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WO1998027883A1 - Vis osseuse et lame de tournevis capable de maintenir la vis - Google Patents

Vis osseuse et lame de tournevis capable de maintenir la vis Download PDF

Info

Publication number
WO1998027883A1
WO1998027883A1 PCT/TR1996/000006 TR9600006W WO9827883A1 WO 1998027883 A1 WO1998027883 A1 WO 1998027883A1 TR 9600006 W TR9600006 W TR 9600006W WO 9827883 A1 WO9827883 A1 WO 9827883A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
screwdriver
tip
screwdriver blade
blade
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/TR1996/000006
Other languages
English (en)
Inventor
Mehmet Emin Mavili
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 PCT/TR1996/000006 priority Critical patent/WO1998027883A1/fr
Priority to AU11141/97A priority patent/AU1114197A/en
Publication of WO1998027883A1 publication Critical patent/WO1998027883A1/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
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8875—Screwdrivers, spanners or wrenches
    • A61B17/8886—Screwdrivers, spanners or wrenches holding the screw head
    • 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
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • 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
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8875—Screwdrivers, spanners or wrenches
    • A61B17/8877—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit

Definitions

  • the invention concerns a screwdriver blade and a bone screw system in which the screwdriver has the capability of holding the screw and delivering it to application site for plate-screw fixation of bone segments in surgery.
  • Plate and screw fixation is the treatment of choice for stabilization of bone fractures following craniofacial trauma or other trauma or for stabilization of bone segments after correction of cranial, maxillofacial or other bone deformities.
  • the surgeon is obliged to apply plates and screws for stabilization of a fracture deep in the operative field, through a relatively small incision.
  • the surgeon needs a screwdriver which will retain a screw on the tip for delivering and twisting the screw in the desired site.
  • Many types of screwdrivers and screws have been described for this purpose. Some of these techniques use wax to attach the screwdriver to the screw (Munro IR: The Luhr Fixation system for the Craniofacial Skeleton.
  • Screwdrivers with variously shaped interference fit systems are not either very efficient from the beginning or loose their efficacy in a short time due to metallic erosion of their tips.
  • screwdrivers with screw holding sleeves are successful to some degree they are not ideal.
  • the sleeves on the screwdriver add an extra thickness to the shank. This situation has some drawbacks.
  • the sleeves may lose their screw holding capability in time due to deformation and erosion of the metal. Spring-loaded self retaining mechanisms also lose their efficacy in a short time due to deformation of the spring.
  • a bone screw which has a cylindrical groove on the bottom of its slot and a screwdriver which has a tip with equal or smaller but opposite faces.
  • This system represents a further development of already existing systems.
  • the bone screw is retained on the screwdriver without any sleeves with improved visibility.
  • the bone screw is more securely held on the screwdriver and easily handled in restricted surgical sites.
  • This type of screw head and screwdriver tip interference ensures a good surface contact and therefore a better twisting power.
  • Figure 1 is a three dimensional oblique view illustrating the tip of the screwdriver blade mentioned in this invention.
  • Figure 2 is a longitudinal cross-sectional view of the bone screw to be used with the screwdriver described in figure 1 .
  • Figure 3 is a longitudinal cross-sectional view of the screwdriver blade holding the bone screw.
  • Figure 1 illustrates the screwdriver blade with a cylindrical protuberance on its tip from an oblique view.
  • the blade 1 has a cylindrical protuberance 2 on the tip.
  • the longitudinal axis of the cylinder is perpendicular to the axis of the shaft 3.
  • the diameter of the circle forming the base 4 of the cylinder is equal to or slightly different from the diameter of the circle forming the top 5 of the cylinder.
  • the portion of the blade just below the protuberance 6 has a thickness equal to or smaller than the width of the slit on the screw head . Then the thickness of the blade gradually increases until it reaches the thickness of the shaft 3.
  • FIG 2 illustrates the bone screw 7 to be used with this screwdriver blade 1 .
  • the screw has a head 8 being, at least in a portion, hemispherical.
  • the screw has a slit 9 on its head with a width greater than thickness of the blade just below the protuberance 6. As the slit goes deeper, the width of the slit increases forming a cylindrical groove 10 with a diameter which is equal to or greater than both top and bottom diameters of the cylinder forming the tip of the screwdriver blade.
  • Figure 3 illustrates the use of described screwdriver blade 1 placed into the slot 10 of the described bone screw 7.
  • the protuberance 2 on the tip of the screwdriver is slipped into the slot 10 on the head 8 of the bone screw, the side with smaller diameter entering first.
  • the screwdriver is pulled upwards and detached from the screw.
  • the blade is used as a changeable blade mounted on a handle.

