WO2005120403A2 - Dispositif de fixation externe de segments osseux utilise en chirurgie orthopedique - Google Patents

Dispositif de fixation externe de segments osseux utilise en chirurgie orthopedique Download PDF

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Publication number
WO2005120403A2
WO2005120403A2 PCT/IB2005/001673 IB2005001673W WO2005120403A2 WO 2005120403 A2 WO2005120403 A2 WO 2005120403A2 IB 2005001673 W IB2005001673 W IB 2005001673W WO 2005120403 A2 WO2005120403 A2 WO 2005120403A2
Authority
WO
WIPO (PCT)
Prior art keywords
foregoing
fixing means
pair
rod
bone
Prior art date
Application number
PCT/IB2005/001673
Other languages
English (en)
Other versions
WO2005120403A3 (fr
Inventor
Pietro Mussolin
Original Assignee
Mikai S.P.A.
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 Mikai S.P.A. filed Critical Mikai S.P.A.
Priority to EP05745384A priority Critical patent/EP1753351A2/fr
Publication of WO2005120403A2 publication Critical patent/WO2005120403A2/fr
Publication of WO2005120403A3 publication Critical patent/WO2005120403A3/fr

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
    • A61B17/60—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 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
    • A61B17/6475—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod the connecting rod being 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
    • A61B17/60—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 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

