FR2642958A1 - System for implementing surgical interventions, such as the treatment of fractures of the vertebral column or of degenerative or tumoral lesions - Google Patents

System for implementing surgical interventions, such as the treatment of fractures of the vertebral column or of degenerative or tumoral lesions Download PDF

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Publication number
FR2642958A1
FR2642958A1 FR8902053A FR8902053A FR2642958A1 FR 2642958 A1 FR2642958 A1 FR 2642958A1 FR 8902053 A FR8902053 A FR 8902053A FR 8902053 A FR8902053 A FR 8902053A FR 2642958 A1 FR2642958 A1 FR 2642958A1
Authority
FR
France
Prior art keywords
characterized
plate
system according
screws
plates
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Withdrawn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
FR8902053A
Other languages
French (fr)
Inventor
Claude Niney
Arsene Grosse
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.)
LYON ALEMAND LOUYOT COMPTOIR
LOUYOT COMPTOIR LYON ALEMAND
Original Assignee
LYON ALEMAND LOUYOT COMPTOIR
LOUYOT COMPTOIR LYON ALEMAND
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 LYON ALEMAND LOUYOT COMPTOIR, LOUYOT COMPTOIR LYON ALEMAND filed Critical LYON ALEMAND LOUYOT COMPTOIR
Priority to FR8902053A priority Critical patent/FR2642958A1/en
Publication of FR2642958A1 publication Critical patent/FR2642958A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7059Cortical plates
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Threaded wires, pins or screws; Nuts therefor
    • A61B17/8625Shanks, i.e. parts contacting bone tissue
    • A61B17/863Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8061Cortical 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

Abstract

The subject of the present invention is a system for the implementation of surgical procedures intended, for example, for the treatment of fractures of the vertebral column or of degenerative or tumoral lesions of the type comprising at least one osteosynthesis plate and a set of screws 1 for fastening the plates. </ P> <P> According to the invention, each screw has, at its threaded portion, a core 2 of variable diameter; the smaller diameter portion being formed at the tip 3, and the larger diameter portion being formed at the head 4. </ P> <P> Application: Surgical Treatments. </ P>

Description

System for implementing surgical procedures for

  example to the treatment of fractures of the column

  vertebral or degenerative or tumor lesions.

  The present invention relates to a system for the implementation of surgical procedures intended for example to treat fractures of the spine or lesions

degenerative or tumoral.

  It is known that the treatment of fractures of the spine, certain degenerative lesions, primary or secondary tumoral lesions, is performed during surgical procedures requiring the use of so-called "osteosynthesis" plates. These plates are fixed definitively for example by means of screws and are intended to secure several vertebrae together, while maintaining

their spacing.

  In this way arthrodesis is performed (blocking the joint to be treated), while restoring the balance of the vertebral column and its normal curvature. This intervention allows

  also reduce fracture foci.

  However, the screws used so far have not been entirely satisfactory particularly because of their low anchoring power and insufficient mechanical properties. It has indeed been clinically observed fractures of screws and in some cases tearing due to the movements of the patient during

the convalescence.

  The present invention aims to overcome these drawbacks by providing a system for the implementation of surgical procedures of the aforementioned type, which provides a secure mechanical anchoring ensuring the definitive establishment of

osteosynthesis plates.

  The solution, according to the present invention, to solve this technical problem consists of a system characterized in that the screws for fixing the osteosynthesis plates have, at their threaded portion, a soul of variable diameter; the smaller diameter portion being formed at the tip, while the stronger portion

  diameter is formed at the level of the head.

  Such screws have a high anchoring power in the bone and a high mechanical strength towards the emerging part of the bone or in the portion passing through the plate. This conformation eliminates any risk of fracture or tearing of the screws, and by

  consequently, any undesirable displacement of the osteosynthesis plates.

  It is also known that the vertebrae are constituted by a bone of density and mechanical strength variable from one part to another of the vertebra. Thus, some

  parts are not conducive to obtaining a good mechanical anchorage.

  There is however on each vertebra an area called "vertebral pedicle" which is made of dense bone with high mechanical strength. It is therefore desirable to introduce the screws allowing fixation of the osteosynthesis plates at

  these areas of high mechanical strength.

  However, the distance between pedicles varies on the one hand, for the same individual along the spine, on the other hand

on the one hand, from one individual to another.

  The osteosynthesis plates known until now do not allow the surgeon to have a material allowing

  the setting up of the screws in previously determined zones.

