020-07-02

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