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WO1997018770A1 - Implant scapulaire - Google Patents

Implant scapulaire Download PDF

Info

Publication number
WO1997018770A1
WO1997018770A1 PCT/NL1996/000448 NL9600448W WO9718770A1 WO 1997018770 A1 WO1997018770 A1 WO 1997018770A1 NL 9600448 W NL9600448 W NL 9600448W WO 9718770 A1 WO9718770 A1 WO 9718770A1
Authority
WO
WIPO (PCT)
Prior art keywords
bone plate
base plate
plate
base
acromion
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/NL1996/000448
Other languages
English (en)
Inventor
Petrus Maria Rozing
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP96937579A priority Critical patent/EP0871406A1/fr
Priority to AU75083/96A priority patent/AU708718B2/en
Publication of WO1997018770A1 publication Critical patent/WO1997018770A1/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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/809—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with bone-penetrating elements, e.g. blades or prongs

Definitions

  • the invention relates to an implant for fixing parts of a human shoulder blade.
  • the shoulder joint is a joint enabling a movement of the am relative to the body. More in particular, the shoulder joint is a ball joint, with the substantially spherical extremity of the humerus resting in a bowl-shaped space defined by the shoulder blade (scapula). That bowl-shaped space is, viewed relative to the body, substantially open outwards and downwards, and has on its inside a wall defined by the glenoid, while an upper wall is defined by the tip of the shoulder blade (acromion).
  • this bone piece is interrupted by an artificial sectioning of the bone, a so-called osteotomy, or by a fracture, the healing process is rendered more difficult in that it is not properly possible, if at all, to fix the broken parts relative to each other in a stable manner.
  • an implant according to the invention has the features as described in claim 1.
  • Fig. 1 is a schematic perspective view of a right shoulder of a human, in rear view;
  • Fig. 2 is a more schematic section of some parts of the shoulder joint;
  • Fig. 3 is a schematic top plan view of the right shoulder
  • Fig. 4A is a top plan view of an embodiment of an implant according to the invention.
  • Fig. 4B is a bottom view of this embodiment
  • Fig. 4C is a side elevation of this embodiment
  • Fig. 4D is a front view of this embodiment.
  • Fig. 5 is a section, comparable with Fig. 2, to illustrate the action of the implant according to the invention.
  • Fig. 1 schematically shows a right shoulder joint, generally designated by reference numeral 1, of a human, in rear view.
  • the shoulder joint 1 can be interpreted as a ball joint, with the substantially spherical extremity 2 of the humerus 3 resting in a bowl-shaped space 5 defined by the shoulder blade (scapula) 4.
  • the bony part of this bowl-shaped space 5 is on its inside defined by the glenoid 6 and at its upper side by the tip (acromion) 7 of the shoulder blade 4.
  • the acromion 7 can be considered a roof-shaped extremity of a bone ridge 8 which is an integral part of the shoulder
  • extremity 2 of the humerus 3 are sketched.
  • a fracture has occurred, as designated by reference
  • acromion body 11 is the portion of the acromion 7 which is still an integral part of the shoulder blade 4; the acromion fracture part 12 is the broken-off, extreme portion of the acromion 7.
  • Fig. 3 schematically shows the (broken) acromion 7 from the top.
  • Fig. 3 illustrates that the bone ridge a of the shoulder blade 4, viewed from the acromion 7, is directed obliquely backwards, and that the collarbone (clavicle) 9 is directed obliquely forwards but not connected, or at least not by bone, to the shoulder blade 4.
  • the deltoid (musculus deltoides) 20 attached to the collarbone 9 overlies the acromion fracture part 12. This deltoid 20 disturbs the position of the acromion fracture part 12
  • acromion fracture part 12 can move relative to the acromion body 11, but also because the acromion fracture part 12 assumes a wrong, downwardly hinged position relative to the acromion body 11.
  • Figs. 4A-D show an embodiment 40, promotes the healing
  • the implant 40 is manufactured from a material that is strong and biocompatible.
  • the material used can for instance be stainless steel, but preferably titanium is used, because in that case, it is still possible to produce an image, by means of X-radiation, of the set acromion 7, the glenoid and the humerus.
  • the implant 40 has a
  • substantially L-shaped cross section and comprises a bone plate 41 and a base plate 42 substantially perpendicular thereto.
  • the intersecting line between the plane defined by the bone plate 41 and the plane defined by the base plate 42 is designated by 43.
  • the thickness of the bone plate 41 and the base plate 42 is relatively small, and is preferably about 1 mm. in a simple form, the two plates 41 and 42 are
  • the two plates 41 and 42 are preferably manufactured from a solid block, by cutting away portions of the material, because in that case, the resulting implant 40 is stronger.