Definitions

  • This invention refers to an external fixing device of bone segments for surgical-orthopaedic use.
  • the external fixing devices currently used in the surgical-orthopaedic field are used in operations to lengthen bone segments (e.g. phalanges). Said devices are also used in operations for stabilising bone segments after a fracture.
  • the devices used at present comprise a pair of elongated clamps that slide lengthways. These clamps have bone screws at the end to be implanted in the cortex of the bone segments concerned by the operation of lengthening or stabilisation.
  • the device also comprises handling devices consisting of a threaded bar engaged into both clamps.
  • This bar allows the clamps to be moved closer or farther away according to the requirements coming out during the operation and in the following stage.
  • These devices are made in several sizes in order to allow the application of more than one device simultaneously in different anatomical regions.
  • the main drawback posed by these devices lies in the application difficulties found by orthopaedic surgeons. This drawback mainly derive from the fact that the bone screws protruding out of the clamp can only be positioned parallely. This limits the ways in which the device can be applied, especially in anatomical regions that have a particularly complex and/or reduced morphology such as the hand or foot. For instance, these devices establish a minimum implant distance existing between the bone screws.
  • This minimum distance prevents the application of these devices in very small anatomical regions where the screw holes in the stumps/bone fragments are bored at a distance shorter than the minimum distance required by the implant.
  • This drawback also derives from the fact that this type of devices is both large and heavy, thus preventing the simultaneous application of more than one device to the same anatomical region, especially in very small areas such as the space between fingers and toes.
  • the size and weight of these devices significantly worsen the patient's quality of life.
  • their application prevents patients from performing their habits involving the anatomical region to which one or more of said devices are applied. .
  • the aim of this invention is to provide an external fixing device of bone segments for surgical-orthopaedic use that solves the drawbacks posed by the currently used devices.
  • an object of the invention is to provide a device that could be applied to anatomical regions of considerable morphological complexity and/or very small areas. Another object of this invention is to provide a device that could allow patients to perform their usual activities involving the anatomical region to which the surgery is applied. Another aim of the present invention is to provide a device that may be manufactured at reasonable costs. This aim, these and other objects that will become better apparent hereinafter, are achieved by an external fixing device of bone segments for surgical-orthopaedic use as claimed in attached claim 1.
  • the fixing device as claimed in claim 1 comprises orienting means of the bone screws in order to orient separately these bone screws, as required by the implant requirements, so that to allow applying the device to anatomical regions of considerable morphological complexity and/or very small areas. Furthermore, the device, according to the other claims, has been made in an easy way and with a reduced number of components in order to limit both its weight and dimension and its manufacturing costs.
  • FIG. 1 shows a front perspective view of the device acccording to the invention
  • - figure 2 shows a first lateral view of the device shown in figure 1
  • - figure 3 shows a plan view from above of the device in figure 1
  • - figure 4 shows a second lateral view of the device in figure 1
  • - figure 5 shows a plan view of the device in figure 1 applied to a bone element schematically shown.
  • the external fixing device of bone segments for surgical-orthopaedic use mainly comprises supporting means 7, a pair of fixing means, designated by the reference numbers 8 a and 8 b respectively, which are supported by the supporting means 7 and a pair of bone screws 9 a and 9 b protruding out of the supporting means 8 a and 8 b which are to be inserted in suitable bore holes of the stumps 10 a and 10 b of a bone element generally designated by the reference number 11.
  • the device also comprises orienting means, generally designated by the reference numbers 12 a and 12 b, joined to the fixing means 8 a and 8 b and used for orienting each screw 9 a and 9 b in an independent way.
  • these supporting means 7 comprise a threaded rod that can be shortened if necessary and provided with a pair of opposite bevels extending lengthwise.
  • the fixing means 8 a and 8 b are arranged onto the rod as described below.
  • the fixing means 8 a is locked onto one end of the rod 7 while the fixing means 8 b can be moved lengthwise along the rod.
  • These locking/moving means consist of a simple pair of nuts 13 b arranged on both sides of the movable fixing means 8 b to be screwed onto/unscrewed from the rod according to the requirements.
  • the fixing means 8 a and 8 b comprise sleeve members 14 a and 14 b which hold the rod and U-shaped means 15 a and 15 b, which in turn hold the sleeve members 14 a and 14 b and are closed at the front by the orienting means 12 a and 12 b.
  • Sleeve members 14 a and 14 b are advantageously provided with a pair of internal bevels (not shown) complementing the pair of external bevels on the rod 7 so that the sleeve members 14 a and 14 b are prevented from rotating around the rod 7.
  • the curved portions of the U- shaped means 15 a and 15 b hold the sleeve members 14 a and 14 b and the wings of the U-shaped means are provided with coaxial holes bored close to the ends of the wings for inserting the orienting means 12 a and 12 b.
  • the latter consist of screws 16 a and 16 b inserted into these coaxial holes.
  • These screws 16 a and 16 b have crosswise holes bored through the shanks near the heads 17 a and 17 b.
  • the bone screws 9 a and 9 b are inserted in these cross holes.
  • Said screws 16 a and 16 b have tightening nuts 18 a and 18 b fitted in the end opposite the heads 17 a and 17 b.
  • the application of the device 6 onto a bone segment 11 is described below.
  • the device insertion holes are bored into the stumps 10 a and 10 b of the bone segment 11.
  • the device 6 is then prepared for the application which is carried out in approximately three steps described hereinafter.
  • the first step consists in adjusting the distance between the fixing means 8 a and 8 b to the distance existing between the insertion holes.
  • This step is carried out by acting with a handling tool on the locking/moving means in order to move the fixing means 8 b in relation to the fixing means 8 a until reaching the desired distance. This distance is then fixed by acting onto the locking/moving means.
  • the second step consists in adjusting the level of protrusion of the bone screws 9 a and 9 b in relation to fixing means 8 a and 8 b according to the surgical requirements. This step is carried out by pulling back or advancing the bone screws 9 a and 9 b in relation to the fixing means 8 a and 8 b until achieving the desired level of protrusion.
  • the third step consists in orienting the bone screws according to the direction of the insertion holes in stumps 10 a and 10 b.
  • This step is carried out by orienting the bone screws 9 a and 9 b separately as required until reaching the desired orientation.
  • the level of protrusion and orientation desired for bone screws 9 a and 9 b are fixed by acting onto the tightening nuts 18 a and 18 b with a handling tool while the locking heads 17 a and 17 b of the bone screws 16 a and 16 b are kept in an locking condition using another handling tool.
  • the bone screws 9 a and 9 b are inserted into the corresponding insertion holes in stumps 10 a and 10 b.
  • both nuts 13 b must be fastened onto rod 7 against the fixing means 8 b.
  • the device achieves the intended aim and objects, overcoming the drawbacks found in the state, of the art. In fact, the device allows applications also in anatomical regions of considerable morphological complexity and/or very small areas.
  • the device allows a patient to maintain nearly unchanged his own habits which are performed involving the anatomical region onto which the device has been implanted.
  • the device can be produced at reasonable costs.
  • the materials used, shapes, dimensions and the executions might be different, yet technically equivalent to the ones herein indicated, without departing from the scope of the present invention.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (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 dispositif de fixation externe de segments osseux utilisé en chirurgie orthopédique, comprenant un moyen de support, au moins une paire de moyens de fixation retenus par le moyen de support, et une pluralité de vis à os s'étendant à partir des moyens de fixation et destinées à être insérées dans des orifices de logement formés dans lesdits segments osseux. La particularité du dispositif consiste en ce qu'il comprend un moyen d'orientation relié aux moyens de fixation pour orienter chaque vis de la pluralité de vis à os de façon indépendante. Ledit dispositif permet de pallier les insuffisances de l'état de la technique et peut être utilisé, en particulier, dans des zones anatomiques d'une complexité morphologique considérable et/ou dans de très petites zones.
PCT/IB2005/001673 2004-06-09 2005-06-08 Dispositif de fixation externe de segments osseux utilise en chirurgie orthopedique WO2005120403A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05745384A EP1753351A2 (fr) 2004-06-09 2005-06-08 Dispositif de fixation externe de segments osseux utilise en chirurgie orthopedique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD2004U000051 2004-06-09
ITPD20040051 ITPD20040051U1 (it) 2004-06-09 2004-06-09 Dispositivo fissatore esterno di segmenti ossei ad uso chirurgico-ortopedico.

