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WO2006032362A9 - Produits d'osteosynthese partiellement resorbables - Google Patents

Produits d'osteosynthese partiellement resorbables

Info

Publication number
WO2006032362A9
WO2006032362A9 PCT/EP2005/009581 EP2005009581W WO2006032362A9 WO 2006032362 A9 WO2006032362 A9 WO 2006032362A9 EP 2005009581 W EP2005009581 W EP 2005009581W WO 2006032362 A9 WO2006032362 A9 WO 2006032362A9
Authority
WO
WIPO (PCT)
Prior art keywords
osteosynthesis
bone
screw
plate
osteosynthesis plate
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/EP2005/009581
Other languages
German (de)
English (en)
Other versions
WO2006032362A3 (fr
WO2006032362A2 (fr
Inventor
Michael Buhr
Werner Siekmann
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
Priority claimed from DE200420014575 external-priority patent/DE202004014575U1/de
Priority claimed from DE102005034068A external-priority patent/DE102005034068A1/de
Application filed by Individual filed Critical Individual
Publication of WO2006032362A2 publication Critical patent/WO2006032362A2/fr
Publication of WO2006032362A3 publication Critical patent/WO2006032362A3/fr
Publication of WO2006032362A9 publication Critical patent/WO2006032362A9/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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/866—Material or manufacture
    • 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
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/8635—Tips of screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B2017/00004—(bio)absorbable, (bio)resorbable or resorptive