  • the implant 40 is intended to be fitted on the
  • the base plate 42 measured along the intersecting line 43, has a length L 42 based on the corresponding dimension of the acromion 7.
  • a suitable length L 42 is about 26 mm.
  • the width B 42 of the base plate 42, measured perpendicularly to the plane of the bone plate 41. is about 7-10 mm.
  • a suitable width is about 8.5 mm.
  • a central portion of the base plate 42 has been removed over a length of about 14 mm.
  • the base plate 42 comprises two base portions 44 and 45 substantially perpendicular to the bone plate 41, each having a length L 44 and L 45 respectively (measured in the direction of the above-mentioned intersecting line 43) of about 6 mm.
  • a hole 46, 47 for passing a screw 61 see Fig. 5 therethrough.
  • each base portion 44, 45 remote from the bone plate 41 Located at the end of each base portion 44, 45 remote from the bone plate 41 is a substantially triangular hook portion 48, 49, which is substantially perpendicular to the base plate 42 and hence directed substantially parallel to the bone plate 41.
  • a suitable width B 48 , B 49 for each triangular hook portion 48, 49, measured from the free end to the corresponding base portion 44, 45, i.e. perpendicular to the above-mentioned intersecting line 43, is about 7 mm.
  • the bone plate 41 comprises a bone plate base portion 51 and a bone plate fixation portion 52.
  • the bone plate base portion 51 adjoins the intersecting line 43, and has a length L51, measured along the intersecting line 43, which length corresponds to the length L 42 of the base place 42.
  • the bone plate base portion 51 can extend as an uninterrupted whole along the intersecting line 43 or, as shown in the top plan view of Fig. 4A, be provided with a central recess 53 having for instance a semicircular or semi-elliptic contour, which recess 53 is a continuation of the removed central portion of the base plate 42.
  • the bone plate fixation portion 52 has an elongated shape with a center line 54. This center line 54 intersects the intersecting line 43 at an intersection S about halfway the bone plate base portion 51.
  • Provided in the elongated bone plate fixation portion 52 is at least one hole 55 for passing a screw 62 (Fig. 5) therethrough. In the exemplary embodiment shown, three of such holes 55, 55', and 55" are present.
  • the center line 54 of the elongated bone plate fixation portion 52 makes an angle ⁇ with the intersecting line 43, which angle ⁇ is adapted to the
  • this angle ⁇ is in the range of 40°-80°.
  • a suitable value for this angle ⁇ is about 60°.
  • the bone plate 41 has a shape which, in top plan view (see Fig. 4A) substantially corresponds to the shape of a hockey stick or to the shape of the Greek letter ⁇ .
  • an implant for a left shoulder is of mirror-symmetrical design in respect of the implant shown for the right shoulder.
  • the fitting of the implant 40 is effected through surgery, as will be appreciated.
  • the implant 40 is slid over the acromion 7 from aside, with the hook portions 48, 49 being stuck under the extremity of the acromion fracture part 12, while the bone plate 41 comes to lie on the acromion body 11 and the bone ridge 8.
  • Horizontal screws 61 axe provided through the holes 46, 47 in the base portions 44, 45 of the base plate 42, which horizontal screws 61 preferably extend into the acromion body 11.
  • vertical screws 62 are provided through the holes 55, 55 P 55" in the bone plate fixation portion 52, which vertical screws 62 extend into the acromion body 11 and/or the bone ridge 8.
  • At least one of those holes (55") is slightly elongated (with the long axis of the ellipse being
  • the acromion fracture part 12 is at first positioned in the right place relative to the acromion body 11.
  • these screws 61 alone would not be able to withstand the above-mentioned force F1.
  • This force is taken up by the hook portions 48, 49, which form a support under the extremity of the acromion fracture part 12, and transmit that force to the acromion body 11 and/or the bone ridge 8 by means of the vertical screws 62. Because of the relatively great length of the bone plate fixation portion 52, those vertical screws 62 are loaded relatively slightly.
  • the deltoid muscle extends over the extremity of the acromion fracture part 12, and that deltoid muscle actually sits in the way during the fitting of the fixation means.
  • the implant according to the invention provides maximum stability while involving a minimum of fastening material and a minimum of "operation damage" (to the deltoid muscle).
  • portion 52 has a bent center line 54.
  • the implant is slightly bent so that its shape is more properly adapted to the shape of the bone parts of the patient in question. This adaptation can be performed by the surgeon himself directly before the fitting of the implant.
  • the number of base portions is larger than two, or that the number of screw holes (55) differs from three.

