WO2010103494A2 - Plaque d'ostéosynthèse pour fractures du fémur - Google Patents

Plaque d'ostéosynthèse pour fractures du fémur Download PDF

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Publication number
WO2010103494A2
WO2010103494A2 PCT/IB2010/051079 IB2010051079W WO2010103494A2 WO 2010103494 A2 WO2010103494 A2 WO 2010103494A2 IB 2010051079 W IB2010051079 W IB 2010051079W WO 2010103494 A2 WO2010103494 A2 WO 2010103494A2
Authority
WO
WIPO (PCT)
Prior art keywords
plate
plane
angle
lies
femur
Prior art date
Application number
PCT/IB2010/051079
Other languages
English (en)
Other versions
WO2010103494A3 (fr
Inventor
Del Medico Nilli
Francesco Di Bartolo
Original Assignee
Intrauma S.R.L.
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
Priority claimed from IT000188A external-priority patent/ITTO20090188A1/it
Priority claimed from IT000551A external-priority patent/ITTO20090551A1/it
Application filed by Intrauma S.R.L. filed Critical Intrauma S.R.L.
Publication of WO2010103494A2 publication Critical patent/WO2010103494A2/fr
Publication of WO2010103494A3 publication Critical patent/WO2010103494A3/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
    • A61B17/68—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
    • A61B17/748—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 with means for adapting the angle between the longitudinal elements and the shaft axis of the femur
    • 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
    • A61B17/74—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
    • A61B17/746—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 a plate opposite the femoral head