Definitions

  • the invention relates to partially absorbable osteosyntheses.
  • the invention also relates to a device for osteosynthesis in which an osteosynthesis plate is connected to the bone on both sides of a fracture. Furthermore, the invention relates to a partially resorbable screw for osteosurgical purposes.
  • Osteosynthesemaschine be created from absorbable material.
  • the osteosynthesis plate consists of resorbable material and is reinforced by means of support or clamping elements.
  • a partially resorbable osteosynthesis plate according to the invention has been created, wherein mechanical stresses receiving elements are preferably housed inside the osteosynthesis plate.
  • reinforcement concrete is concrete by the inclusion of structural steel parts to the so-called.
  • Reinforced concrete The structural inlay is created on site according to a reinforcement plan to ensure that the reinforcement serves its purpose, not only after setting, but also after many years of service life of the building, the reinforcement must serve as a mechanical reinforcement element.
  • this system can be realized in different versions according to the invention, namely:
  • the purpose of the clamping elements in the matrix is to be able to absorb bending moments, splitting tensile stresses and / or bending tensile stresses.
  • the osteosynthesis plate is made of a polymerized lactide, wherein the degree of polymerization can be adjusted so that it corresponds to the degradation rate of the resorbable material.
  • the Osteosynthesis plate fulfill their function in a mechanical point of view. Depending on the application can then be ensured that the osteosynthesis plate according to the invention transfers its mechanical functions to the bone in the subsequent time, the same applies to the screw.
  • clamping elements are above all wires or bands in question, which have been introduced in an elongated form in the body of the osteosynthesis plate. But it can also be used as well a network of such wires and tapes to absorb corresponding stresses. It is also conceivable that the end parts of the wires are brought out of the actual wound area to the outside, so that after sufficient time after the first operation, the wires can be easily removed without a second operation is necessary.
  • the invention relates to a screw for osteosurgical purposes formed essentially of biodegradable material, having an elongate screw body extending in the direction of a longitudinal axis between a proximal and a distal end, wherein an outer surface of the screw body is provided with an external thread coaxial to the longitudinal axis. intended for guiding and holding the screw in the bone material of a patient and is defined for screwing in the screw body and advancing the distal end into the bone material.
  • Bioresorbable interference screws are known (EP 0 674 880 B1), which consist of bioresorbable material and are therefore completely degraded within 12 to 24 months and replaced by new bone material.
  • the interference screw can be used without prior tapping. At critical points, however, it can come to destruction, so that the The surgeon prefers to pre-cut the hole for the screw using a separate thread. However, this is an additional operation.
  • the present invention begins and essentially wants to retain the advantage of bioresorbability of the screw, but avoids the need for an additional cutting operation.
  • Figure 1 of the drawing shows a plan view of an osteosynthesis plate according to the invention.
  • Figures 2 and 3 show plan views of osteosynthesis plates of other embodiments of the invention.
  • Figure 4 shows a biodegradable screw according to the invention.
  • an osteosynthesis plate is denoted by 1, which is an oblong, plate-shaped element, and for this reason the osteosynthesis plate 1 is shown in two parts. Inside the osteosynthesis plate are three tension wires 2, which have been biased at both ends of the plate 1 via a respective washer 3 and a screw 5 in a suitable manner.
  • FIG. 1 it is a reinforcing plate 1, which consists of resorbable or biodegradable material, while the clamping elements 2 are metallic wires, which are put under tension at their ends by means of threaded screws.
  • Figures 2 and 3 each show a section of an osteosynthesis plate 20, which consists of conventional osteosynthesis material (non-degradable / resorbable).
  • An area 10 of resorbable / degradable / softening material directly in the area of a screw hole 11 or in its surroundings 200 over time leads to a mechanical decoupling between screws and osteosynthesis plate.
  • the advantage of this variant according to the invention is that the conventional proven osteosynthesis plates can be used, but these are supplemented by a small area containing degradable material.
  • the basic idea of the present invention namely to realize the mechanical decoupling of the plate from the bone by means of a partially resorbable osteosynthesis plate, also comprises the embodiments according to FIGS. 2 and 3.
  • the actual osteosynthesis plate is formed of metal, however the connecting regions are between the plate and the screws to be screwed into the bone, in that the head of the screw is not directly connected to the plate, but via an intermediate plate or an intermediate portion, the plate or the area being made of resorbable material.
  • the osteosynthesis plate so as to be composed of several parts, for example two metal parts connected by a common layer of resorbable material. This also makes it possible to obtain relatively little biodegradable material from the body, with the remaining metallic parts of the osteosynthesis plate being mechanically decoupled from the bone.
  • Figure 4 shows a screw 41 with a thread, wherein the screw body 42 is constructed concentrically to its longitudinal axis "L".
  • engaging parts are provided to allow the screw 41 to be rotated, while at the distal end 44, a titanium tip is formed.
  • the tip 44 and the remaining screw body part 42 are delimited from each other by an interface 46.
  • the tip 44 may be attached to the resorbable material of the screw body 42 in a variety of ways, including shrinking, screwing or gluing.
  • the relationships are shown only schematically, it is essential that the titanium tip 44 has only a small axial extent.
  • the Titanium tip 44 is best suited for screwing into the bone material so that the screw 41 can not break.
  • the titanium tip 41 may be provided with an internal inbus.
  • the shaft of biodegradable material would have to be hollow.
  • the cavity could be made so large that a suitable tool can be inserted there to reach the hex of the titanium tip 41. But it can also be a hexagonal interior provided in the shaft, so that by inserting the Allen wrench screwed both the titanium tip and the shaft can be rotated with.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention concerne un dispositif d'ostéosynthèse, une plaque d'ostéosynthèse étant connectée à un os sur les deux côtés d'une fracture. Ladite plaque d'ostéosynthèse est composée de matériau résorbable et est renforcée à l'aide d'éléments de renfort ou de serrage.
PCT/EP2005/009581 2004-09-17 2005-09-07 Produits d'osteosynthese partiellement resorbables Ceased WO2006032362A2 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE202004014575.8 2004-09-17
DE200420014575 DE202004014575U1 (de) 2004-09-17 2004-09-17 Schraube für osteochirurgische Zwecke
DE102005033297 2005-07-16
DE102005033297.8 2005-07-16
DE102005034068A DE102005034068A1 (de) 2005-07-16 2005-07-21 Partiell resorbierbare Osteosynthesen
DE102005034068.7 2005-07-21

Publications (3)

Publication Number Publication Date
WO2006032362A2 WO2006032362A2 (fr) 2006-03-30
WO2006032362A3 WO2006032362A3 (fr) 2006-06-01
WO2006032362A9 true WO2006032362A9 (fr) 2006-07-27

Family

ID=35448307

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/009581 Ceased WO2006032362A2 (fr) 2004-09-17 2005-09-07 Produits d'osteosynthese partiellement resorbables

Country Status (1)

Country Link
WO (1) WO2006032362A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338926A (en) * 1980-11-21 1982-07-13 Howmedica, Inc. Bone fracture prosthesis with controlled stiffness
DE3630862A1 (de) * 1986-09-08 1988-03-17 Mecron Med Prod Gmbh Osteosyntheseteil
FI83477C (fi) * 1987-07-10 1991-07-25 Biocon Oy Absorberande material foer fixering av vaevnader.
DE10137011C2 (de) * 2001-07-28 2003-12-04 Aesculap Ag & Co Kg Medizinisches Implantatsystem

Also Published As

Publication number Publication date
WO2006032362A3 (fr) 2006-06-01
WO2006032362A2 (fr) 2006-03-30

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