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WO2002067794A1 - Clou centromedullaire pour l'osteosynthese de fractures trochanteriennes du femur - Google Patents

Clou centromedullaire pour l'osteosynthese de fractures trochanteriennes du femur Download PDF

Info

Publication number
WO2002067794A1
WO2002067794A1 PCT/IB2002/000491 IB0200491W WO02067794A1 WO 2002067794 A1 WO2002067794 A1 WO 2002067794A1 IB 0200491 W IB0200491 W IB 0200491W WO 02067794 A1 WO02067794 A1 WO 02067794A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubular element
intramedullary nail
wire rods
screw
femur
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/IB2002/000491
Other languages
English (en)
Inventor
Alessio Monfardini
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.)
TQO Srl
Original Assignee
TQO Srl
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 TQO Srl filed Critical TQO Srl
Priority to EP02712156A priority Critical patent/EP1365692A1/fr
Publication of WO2002067794A1 publication Critical patent/WO2002067794A1/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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
    • A61B17/744—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to an intramedullary nail
    • 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
    • A61B17/7233—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone
    • 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
    • A61B17/7233—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone
    • A61B17/725—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone with locking pins or screws of special form
    • 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
    • A61B17/7233—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone
    • A61B17/7258—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone
    • A61B17/7266—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone with fingers moving radially outwardly

Definitions

  • the present invention relates to an intramedullary (endomedullary) nail for the promotion of osteosynthesis of bone fractures, and in particular for the surgical treatment of femur's trochanteric fractures.
  • Femur's trochanteric fractures are usually treated with intramedullary nails provided with a tubular element that is longitudinally inserted in the bone marrow, a cephalic screw which is introduced into a corresponding seat obtained in the greater trochanter, in order to guide the osteosynthesis in correspondence of the fracture, and stabilizing screws positioned in the distal portion of the nail, i.e., that nail portion which, upon application of the device, is near to the knee, to allow the blocking of the nail on the femur bone.
  • An intramedullary nail of this type for the treatment of trochanter fractures has some drawbacks. It has been, in fact, found that with this type of device, the infection risks increase because of the additional incisions necessary for the positioning of the stabilizing screws in the nail distal portion.
  • these devices require a rather long recovery time for the patient.
  • the stabilizing screws are coupled in a stable manner, without any clearance, in special seats obtained on the nail, which is why during this first rehabilitation stage, it is not possible to load the leg and to stimulate the fracture rima.
  • the type of coupling of the stabilizing screws with the intramedullary nail change, passing from a stable distal blocking to a dynamic distal blocking, following a further operation, and the stimulation of the fracture rima becomes therefore possible.
  • Object of the present invention is to provide an intramedullary nail for the treatment of femur's trochanteric fractures, such as to allow to solve all the drawbacks of the known art.
  • an object of the present invention is to provide an intramedullary nail for femur's trochanteric fractures, such as to reduce the risk of infections.
  • Another object of the present invention is to provide an intramedullary nail such as to reduce the operation and biological recovery times.
  • Another object of the present invention is to provide an intramedullary nail whose application is easy and allows to reduce the exposure of patient and surgeon to x rays.
  • an intramedullary nail for the surgical treatment of femur's trochanteric fractures comprising a tubular element provided with a cephalic screw and at least a stabilizing element, characterized in that said stabilizing element comprises a couple of wire rods which are angled at one end and arranged longitudinally and internally relatively to the tubular element, to come out from two openings located in the distal portion of said tubular element.
  • An intr ⁇ medull ⁇ ry nail of this type needs no additional incisions to. block the stabilizing element to the femur, and reduces, therefore, infection risks.
  • the screw and/or the tubular element have grooves for housing wire rods.
  • the grooves extend longitudinally on at least a portion of the internal surface of the tubular element. According to another advantageous aspect of the present invention, the grooves extend on the external surface of the cephalic screw in parallel with its inclination axis.
  • the wire rods comprise a pointed and angled end, to block the nail to the femur bone, a central flat portion and at least a portion having a circular section.
  • a distal blocking of this type is stable and at the same time dynamically controlled, and the micro-movements realized by the wire rods allow an early load on the femur that promotes a rapid biological recovery.
  • the intramedullary nail comprises also a device for blocking in their position both the wire rods and the cephalic screw.
  • Figure 2 is a longitudinal section view of the intramedullary nail of Figure 1 ;
  • FIG. 3 is still another longitudinal section view of the proximal portion of the intramedullary nail according to the present invention.
  • FIG. 4 is a cross-section view of the intramedullary nail in correspondence of the cephalic screw according to the present invention.
  • Figure 1 shows a possible embodiment of an intramedullary nail
  • tubular element 2 for the surgical treatment of femur's trochanteric fractures, comprising a tubular element 2 provided with a cephalic screw inclined with respect to the axis of the tubular element 2, and at least a stabilizing element composed of at least a couple of wire rods 4, 5 that are angled at an end and positioned longitudinally and internally relatively to the tubular element 2, to come out from two openings 9, 10 obtained in the distal portion of said tubular element.
  • wire rods are in number of two and come out from two openings obtained in the distal portion of the tubular element 2.
  • distal portion of nail 1 or tubular element 2 there is intended to indicate that portion of nail 1 or tubular element 2 that, upon the application of device 1 on the femur lies near the knee. Consequently, in the present description by “proximal portion of nail 1 or tubular element 2” there is intended to indicate that portion of nail 1 or tubular element 2 that, upon the application of device 1 on the femur, lies near the acetabulum of the iliac bone.
  • the tubular element 2 is provided with special grooves.
  • the intramedullary nail is provided wit two grooves 6, 7 for housing the wire rods that extend longitudinally for a portion of the tubular element 2 and that are located in a diametrically opposite manner on the internal surface of such element.
  • cephalic screw 3 is provided with grooves 8 (Fig. 3), suitable to prevent the interference with wire rods 4,5, in correspondence of their intersection with the cephalic screw 3 and also to provide an engaging seat for the blocking device of said screw.
  • cephalic screw 3 is provided, as shown in Figures 2 and 3, with four screws 8 located in a diametrically opposite manner on the external surface thereof, which extend in parallel with its inclination axis (indicated by a broken line in Figures 1 and 2).
  • Wire rods 4,5 have a first end portion having a circular section that continues, going down towards the distal portion of nail 1 , and a second flat portion in correspondence of the cephalic screw 3, and a third portion, having also a circular section, pointed and angled, that allows an easy coming out from openings 9, 10, obtained in the distal portion of the nail.
  • openings 9, 10, obtained in the distal portion of nail 1 are inclined and show the same inclination of the pointed end of wire rods 4, 5.
  • wire rods 4,5 are blocked in their position by a blocking device located at the end of the proximal portion of the tubular element 2.
  • the blocking device has a threaded plug element 1 1 (Fig. 3) that blocks wire rods 4,5 against the internal surface of the tubular element 2.
  • the plug element 1 1 has on its internal surface, in correspondence of its proximal portion, a thread 12 complementary to the one realized on the plug element 1 1.
  • the plug element 1 1 has also, arranged along its symmetry axis, a threaded coupling seat 17 for a nut 13 and a counter-nut 14, suitable to block in its position, with respect to the rotation, the cephalic screw 3.
  • the cephalic screw 3 has a flaring head 15 or a step-like head, that prevents any translations of the cephalic screw 3 along its inclination axis, and in particular prevents the cephalic screw from further penetrating into the greater trochanter.
  • a thread 16 On the opposite end of the cephalic screw there is positioned in a known manner a thread 16 that realizes the engagement of the cephalic screw 3 and therefore of the whole nail 1 with the femur bone, and in particular, with the greater trochanter.
  • an inclined through-hole 20 is positioned that allows, during the application of the intramedullary nail 1 , thanks to a guide screw, not shown and removed afterwards, to fix nail 1 in its position before the insertion of the cephalic screw 3 into the greater trochanter.