Definitions

  • the present invention relates to an osteosynthesis plate for femur fractures.
  • the present invention relates to an osteosynthesis plate for fractures in the epiphysis or head of the femur.
  • Osteosynthesis plates for treating fractures in long bones, such as femur are known in the art.
  • Such plates generally have an elongated shape and they are available in several models, depending on the shape and size of the bone to which they have to be applied.
  • a plate for fixing fractures in the head of a bone comprises an elongated portion that can be fixed to the bone by means of a plurality of screws and an end portion that is provided with a barrel suitable for being inserted into the bone for housing a supporting means for the bone head, for instance a head screw or, alternatively, a head nail or similar device.
  • the axis of the barrel through which said screw or said nail passes is arranged on a plane that is perpendicular to the plane where the plate lies and it is inclined at a certain angle with respect to said plane where the plate lies, said angle depending on the shape and the size of the fractured bone.
  • said angle is usually comprised between 90° and 150°.
  • the plates according to prior art having this kind of structure do not take into account the femur antiversion angle.
  • the femur axis is not perfectly straight, but it is curved laterally and forwardly, so that the femur neck and head are in an advanced position with respect to the rest of the femur.
  • the femur antiversion angle can be defined as the angle formed by the femur neck and head with the frontal plane of the individual; in other words, once a femur is placed on an horizontal plane, the femur antiversion angle can be defined as the angle formed by the femur neck and head with said horizontal plane.
  • the femur antiversion angle can reach 30° - 35°, while in adult people, in the absence of specific pathologies, is usually comprised between 10° and 15°.
  • the main object of the present invention is to provide an osteosynthesis plate for femur fractures capable of overcoming the above drawbacks of prior art and of guaranteeing a correct insertion and a correct positioning of the bone head supporting means associated to the osteosynthesis plate inside the femur head, said bone head supporting means comprising in particular a bone head screw or a bone head nail.
  • the axis of the bone supporting means does not lie on the plane passing through the longitudinal axis of the body of the osteosynthesis plate and perpendicular to the plane where said body lies, but it is adequately inclined with respect to said plane, the femur antiversion angle is duly taken into account and the correct positioning of the bone head supporting means inside the femur head is guaranteed.
  • the axis of the bone head supporting means is inclined at an angle comprised between 1° and 30°, and preferably comprised between 1° and 15°, with respect to the plane passing through the longitudinal axis of the osteosynthesis plate.
  • the inclination of the bone head supporting means is obtained by making in the body plate through-holes that are inclined at an adequate angle with respect to the plane passing through the longitudinal axis of the body of the osteosynthesis plate and perpendicular to the plane where said body lies and by inserting into said through-holes barrels suitable for guiding the bone head supporting means into the femur head.
  • a distal portion and a proximal portion are identified in the plate body, said distal portion being intended to be placed along the diaphysis of the fractured femur and said proximal portion being intended to be placed at the head of said femur, and the plane where the proximal portion of the plate lies is rotated at an adequate angle around the longitudinal axis of the plate itself with respect to the plane where the distal portion of said plate lies.
  • the rotating angle between the plane where the proximal portion of the plate according to the invention lies and the plane where the distal portion of said plate lies is not fixed, but it can be adjusted, so that it can fit femurs with different antiversion angles.
  • FIG. 1 is a side view of an osteosynthesis plate according to a first preferred embodiment of the invention
  • FIG. 1 is a top view of the osteosynthesis plate of Figure 1 ;
  • FIG. 3 is a top view of an alternative version of the osteosynthesis plate of Figure 1;
  • - Figure 4 is a side view of an osteosynthesis plate according to a second preferred embodiment of the invention;
  • the osteosynthesis plate 1 for femur fractures comprises a body having a thin and elongated shape and suitable for being placed on the diaphysis of a fractured femur.
  • Said body comprises a plurality of through-holes 3 for the passage of screws (not shown) for blocking the body itself against the femur diaphysis.
  • the osteosynthesis plate 1 further comprises bone head supporting means provided at the end of the body of said plate that during use is closer to the femur head and suitable for penetrating into said head.
  • said supporting means comprises a bone head screw 9.
  • a barrel 7 is provided for guiding the bone head screw inside the femur head.
  • the barrel 7 is separated from the body 1 and it can be rigidly fastened thereto.
  • the body of the osteosynthesis plate 1 comprises an internally threaded through-hole 5 and, correspondingly, the barrel 7 comprises a threaded end portion 7a, suitable for engaging with the internal thread of said through- hole 5, so that the barrel 7 can be rigidly fastened to the body 1 simply by screwing.
  • the axis A of the bone head screw 9 - and therefore of the barrel 7 and of the through-hole 5 - forms an angle ⁇ with the plane P wherein the body of the osteosynthesis plate 1 lies, said angle ⁇ being comprised between 90° and 150° depending on the shape and size of the fractured bone (and being equal to about 120° in the example shown in Figure 1).
  • the axis A of the bone head screw 9 - and therefore of the barrel 7 and of the through-hole 5 - forms a non- null angle ⁇ with a plane P' passing through the longitudinal axis of the body of the osteosynthesis plate 1 and perpendicular to the plane P wherein said body lies.
  • said angle ⁇ is chosen each time so as to take into account the antiversion angle of the patient's femur, whereby it is guaranteed that the bone head screw 9 correctly penetrates into the head of the fractured femur.
  • Said angle ⁇ will be therefore preferably included in the range 1° - 30°, and more preferably included in the range 1° - 15°.
  • the osteosynthesis plate 1 further comprises an additional screw 15, having an anti-rotation function, preferably associated to a corresponding barrel 13 for being guided into the head of the fractured femur.
  • the barrel 13 of the additional screw 15 is also separated from the body 1 and it can be rigidly fastened thereto.
  • the body 1 comprises an internally threaded through-hole 11 and, correspondingly, the barrel 13 comprises a threaded end portion 13a, suitable for engaging the internal thread of said through-hole 11, so that the barrel 13 can be rigidly fastened to the body 1 simply by screwing.
  • the axis of the additional screw 15 - and therefore of the barrel 13 and of the through-hole 11 - is parallel to the axis A of the bone head screw 9 and therefore it forms the same non-null angle ⁇ with the plane P' passing through the longitudinal axis of the body 1 and perpendicular to the plane P wherein said body 1 lies.
  • FIG 3 an alternative version of the embodiment of the invention shown in Figure 1 and 2 is illustrated, said alternative version differing from what is described above for the kind of the bone head supporting means only.
  • said supporting means comprise a bone head nail 9'.
  • the bone head nail 9' can be coupled to the body of the osteosynthesis plate V by means of the provision of a sleeve or barrel 7', that is separated from the body of the osteosynthesis plate V and can be rigidly fastened thereto.
  • the axis A' of the bone head nail 9' forms an angle ⁇ ' with the plane P wherein the body of the osteosynthesis plate I' lies, said angle ⁇ ' being comprised between 90° and 150° depending on the shape and size of the fractured bone, and said axis A' forms a non- null angle ⁇ ' with the plane P' passing through the longitudinal axis of the body of the osteosynthesis plate 1' and perpendicular to said plane P wherein said body lies.
  • said angle ⁇ ' is chosen each time so as to take into account the antiversion angle of the patient's femur, whereby it is guaranteed that the bone head nail 9' correctly penetrates into the head of the fractured femur, and said angle ⁇ ' will be therefore preferably included in the range 1° - 30°, and more preferably included in the range 1° - 15°.
  • the osteosynthesis plate 101 comprises a body, having a thin and elongated shape and comprising a distal portion 101a, suitable to be placed on the diaphysis of a fractured femur and provided to this aim with a plurality of through-holes 103 for the passage of screws (not shown) for blocking the body of the osteosynthesis plate 101 against the femur diaphysis, and a proximal portion 101b, provided for being placed at the head of said femur and equipped to this aim with a barrel 107 provided with a longitudinal central channel 105 for guiding bone head supporting means into the femur head.
  • the barrel 107 is separated from the body of the osteosynthesis plate 101 and it can be rigidly fastened thereto.
  • the proximal portion 101b of the body of the osteosynthesis plate 101 comprises an internally threaded through-hole and, correspondingly, the barrel 107 comprises a threaded end portion, suitable for engaging the internal thread of said through-hole, so that the barrel 107 can be rigidly fastened to the body of the osteosynthesis plate 101 simply by screwing.
  • the distal portion 101a and the proximal portion 101b of the osteosynthesis plate 101 do not lie on the same plane.
  • the plane where the proximal portion 101b of the body of said plate 101 lies is rotated at a non-null angle ⁇ around the longitudinal axis L of said body with respect to the plane where the distal portion 101a of said body lies.
  • the longitudinal axis S of the channel 105 of the barrel 107 correspondingly forms a non-null angle ⁇ with the plane passing through the longitudinal axis L of the body of the osteosynthesis plate 101 and perpendicular to the plane where the distal portion 101a of said body lies.
  • said angle ⁇ is chosen so as to duly take into account the antiversion angle of the patient's femur, whereby it is guaranteed that the bone head supporting means inserted through the channel 105 of the barrel 107 correctly penetrate into the head of the fractured femur.
  • Said bone head supporting means can consist, for instance, in a bone head screw or in a bone head nail.
  • the angle ⁇ is preferably included in the range 1° - 30°, and more preferably included in the range 1° - 15°.
  • the body of the osteosynthesis plate 101 is made as a single piece and the angle ⁇ between the plane where the proximal portion 101b of said body lies and the plane of the distal portion 101a of said body lies is fixed.
  • the osteosynthesis plate according to the invention achieves the object set forth above, since it allows to guarantee a correct insertion of the bone head supporting means into the femur head, thanks to the fact that the antiversion angle of the patient's femur is duly taken into account. It is also evident that the preferred embodiments described in detail above are exclusively given by way of non limiting examples and that several modifications and variants are possible without departing from the scope of the invention as defined by the appended claims.

