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EP1684651A1 - Plaque pour stabiliser des fractures distales de rayons - Google Patents

Plaque pour stabiliser des fractures distales de rayons

Info

Publication number
EP1684651A1
EP1684651A1 EP04797528A EP04797528A EP1684651A1 EP 1684651 A1 EP1684651 A1 EP 1684651A1 EP 04797528 A EP04797528 A EP 04797528A EP 04797528 A EP04797528 A EP 04797528A EP 1684651 A1 EP1684651 A1 EP 1684651A1
Authority
EP
European Patent Office
Prior art keywords
shaft
plate part
plate
distal
plate according
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.)
Withdrawn
Application number
EP04797528A
Other languages
German (de)
English (en)
Inventor
Olaf Meyer
Arnd Ehrhardt
Ulrich Dankwerth
Ulrich Finger
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.)
Koenigsee Implantate und Instrumente zur Osteosynthese GmbH
Original Assignee
Koenigsee Implantate und Instrumente zur Osteosynthese GmbH
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 DE10356904A external-priority patent/DE10356904B4/de
Application filed by Koenigsee Implantate und Instrumente zur Osteosynthese GmbH filed Critical Koenigsee Implantate und Instrumente zur Osteosynthese GmbH
Publication of EP1684651A1 publication Critical patent/EP1684651A1/fr
Withdrawn legal-status Critical Current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
    • A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
    • A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
    • 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

Definitions

  • the invention relates to a plate for stabilizing distal radius fractures, comprising an elongated shaft with a subsequent distal, anatomically pre-shaped plate part, the envelope of the plate part having an essentially triangular shape, and round holes arranged in the shaft and in the distal plate part, which are conical threaded holes can, with longitudinal axes of the threads which predominantly do not run parallel in the distal plate part, and wherein an offset is formed between the shaft and the plate part, according to the preamble of patent claim 1.
  • Distal radius fractures as fractures of the portion of the spoke near the wrist are the most common bony injuries in humans.
  • the spoke mostly breaks close to the wrist with or without involvement of the joint surface.
  • Serious injuries with fractures of the actual joint surface usually result from axially acting forces on the wrist, which in extreme cases split the spoke into several fragments.
  • Such fractures affect e.g. Patients who practice inline skating, motorcycling or snowboarding as a sport.
  • volar flexion or Smith fractures are always unstable and an indication for a volar support plate osteosynthesis. If there is a dorsal and / or radial debris zone, there is a risk that the fragments will tip over even after reduction. There is also an indication for surgery here.
  • volar angle-stable plates are also preferably used.
  • Such an angle-stable plate for the distal radius fracture with an anatomically pre-shaped distal plate part belongs to the prior art and goes back, for example, to Königsee implants and instruments from Osteosynthese GmbH. With the so-called plate after Dr. Petereit with volar application, the operative reduction result is permanently fixed by three angle-stable screws and no intra-operative corrections are necessary.
  • This known angle-stable plate for the distal radius fracture has an elongated shaft and a distal plate part, the shaft and plate part being connected via a crank.
  • the essentially triangular distal plate part receives the aforementioned angle-stable screws.
  • conical threaded holes are made in the plate part.
  • this known plate does not allow intraoperative post-modeling due to its very rigid embodiment.
  • the triangular shape of the plate part or the respective envelope of this plate part is unequal.
  • the envelope has a large number of conical threaded bores, the bore diameter of these threaded bores being selected to be substantially smaller than the diameter of the threaded bores in the shaft.
  • the longitudinal axes of the threads of the large number of bores in the distal plate part predominantly form different angles ⁇ to the shaft part, which differ from 90 °.
  • the side of the triangle facing away from the shaft has an interruption or a free area, the shaft and plate part forming a Y shape.
  • a transverse surface piece is provided on the respective sides of the plate part that forms the Y shape, each of which comprises at least two conical threaded bores.
  • the transverse surface pieces can have a different length and / or width and can be angled or cranked with respect to the shaft part.
  • the cross-sectional area of the shaft preferably has a curvature, so that irritations of the bone surface can be minimized.
  • the corner points of the triangular, distal plate part do not lie on a flat surface.
  • Such a plate structure is conceivable here, in which the corner points of the triangular plate part are located on a curved surface.
  • the threaded bores in the plate part are on the side of the triangle facing away from the shaft, in an arcuate arrangement.
  • the shaft of the radius plate can be fitted.
  • This waist is preferably located in the area between the above-mentioned elongated hole and the subsequent fastening hole of larger diameter.
  • the bore diameter of the threaded bores in the distal plate part is chosen to be approximately half smaller than the diameter of the screw holes in the shaft of the plate.
  • the Y-legs and / or the transverse surface pieces located at the ends of the legs can be easily remodeled.
  • the above-mentioned Y shape has the advantage in dorsal use compared to conventional plates that the tubercle listeri does not have to be removed, so that the surgical trauma can be reduced.
  • Any multi-fragment fractures that may be present can be fixed very well, in particular by the choice of angle-stable screws with a diameter of essentially 2 mm.
  • angle-stable screws with a diameter of essentially 2 mm.
  • four to eight, preferably five or six screws with a cortex thread in the screw shaft are used.
  • the plate itself is made from implant materials known per se, in particular implant steel or titanium or from titanium alloys.
  • Fig. 1 different views of a radius plate volar with closed leg area in the distal plate part
  • the distal radius plate each has an elongated shaft 1 which has an arrangement of screw holes with or without conical threaded bores 2 in combination with an elongated hole 3.
  • a symmetrical, waist-shaped recess 4 is present in the shaft.
  • crank 6 is provided in the transition area from the shaft 1 to the distal plate part 5, so that the desired basic structure corresponding to the anatomical conditions is obtained.
  • the cross section of the shaft 1 is provided with a curvature 7, which helps to avoid irritation of the periosteum.
  • Fig. 1 is based on an uneven triangular shape of the plate part 5.
  • the side of the triangle facing away from the shaft 1, i.e. the side 8 has a large number of conical threaded bores 9 of smaller diameter than that diameter of the screw holes 2 in the shaft 1.
  • the longitudinal axes of the threads of the plurality of bores in the plate part 5 are at different angles ⁇ towards the plate part, where ⁇ has an amount that deviates from 90 °.
  • the numbered 1 to 6 Bore designation has the angular dimensions given in the figure in the range from 60 ° to 89 °.
  • the end view of the plate according to Fig. 1 with a recognizable distal plate end makes it clear that the corner points of this approximately triangular plate part do not lie on a flat surface but on a curved surface that is adapted to the anatomical conditions.
  • the representation of the thread according to Fig. 1 relates to the large number of threaded holes in the distal plate part 5, the conical embodiment providing the necessary angular stability when a screw with a complementary thread is screwed into the screw head.
  • a shaft 1 with conical threaded bores 2 and elongated hole 3 and waist recess 4 is also provided.
  • the basic shape of the plate there corresponds to a Y.
  • a transverse surface piece 11 is provided on the respective sides of the plate shape 10 forming the Y shape, the transverse surface pieces 11, as can be seen in FIG. 2, have a different length or else width.
  • the longitudinal axes of the transverse surface pieces 11 run as shown in FIG. 2 at an angle to each other or correspond approximately to an arc according to FIG. 3.
  • the side view of the Y-plate part 10 according to FIG. 2 shows the anatomically adapted cranked shape of the two finger-like legs of the Y-plate part 10.
  • the longitudinal axes of the threaded bores predominantly have a non-parallel, ie angled, position to one another.
  • the shape of the Y-plate part 10 makes it possible, depending on the type of fracture or the fracture fragments present, to carry out a slight re-modeling.
  • the Y shape also has the advantage that the tuberculosis m listeri, which is a bone protrusion, does not have to be removed in dorsal application.
  • an angle-stable screw connection is provided both in the area of the shaft 1 and in the distal part 5 of the plate, i.e. near the joint gap possible. Multi-fragment fractures can be fixed very well, in particular by choosing angle-stable screws in the distal plate area with a diameter of essentially 2 mm.
  • the embodiment of the radius plate according to FIG. 2 is based on a non-symmetrical Y-plate part configuration, the shorter leg of the plate part 10 preferably being offset toward the shaft 1.
  • the thickness of the plate material is in the range of essentially 1 mm to 3 mm, implant steel, titanium or a titanium alloy being used as the material.