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

Clou intramédullaire (1) conçu pour le traitement chirurgical de fractures trochanteriennes du fémur et consistant en un élément tubulaire (2) pourvu d'une vis céphalique (3) et en au moins un élément stabilisateur comportant au moins une paire de fils (4, 5) orientés angulairement à une extrémité et placés dans la longueur et à l'intérieur de l'élément tubulaire afin de sortir par des ouvertures (9, 10) pratiquées dans la partie distale dudit élément tubulaire.
PCT/IB2002/000491 2001-02-27 2002-02-19 Clou centromedullaire pour l'osteosynthese de fractures trochanteriennes du femur Ceased WO2002067794A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02712156A EP1365692A1 (fr) 2001-02-27 2002-02-19 Clou centromedullaire pour l'osteosynthese de fractures trochanteriennes du femur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20010100 ITMI20010100U1 (it) 2001-02-27 2001-02-27 Chiodo endomidollare per l'osteosintesi delle fratture troncanterichedel femore
ITMI2001U000100 2001-02-27

Publications (1)

Publication Number Publication Date
WO2002067794A1 true WO2002067794A1 (fr) 2002-09-06

Family

ID=11446542

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/000491 Ceased WO2002067794A1 (fr) 2001-02-27 2002-02-19 Clou centromedullaire pour l'osteosynthese de fractures trochanteriennes du femur

Country Status (4)