  In particular, plates having perforations at regular intervals are known which, whatever the chosen value of the interval, can only make the location of the perforation coincide with the pedicular zone in a limited number of cases. Since the pedicle interval varies constantly, it is easy to see that a plate having perforations and screw housings at constant intervals can not coincide.

  that locally said perforations with the pedicle area.

  Therefore, it is impossible, during surgery to place all the screws perpendicular to the plate, and one must resolve to implement said screws either obliquely or in parts of

  vertebrae with insufficient mechanical strength.

  The movements of the patient induce torsion and bending forces in the spinal column that forces the screws and can cause them to tear. In this respect, it can be seen that the screws placed obliquely have a tendency to

  tearing and breaking very important.

  To overcome these drawbacks, it has been proposed osteosynthesis plates having perforations and screw housing oblong shape. This configuration makes it possible to choose with more freedom the location of the screw, preferably at

level of the pedicular areas.

  Nevertheless, the rigidity of such an assembly is diminished. The screws having the possibility to move longitudinally due to the oblong shape of the holes and the plates thus fixed do not allow to maintain a spacing

constant between two vertebrae.

  Another object of the present invention is to remedy the aforementioned drawbacks by proposing a system offering, for each patient, a solution for implanting the screws in the zone.

pedicle of each vertebra.

  The system according to the present invention, to solve this technical problem, is characterized in that it comprises a set of osteosynthesis plates whose perforations and screw head housings are arranged in different configurations, so as to guarantee , for each

  patient, the coincidence with at least two pedicular areas.

  According to a particular characteristic of the invention, the perforations and the aforementioned housings are arranged - either at variable intervals on the same plate, - or at regular intervals on a plate, said intervals

varying from one plate to another.

  Advantageously, the aforementioned intervals vary on a

  same plate or plate to another from 12.5 to 17.5 mm.

  The invention will be better understood and other purposes, features and advantages thereof will become more apparent

  clearly on reading the explanatory description which will follow

  with reference to the attached schematic drawings given by way of non-limiting example illustrating a presently preferred embodiment of the invention and in which: - Figure la is a longitudinal sectional view of a screw of a system according to the invention; FIG. 1b is an enlarged view of a detail of FIG. 1; - Figure 2a is a sectional view of an osteosynthesis plate of a system according to the invention; FIG. 2b is a view from above of the osteosynthesis plate represented in FIG. 2; FIG. 1 shows a screw of a system for carrying out surgical procedures in accordance with the invention. This screw generally represented by the reference numeral 1 comprises a central core 2 of variable diameter, the smaller diameter portion being formed at the tip 3 of the screw, while the portion of larger diameter is formed at the level of

his head 4.

  The diameter may increase continuously or

  discontinuous towards the near part of the head.

  The central core 2 supports a net with high anchoring power, a detail of which is shown in FIG. The shape of this net as shown in Figures la and lb is part

  integral part of this description.

  Figures 2a and 2b show an osteosynthesis plate of a system according to the invention. Such a plate 10 comprises

  a set of perforations and housings 11 of screw head.

  According to the invention, a set of plates of variable lengths having different configurations is produced. For example, for the arthrodesis of three vertebrae, a set of

  several five-hole plates as shown in the figures.

  Each of these plates is characterized by a gap between

  perforations different from the intervals of the other plates.

  It is thus conceivable that the surgeon can choose at the time of the intervention from this set of plates, those which coincide best with the pedicle intervals of the patient, in the operated area, which makes it possible to install a screw of the

perpendicular to the pedicle.

  In the example shown, the plate 10 of a series of five-hole plates has three perforations k, 1, m, intended to come into coincidence with three pedicle areas and two intermediate holes optionally for receiving complementary screws. On the same principle, we will perform a seven-hole plate set for operations involving four vertebrae and so

right now.

  The perforations and the housings may be arranged in a regularly spaced manner on each plate, the intervals between two successive holes varying from one plate to another. Punctures and housings can also be

  arranged at varying intervals on each plate.

  In both cases, the gaps between two holes

  successive ones can vary from 12.5 to 17.5 mm.

  In addition, the osteosynthesis plates may be straight or have a slight radius of curvature (FIGS. 2a and 2b) and be reversible, ie they may be used on the concave face or

on the convex side.

  The system for the implementation of surgical procedures that has just been described has numerous advantages: - It offers a solution for simple implantation of the screws in the pedicular zone of each vertebra; - It guarantees resistance to tearing and fracturing screws.