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  • 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

La présente invention porte sur une plaque d'ostéosynthèse (1 ; 1' ; 101) pour des fractures du fémur, plus particulièrement pour des fractures de l'épiphyse ou de la tête dudit fémur. La plaque d'ostéosynthèse selon l'invention permet de tenir compte de l'angle d'antéversion du fémur fracturé, de façon à garantir une introduction correcte et un positionnement correct du moyen de support de tête osseuse (9 ; 95) – comprenant par exemple une vis de tête osseuse ou un clou de tête osseuse – dans la tête du fémur. Selon l'invention, l'axe (A ; A') du moyen de support de tête osseuse (9 ; 9') ne se situe pas dans le plan passant par l'axe longitudinal du corps de la plaque d'ostéosynthèse (1 ; 1' ; 101) et perpendiculaire au plan (P) dans lequel se trouve ledit corps, mais est incliné de manière adéquate selon un angle par rapport audit plan, ledit angle (β ; β' ; γ) étant de préférence compris entre 1° et 30°, et de façon davantage préférée compris entre 1° et 15°.
PCT/IB2010/051079 2009-03-12 2010-03-12 Plaque d'ostéosynthèse pour fractures du fémur WO2010103494A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITTO2009A000188 2009-03-12
IT000188A ITTO20090188A1 (it) 2009-03-12 2009-03-12 Dispositivo di osteosintesi per fratture femorali.
ITTO2009A000551 2009-07-22
IT000551A ITTO20090551A1 (it) 2009-07-22 2009-07-22 Placca di osteosintesi per fratture femorali

Publications (2)

Publication Number Publication Date
WO2010103494A2 true WO2010103494A2 (fr) 2010-09-16
WO2010103494A3 WO2010103494A3 (fr) 2010-12-29

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Application Number Title Priority Date Filing Date
PCT/IB2010/051079 WO2010103494A2 (fr) 2009-03-12 2010-03-12 Plaque d'ostéosynthèse pour fractures du fémur