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)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

La présente invention concerne un implant en titane (40) destiné à fixer des fragments (11, 12) de l'acromion (7). L'implant (40) comprend une plaque vissée (41) et une plaque-base (42) sensiblement perpendiculaire à la plaque vissée, et elles se rencontrent sur une ligne d'intersection (43). La plaque vissée (41) comprend une partie de base (51) contiguë à la ligne d'intersection (43) et une partie allongée (52) de fixation de la plaque vissée, qui part de la partie de base (51). L'axe (54) de cette partie de fixation (52) de la plaque vissée forme, avec la ligne d'intersection (43), un angle α d'environ 60°. La partie fixation (52) de la plaque vissée présente des ouvertures (55, 55', 55'') destinées au passage d'une vis (62). La plaque-base (42) comprend deux parties (44, 45) présentant chacune une ouverture (46, 47) destinée au passage d'une vis (61) et, à l'extrémité, une partie triangulaire en crochet (48, 49) qui est perpendiculaire à la plaque-base (42).
PCT/NL1996/000448 1995-11-15 1996-11-14 Implant scapulaire Ceased WO1997018770A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP96937579A EP0871406A1 (fr) 1995-11-15 1996-11-14 Implant scapulaire
AU75083/96A AU708718B2 (en) 1995-11-15 1996-11-14 Shoulder implant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1001661A NL1001661C2 (nl) 1995-11-15 1995-11-15 Schouderimplantaat.
NL1001661 1995-11-15

Publications (1)

Publication Number Publication Date
WO1997018770A1 true WO1997018770A1 (fr) 1997-05-29

Family

ID=19761856

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1996/000448 Ceased WO1997018770A1 (fr) 1995-11-15 1996-11-14 Implant scapulaire

Country Status (5)

Country Link
EP (1) EP0871406A1 (fr)
AU (1) AU708718B2 (fr)
CA (1) CA2235730A1 (fr)
NL (1) NL1001661C2 (fr)
WO (1) WO1997018770A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2168956C1 (ru) * 1999-12-22 2001-06-20 Афанасьев Александр Спиридонович Устройство для лечения суставных переломов
RU2238691C2 (ru) * 2002-06-10 2004-10-27 Дальневосточный государственный медицинский университет Пластина для остеосинтеза эпифизеолизов и остеоэпифизеолизов лучевой кости у детей
EP1743586A1 (fr) * 2005-07-14 2007-01-17 Terray Corporation Plaque d'ostéosynthèse claviculaire
RU2343866C1 (ru) * 2007-04-25 2009-01-20 Федеральное государственное учреждение "Российский научно-исследовательский институт травматологии и ортопедии им. Р.Р. Вредена Федерального агентства по высокотехнологичной медицинской помощи" (ФГУ "РНИИТО им. Р.Р. Вредена Росмедтехнологий") Внутренний фиксатор для артродеза плечевого сустава
CN102283707A (zh) * 2011-08-19 2011-12-21 上海市奉贤区中心医院 一种肩锁钢板
KR101131253B1 (ko) * 2003-05-30 2012-03-30 신세스 게엠바하 뼈판
CN104306059A (zh) * 2014-11-21 2015-01-28 陆晓生 一种肩胛骨喙突区记忆合金解剖锁定内固定的器械
CN106667568A (zh) * 2016-12-31 2017-05-17 苏州市康力骨科器械有限公司 一种解剖型肩胛骨锁定钢板
CN110709022A (zh) * 2017-05-30 2020-01-17 德普伊新特斯产品公司 肩锁钩板
US11426220B2 (en) 2017-10-11 2022-08-30 Howmedica Osteonics Corp. Humeral fixation plate guides
EP4009887A4 (fr) * 2019-08-06 2023-08-30 Exactech, Inc. Système de réparation de fracture de l'acromion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982001645A1 (fr) * 1980-11-14 1982-05-27 Rahmanzadeh Rahim Dispositif pour maintenir les parties de l'articulation d'une epaule humaine
US5015248A (en) * 1990-06-11 1991-05-14 New York Society For The Relief Of The Ruptured & Crippled, Maintaining The Hospital For Special Surgery Bone fracture fixation device
DE9308944U1 (de) * 1993-06-16 1993-08-12 Eska Medical GmbH & Co, 23556 Lübeck Fixationshaken