Publications (2)

Publication Number Publication Date
WO2005120403A2 true WO2005120403A2 (fr) 2005-12-22
WO2005120403A3 WO2005120403A3 (fr) 2006-03-16

Family

ID=35429128

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/001673 WO2005120403A2 (fr) 2004-06-09 2005-06-08 Dispositif de fixation externe de segments osseux utilise en chirurgie orthopedique

Country Status (3)

Country Link
EP (1) EP1753351A2 (fr)
IT (1) ITPD20040051U1 (fr)
WO (1) WO2005120403A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2484178A (en) * 2011-03-30 2012-04-04 Bath Med Eng Inst Dynamic finger fixator
CN112512446A (zh) * 2018-06-27 2021-03-16 德克萨斯苏格兰礼仪儿童医院 具有阴附件的外部固定连接杆
EP4061261A4 (fr) * 2020-02-18 2023-12-13 Wright Medical Technology, Inc. Dispositif de fixation d'os

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391693A (en) * 1943-12-09 1945-12-25 Zimmer Mfg Company Surgical splint
US5443464A (en) * 1993-02-16 1995-08-22 Memphis Orthopaedic Design, Inc. External fixator apparatus
EP0832613A1 (fr) * 1996-09-30 1998-04-01 European Community Extenseur mandibulaire multidirectionel
US5921985A (en) * 1998-02-10 1999-07-13 Texas Scottish Rite Hospital External fixation device and method
US5976133A (en) * 1997-04-23 1999-11-02 Trustees Of Tufts College External fixator clamp and system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59203551A (ja) * 1983-04-30 1984-11-17 京セラ株式会社 創外固定装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391693A (en) * 1943-12-09 1945-12-25 Zimmer Mfg Company Surgical splint
US5443464A (en) * 1993-02-16 1995-08-22 Memphis Orthopaedic Design, Inc. External fixator apparatus
EP0832613A1 (fr) * 1996-09-30 1998-04-01 European Community Extenseur mandibulaire multidirectionel
US5976133A (en) * 1997-04-23 1999-11-02 Trustees Of Tufts College External fixator clamp and system
US5921985A (en) * 1998-02-10 1999-07-13 Texas Scottish Rite Hospital External fixation device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2484178A (en) * 2011-03-30 2012-04-04 Bath Med Eng Inst Dynamic finger fixator
GB2484178B (en) * 2011-03-30 2012-10-10 Bath Med Eng Inst Dynamic finger fixator
CN112512446A (zh) * 2018-06-27 2021-03-16 德克萨斯苏格兰礼仪儿童医院 具有阴附件的外部固定连接杆
CN112512446B (zh) * 2018-06-27 2024-04-19 德克萨斯苏格兰礼仪儿童医院 具有阴附件的外部固定连接杆
EP4061261A4 (fr) * 2020-02-18 2023-12-13 Wright Medical Technology, Inc. Dispositif de fixation d'os

Also Published As

Publication number Publication date
EP1753351A2 (fr) 2007-02-21
WO2005120403A3 (fr) 2006-03-16
ITPD20040051U1 (it) 2004-09-09

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