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WO (1) WO2010103494A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104688391A (zh) * 2015-03-17 2015-06-10 苏州瑞华医院有限公司 一种用于治疗股骨头坏死的网状支撑器
US9314283B2 (en) 2011-11-18 2016-04-19 DePuy Synthes Products, Inc. Femoral neck fracture implant
CN114848121A (zh) * 2022-05-12 2022-08-05 中国人民解放军总医院第四医学中心 一种可调节支撑结构的三角力学稳定形态的髋部骨折固定装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051847A (fr) * 1952-02-28 1954-01-19 Attelle réglable pour ostéosynthèse, permettant l'impaction des fragments
FR2501032A1 (fr) * 1981-03-03 1982-09-10 Letournel Emile Plaque pour l'osteosynthese de l'epiphyse superieure du femur et ensemble plaque-vis en faisant application
US5591168A (en) * 1993-10-25 1997-01-07 Tornier S.A. Device for stabilizing fractures of the upper end of the femur
US5658339A (en) * 1996-01-05 1997-08-19 Wright Medical Technology, Inc. Compression hip screw plate
WO2002043601A2 (fr) * 2000-11-22 2002-06-06 Milorad Mitkovic Element de fixation interne aux os
JP2003038508A (ja) * 2001-08-03 2003-02-12 Horikkusu:Kk 骨接合装置
WO2003022166A1 (fr) * 2001-09-07 2003-03-20 Vese, Silvana Dispositif d'osteosynthese pour fractures du femur
US20030083662A1 (en) * 2001-11-01 2003-05-01 Middleton Lance M. Orthopaedic implant fixation using an in-situ formed anchor
US20040092935A1 (en) * 1995-06-26 2004-05-13 Manderson Easton L. Rod implant for osteosynthesis of long bones
WO2004075766A1 (fr) * 2003-02-28 2004-09-10 Silvana Vese Plaque d'osteosynthese
WO2009013568A1 (fr) * 2007-07-20 2009-01-29 Nilli Del Medico Dispositif chirurgical pour la connexion d'os fracturés

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051847A (fr) * 1952-02-28 1954-01-19 Attelle réglable pour ostéosynthèse, permettant l'impaction des fragments
FR2501032A1 (fr) * 1981-03-03 1982-09-10 Letournel Emile Plaque pour l'osteosynthese de l'epiphyse superieure du femur et ensemble plaque-vis en faisant application
US5591168A (en) * 1993-10-25 1997-01-07 Tornier S.A. Device for stabilizing fractures of the upper end of the femur
US20040092935A1 (en) * 1995-06-26 2004-05-13 Manderson Easton L. Rod implant for osteosynthesis of long bones
US5658339A (en) * 1996-01-05 1997-08-19 Wright Medical Technology, Inc. Compression hip screw plate
WO2002043601A2 (fr) * 2000-11-22 2002-06-06 Milorad Mitkovic Element de fixation interne aux os
JP2003038508A (ja) * 2001-08-03 2003-02-12 Horikkusu:Kk 骨接合装置
WO2003022166A1 (fr) * 2001-09-07 2003-03-20 Vese, Silvana Dispositif d'osteosynthese pour fractures du femur
US20030083662A1 (en) * 2001-11-01 2003-05-01 Middleton Lance M. Orthopaedic implant fixation using an in-situ formed anchor
WO2004075766A1 (fr) * 2003-02-28 2004-09-10 Silvana Vese Plaque d'osteosynthese
WO2009013568A1 (fr) * 2007-07-20 2009-01-29 Nilli Del Medico Dispositif chirurgical pour la connexion d'os fracturés

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9314283B2 (en) 2011-11-18 2016-04-19 DePuy Synthes Products, Inc. Femoral neck fracture implant
US9662156B2 (en) 2011-11-18 2017-05-30 DePuy Synthes Products, Inc. Femoral neck fracture implant
US9999453B2 (en) 2011-11-18 2018-06-19 DePuy Synthes Products, Inc. Femoral neck fracture implant
US10507048B2 (en) 2011-11-18 2019-12-17 DePuy Synthes Products, Inc. Femoral neck fracture implant
CN104688391A (zh) * 2015-03-17 2015-06-10 苏州瑞华医院有限公司 一种用于治疗股骨头坏死的网状支撑器
CN114848121A (zh) * 2022-05-12 2022-08-05 中国人民解放军总医院第四医学中心 一种可调节支撑结构的三角力学稳定形态的髋部骨折固定装置

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