Claims (7)

  1. System for the implementation of surgical interventions intended for example for the treatment of fractures of the spine or degenerative or tumoral lesions, of the type comprising at least one osteosynthesis plate and a set of screws for fixing said plates , characterized in that said screws (1) have, at their threaded portion, a core (2) of variable diameter; the smaller diameter portion being formed at the tip (3) and the stronger portion
  diameter being formed at the head (4).
  2. System according to claim 1, characterized in that it comprises a set of osteosynthesis plates whose perforations and screw head housings are arranged in different configurations, so as to guarantee, for each
  patient, the coincidence with at least two pedicular areas.
  3. System according to claim 2, characterized in that the perforations and the housing (11) above are arranged
  at varying intervals on the same plate.
  4. System according to claim 2, characterized in that the perforations and the housing (11) above are arranged at regular intervals on a plate, said intervals
varying from one plate to another.
  5. System according to claim 3 or 4, characterized in that the abovementioned intervals vary on the same plate or a
  plate to another from 12.5 to 17.5 mm.
  6. System according to one of claims 1 to 5,
  characterized in that the aforementioned osteosynthesis plates
  have a slight radius of curvature.
  7. System according to one of claims 1 to 6,
  characterized in that the central core (2) of each aforementioned screw supports a net with high anchoring power whose shape is as shown in Figure lb.
FR8902053A 1989-02-16 1989-02-16 System for implementing surgical interventions, such as the treatment of fractures of the vertebral column or of degenerative or tumoral lesions Withdrawn FR2642958A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8902053A FR2642958A1 (en) 1989-02-16 1989-02-16 System for implementing surgical interventions, such as the treatment of fractures of the vertebral column or of degenerative or tumoral lesions

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8902053A FR2642958A1 (en) 1989-02-16 1989-02-16 System for implementing surgical interventions, such as the treatment of fractures of the vertebral column or of degenerative or tumoral lesions
IT1939390A IT1238696B (en) 1989-02-16 1990-02-16 System for the implementation of surgical interventions intended for example for the treatment of fractures of the spine or degenerative or tumor lesions
DE19904004941 DE4004941A1 (en) 1989-02-16 1990-02-16 Plate for repairing fracture of spinal column - is secured by screws with special screw thread

Publications (1)

Publication Number Publication Date
FR2642958A1 true FR2642958A1 (en) 1990-08-17

Family

ID=9378853

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8902053A Withdrawn FR2642958A1 (en) 1989-02-16 1989-02-16 System for implementing surgical interventions, such as the treatment of fractures of the vertebral column or of degenerative or tumoral lesions

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DE (1) DE4004941A1 (en)
FR (1) FR2642958A1 (en)
IT (1) IT1238696B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436885A2 (en) * 1989-12-21 1991-07-17 Anton Prof. Dr. Härle Auxiliary osteosynthesis screw
FR2680673A1 (en) * 1991-08-26 1993-03-05 Medical Op Device for stabilisation of a spine, in particular of the human spine, by a posterior route
EP0530585A2 (en) * 1991-09-03 1993-03-10 Synthes AG, Chur Self-locking resorbable screws and plates for internal fixation of bone fractures and tendon-to-bone attachment
WO1993015681A1 (en) * 1992-02-06 1993-08-19 Howmedica Inc. Pin with tapered root diameter
EP0669110A2 (en) * 1994-02-14 1995-08-30 SMITH &amp; NEPHEW DYONICS INC Interference screw having a double tapered root
WO1999011188A1 (en) * 1997-09-04 1999-03-11 Synthes Ag Chur Symmetrical bone plate
FR2768610A1 (en) * 1997-09-22 1999-03-26 Materiel Orthopedique En Abreg Osteosynthesis screw and manufacturing procedure
WO1999027864A3 (en) * 1997-11-29 1999-09-02 Philip Hobson Hardcastle Surgical implant and surgical fixing screw