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

L'invention concerne une plaque pour stabiliser des fractures distales de rayons, cette plaque comprenant une tige (1) allongée se prolongeant par une partie plaque (5) distale de forme anatomique, dont l'extrémité de l'enveloppe a une forme sensiblement triangulaire. Dans la tige et dans la partie plaque distale sont disposés des orifices taraudés (2,9) de type coniques au moins à l'extrémité distale de la plaque, les axes longitudinaux du taraudage n'étant sensiblement pas parallèle dans la partie plaque distale et un coude (6) étant formé entre la tige et la partie plaque. L'invention est caractérisée en ce que la forme triangulaire de la partie plaque ou l'extrémité de l'enveloppe a des côtés inégaux, la face du triangle opposée à la tige comportant une pluralité d'orifices taraudés coniques, dont le diamètre est inférieur à celui des trous de vis de la tige, les axes longitudinaux du taraudage de la pluralité des orifices dans la partie plaque formant avec la surface de la tige un angle alpha différent de 90 DEG .
EP04797528A 2003-11-05 2004-11-02 Plaque pour stabiliser des fractures distales de rayons Withdrawn EP1684651A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10351501 2003-11-05
DE10356904A DE10356904B4 (de) 2003-11-05 2003-12-05 Platte zum Stabilisieren distaler Radiusfrakturen
PCT/EP2004/012385 WO2005044122A1 (fr) 2003-11-05 2004-11-02 Plaque pour stabiliser des fractures distales de rayons

Publications (1)

Publication Number Publication Date
EP1684651A1 true EP1684651A1 (fr) 2006-08-02

Family

ID=34575415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04797528A Withdrawn EP1684651A1 (fr) 2003-11-05 2004-11-02 Plaque pour stabiliser des fractures distales de rayons

Country Status (5)

Country Link
US (1) US7867260B2 (fr)
EP (1) EP1684651A1 (fr)
JP (1) JP2007509730A (fr)
CA (1) CA2544742A1 (fr)
WO (1) WO2005044122A1 (fr)

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Also Published As

Publication number Publication date
WO2005044122A1 (fr) 2005-05-19
US7867260B2 (en) 2011-01-11
JP2007509730A (ja) 2007-04-19
CA2544742A1 (fr) 2005-05-19
US20070123886A1 (en) 2007-05-31

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