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)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Neurology (AREA)
  • Surgical Instruments (AREA)

Abstract

Lame (1) de tournevis interchangeable qui possède à sa pointe une protubérance cylindrique (2) perpendiculaire à l'axe de la tige, et vis osseuse (7) dotée d'une rainure cylindrique (10) au fond de sa fente, la pointe de la lame du tournevis étant dotée de faces opposées. Les diamètres de la base et de la partie supérieure du cylindre situé sur la pointe de la lame de tournevis peuvent être égaux ou légèrement différents. La partie (6) de la lame se trouvant juste au-dessus de la protubérance cylindrique (2) possède une épaisseur qui lui permet d'être introduite dans la fente (9) située sur la tête de vis. La protubérance cylindrique (2) située sur la pointe du tournevis est glissée dans la rainure (10) ménagée dans la tête (8) de la vis depuis un des côtés, ce qui permet au tournevis de maintenir solidement la vis destinée à être utilisée dans la fixation d'os par plaque et vis.
PCT/TR1996/000006 1996-12-20 1996-12-20 Vis osseuse et lame de tournevis capable de maintenir la vis Ceased WO1998027883A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/TR1996/000006 WO1998027883A1 (fr) 1996-12-20 1996-12-20 Vis osseuse et lame de tournevis capable de maintenir la vis
AU11141/97A AU1114197A (en) 1996-12-20 1996-12-20 Bone screw and screwdriver blade with screw holding capability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR1996/000006 WO1998027883A1 (fr) 1996-12-20 1996-12-20 Vis osseuse et lame de tournevis capable de maintenir la vis

Publications (1)

Publication Number Publication Date
WO1998027883A1 true WO1998027883A1 (fr) 1998-07-02

Family

ID=21620725

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR1996/000006 Ceased WO1998027883A1 (fr) 1996-12-20 1996-12-20 Vis osseuse et lame de tournevis capable de maintenir la vis

Country Status (2)

Country Link
AU (1) AU1114197A (fr)
WO (1) WO1998027883A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103974669A (zh) * 2011-12-06 2014-08-06 新特斯有限责任公司 用于螺钉的自保持结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130152A (en) * 1977-10-19 1978-12-19 John Sawyer Slot-head fastener and driver therefor
US4526071A (en) * 1978-04-19 1985-07-02 Melvin Post Screwdriver and joining device
US5108399A (en) * 1988-09-17 1992-04-28 Boehringer Ingelheim Gmbh Device for osteosynthesis and process for producing it
WO1993021848A1 (fr) * 1992-04-28 1993-11-11 Huene Donald R Vis a os resorbable et son outil d'insertion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130152A (en) * 1977-10-19 1978-12-19 John Sawyer Slot-head fastener and driver therefor
US4526071A (en) * 1978-04-19 1985-07-02 Melvin Post Screwdriver and joining device
US5108399A (en) * 1988-09-17 1992-04-28 Boehringer Ingelheim Gmbh Device for osteosynthesis and process for producing it
WO1993021848A1 (fr) * 1992-04-28 1993-11-11 Huene Donald R Vis a os resorbable et son outil d'insertion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103974669A (zh) * 2011-12-06 2014-08-06 新特斯有限责任公司 用于螺钉的自保持结构
US9381054B2 (en) 2011-12-06 2016-07-05 DePuy Synthes Products, Inc. Self holding feature for a screw

Also Published As

Publication number Publication date
AU1114197A (en) 1998-07-17

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