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19751284A1 (en) 1997-11-19 1999-05-27 Leo Prof Dr Gotzen fixation element
US6767351B2 (en) 2000-02-01 2004-07-27 Hand Innovations, Inc. Fixation system with multidirectional stabilization pegs
US7695502B2 (en) 2000-02-01 2010-04-13 Depuy Products, Inc. Bone stabilization system including plate having fixed-angle holes together with unidirectional locking screws and surgeon-directed locking screws
US6706046B2 (en) 2000-02-01 2004-03-16 Hand Innovations, Inc. Intramedullary fixation device for metaphyseal long bone fractures and methods of using the same
US20040153073A1 (en) 2000-02-01 2004-08-05 Hand Innovations, Inc. Orthopedic fixation system including plate element with threaded holes having divergent axes
US7905909B2 (en) 2005-09-19 2011-03-15 Depuy Products, Inc. Bone stabilization system including multi-directional threaded fixation element
US7780664B2 (en) 2002-12-10 2010-08-24 Depuy Products, Inc. Endosteal nail
US7857838B2 (en) 2003-03-27 2010-12-28 Depuy Products, Inc. Anatomical distal radius fracture fixation plate
US7951176B2 (en) 2003-05-30 2011-05-31 Synthes Usa, Llc Bone plate
EP1741397B1 (en) 2003-08-26 2010-07-14 Synthes GmbH Bone plate
US8574268B2 (en) 2004-01-26 2013-11-05 DePuy Synthes Product, LLC Highly-versatile variable-angle bone plate system
DE202006019220U1 (en) 2006-12-19 2007-05-24 Zrinski Ag Orthopedic screw fastening system for fixing at bone of patient, has through-holes cut on one another so that intersection line and surfaces are produced in direction of plate thickness, where line and surfaces co-operate with head windings

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387636A1 (en) * 1977-04-22 1978-11-17 Straumann Inst Ag Plate osteosynthesis
EP0077681A2 (en) * 1981-10-16 1983-04-27 D. HOWSE &amp; COMPANY LIMITED Bone fixation screws
EP0266146A2 (en) * 1986-10-27 1988-05-04 JOHNSON &amp; JOHNSON CONSUMER PRODUCTS, INC. Absorbable bone plate
EP0274713A1 (en) * 1986-12-19 1988-07-20 Huta Baildon Przedsiebiorstwo Panstwowe A stabilizer for the treatment of fractures of the neck and upper metaphysis of the femur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387636A1 (en) * 1977-04-22 1978-11-17 Straumann Inst Ag Plate osteosynthesis
EP0077681A2 (en) * 1981-10-16 1983-04-27 D. HOWSE &amp; COMPANY LIMITED Bone fixation screws
EP0266146A2 (en) * 1986-10-27 1988-05-04 JOHNSON &amp; JOHNSON CONSUMER PRODUCTS, INC. Absorbable bone plate
EP0274713A1 (en) * 1986-12-19 1988-07-20 Huta Baildon Przedsiebiorstwo Panstwowe A stabilizer for the treatment of fractures of the neck and upper metaphysis of the femur

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436885A2 (en) * 1989-12-21 1991-07-17 Anton Prof. Dr. Härle Auxiliary osteosynthesis screw
EP0436885A3 (en) * 1989-12-21 1991-12-11 Anton Prof. Dr. Haerle Auxiliary osteosynthesis screw
FR2680673A1 (en) * 1991-08-26 1993-03-05 Medical Op Device for stabilisation of a spine, in particular of the human spine, by a posterior route
EP0530585A2 (en) * 1991-09-03 1993-03-10 Synthes AG, Chur Self-locking resorbable screws and plates for internal fixation of bone fractures and tendon-to-bone attachment
EP0530585A3 (en) * 1991-09-03 1994-01-19 Synthes Ag
WO1993015681A1 (en) * 1992-02-06 1993-08-19 Howmedica Inc. Pin with tapered root diameter
EP0669110A2 (en) * 1994-02-14 1995-08-30 SMITH &amp; NEPHEW DYONICS INC Interference screw having a double tapered root
EP0669110A3 (en) * 1994-02-14 1995-11-15 Smith & Nephew Dyonics Interference screw having a double tapered root.
WO1999011188A1 (en) * 1997-09-04 1999-03-11 Synthes Ag Chur Symmetrical bone plate
US6454770B1 (en) 1997-09-04 2002-09-24 Synthes (Usa) Symmetrical bone plate
FR2768610A1 (en) * 1997-09-22 1999-03-26 Materiel Orthopedique En Abreg Osteosynthesis screw and manufacturing procedure
US6083227A (en) * 1997-09-22 2000-07-04 Sofamor S.N.C. Bone screw and method for manufacturing said screw
WO1999027864A3 (en) * 1997-11-29 1999-09-02 Philip Hobson Hardcastle Surgical implant and surgical fixing screw
US6579290B1 (en) 1997-11-29 2003-06-17 Surgicraft Limited Surgical implant and surgical fixing screw

Also Published As

Publication number Publication date
DE4004941A1 (en) 1990-08-23
IT1238696B (en) 1993-09-01
IT9019393A1 (en) 1990-08-17
IT9019393D0 (en) 1990-02-16

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