Country Link
EP (1) EP1365692A1 (fr)
IT (1) ITMI20010100U1 (fr)
RU (1) RU2289351C2 (fr)
WO (1) WO2002067794A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003032852A3 (fr) * 2001-10-17 2003-09-12 Dale G Bramlet Clou centromedullaire pour la hanche a verrou bifurque
WO2002085219A3 (fr) * 2001-04-24 2004-03-04 Bramlet Dale G Systeme d'enclouage intramedullaire du col femoral
FR2965471A1 (fr) * 2010-09-30 2012-04-06 Christian Cuny Ensemble de fixation intramedullaire
US9295504B2 (en) 2009-03-31 2016-03-29 Biomet C.V. Intramedullary nail with locking key
FR3096881A1 (fr) * 2019-06-05 2020-12-11 One Ortho Système de fixation distale d’une tige intramédullaire dans la diaphyse d’un os
US11857228B2 (en) 2020-03-06 2024-01-02 Stryker European Operations Limited Set screw for femoral nail
US12207849B2 (en) 2020-03-06 2025-01-28 Stryker European Operations Limited Set screw for femoral nail

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008001324A2 (fr) 2006-06-30 2008-01-03 O.S.P. Ortho Service Provider S.R.L. Dispositif de verrouillage pour clous intramédullaires et clou intramédullaire comprenant un tel dispositif
CA2765376C (fr) * 2009-06-30 2017-06-06 Smith & Nephew, Inc. Implant orthopedique et ensemble fixateur
HUE027609T2 (en) * 2011-01-21 2016-10-28 Synthes Gmbh Extensible femur bone segment
RU2582980C1 (ru) * 2015-03-11 2016-04-27 Федеральное государственное бюджетное учреждение науки Институт физики металлов имени М.Н. Михеева Уральского отделения Российской академии наук (ИФМ УрО РАН) Винтовой имплантат для остеосинтеза шейки бедренной кости

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5810820A (en) * 1994-05-20 1998-09-22 Santori; Francesco Saverio Endomedullar device for nailing long distance
EP0922437A1 (fr) * 1997-12-11 1999-06-16 ORTOMEDICAL S.p.A. Clou intramédullaire destiné à l'ostéosynthèse de fractures osseuses
US6077264A (en) * 1996-04-05 2000-06-20 Chemello; Antonio Intramedullary nail for the osteosynthesis of bone fractures

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1426569A1 (ru) * 1986-12-22 1988-09-30 Ю. М. Магомедов Фиксатор дл внутрикостного остеосинтеза
SU1584924A1 (ru) * 1987-06-19 1990-08-15 Московский медицинский стоматологический институт им.Н.А.Семашко Штифт дл остеосинтеза конструкции А.С.Имамалиева
RU2180813C2 (ru) * 1995-04-21 2002-03-27 Герд Вердинг Гвоздь для фиксации положения и формы сломанных длинных костей

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5810820A (en) * 1994-05-20 1998-09-22 Santori; Francesco Saverio Endomedullar device for nailing long distance
US6077264A (en) * 1996-04-05 2000-06-20 Chemello; Antonio Intramedullary nail for the osteosynthesis of bone fractures
EP0922437A1 (fr) * 1997-12-11 1999-06-16 ORTOMEDICAL S.p.A. Clou intramédullaire destiné à l'ostéosynthèse de fractures osseuses

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6648889B2 (en) 2001-04-24 2003-11-18 Dale G. Bramlet Intramedullary hip nail with bifurcated lock
WO2002085219A3 (fr) * 2001-04-24 2004-03-04 Bramlet Dale G Systeme d'enclouage intramedullaire du col femoral
WO2003032852A3 (fr) * 2001-10-17 2003-09-12 Dale G Bramlet Clou centromedullaire pour la hanche a verrou bifurque
US9295504B2 (en) 2009-03-31 2016-03-29 Biomet C.V. Intramedullary nail with locking key
FR2965471A1 (fr) * 2010-09-30 2012-04-06 Christian Cuny Ensemble de fixation intramedullaire
FR3096881A1 (fr) * 2019-06-05 2020-12-11 One Ortho Système de fixation distale d’une tige intramédullaire dans la diaphyse d’un os
US11857228B2 (en) 2020-03-06 2024-01-02 Stryker European Operations Limited Set screw for femoral nail
US12207849B2 (en) 2020-03-06 2025-01-28 Stryker European Operations Limited Set screw for femoral nail
US12349948B2 (en) 2020-03-06 2025-07-08 Stryker European Operations Limited Set screw for femoral nail

Also Published As

Publication number Publication date
ITMI20010100U1 (it) 2002-08-27
RU2289351C2 (ru) 2006-12-20
RU2003128957A (ru) 2005-03-27
EP1365692A1 (fr) 2003-12-03

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