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982001645A1 (fr) * 1980-11-14 1982-05-27 Rahmanzadeh Rahim Dispositif pour maintenir les parties de l'articulation d'une epaule humaine
US5015248A (en) * 1990-06-11 1991-05-14 New York Society For The Relief Of The Ruptured & Crippled, Maintaining The Hospital For Special Surgery Bone fracture fixation device
DE9308944U1 (de) * 1993-06-16 1993-08-12 Eska Medical GmbH & Co, 23556 Lübeck Fixationshaken

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2168956C1 (ru) * 1999-12-22 2001-06-20 Афанасьев Александр Спиридонович Устройство для лечения суставных переломов
RU2238691C2 (ru) * 2002-06-10 2004-10-27 Дальневосточный государственный медицинский университет Пластина для остеосинтеза эпифизеолизов и остеоэпифизеолизов лучевой кости у детей
US9931148B2 (en) 2003-05-30 2018-04-03 DePuy Synthes Products, Inc. Bone plate
KR101131253B1 (ko) * 2003-05-30 2012-03-30 신세스 게엠바하 뼈판
EP1743586A1 (fr) * 2005-07-14 2007-01-17 Terray Corporation Plaque d'ostéosynthèse claviculaire
RU2343866C1 (ru) * 2007-04-25 2009-01-20 Федеральное государственное учреждение "Российский научно-исследовательский институт травматологии и ортопедии им. Р.Р. Вредена Федерального агентства по высокотехнологичной медицинской помощи" (ФГУ "РНИИТО им. Р.Р. Вредена Росмедтехнологий") Внутренний фиксатор для артродеза плечевого сустава
CN102283707A (zh) * 2011-08-19 2011-12-21 上海市奉贤区中心医院 一种肩锁钢板
CN104306059A (zh) * 2014-11-21 2015-01-28 陆晓生 一种肩胛骨喙突区记忆合金解剖锁定内固定的器械
CN106667568A (zh) * 2016-12-31 2017-05-17 苏州市康力骨科器械有限公司 一种解剖型肩胛骨锁定钢板
CN110709022A (zh) * 2017-05-30 2020-01-17 德普伊新特斯产品公司 肩锁钩板
CN110709022B (zh) * 2017-05-30 2022-09-13 德普伊新特斯产品公司 肩锁钩板
US11583317B2 (en) 2017-05-30 2023-02-21 DePuy Synthes Products, Inc. Acromioclavicular hook plate
US11426220B2 (en) 2017-10-11 2022-08-30 Howmedica Osteonics Corp. Humeral fixation plate guides
US12137953B2 (en) 2017-10-11 2024-11-12 Howmedica Osteonics Corp. Humeral fixation plates
EP4009887A4 (fr) * 2019-08-06 2023-08-30 Exactech, Inc. Système de réparation de fracture de l'acromion
US12016601B2 (en) 2019-08-06 2024-06-25 Exactech, Inc. Acromion fracture repair system

Also Published As

Publication number Publication date
NL1001661C2 (nl) 1997-05-21
AU708718B2 (en) 1999-08-12
AU7508396A (en) 1997-06-11
CA2235730A1 (fr) 1997-05-29
EP0871406A1 (fr) 1998-10-21

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