WO1995022290A1 - Broches et fils osseux pour la fixation de fractures et guides-fils directionnels - Google Patents

Broches et fils osseux pour la fixation de fractures et guides-fils directionnels Download PDF

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Publication number
WO1995022290A1
WO1995022290A1 PCT/US1995/002180 US9502180W WO9522290A1 WO 1995022290 A1 WO1995022290 A1 WO 1995022290A1 US 9502180 W US9502180 W US 9502180W WO 9522290 A1 WO9522290 A1 WO 9522290A1
Authority
WO
WIPO (PCT)
Prior art keywords
pin
shaft
annular surface
distal portion
abrading means
Prior art date
Application number
PCT/US1995/002180
Other languages
English (en)
Inventor
Robert M. Campbell, Jr.
Original Assignee
Campbell Robert M Jr
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 Campbell Robert M Jr filed Critical Campbell Robert M Jr
Priority to AU19260/95A priority Critical patent/AU1926095A/en
Publication of WO1995022290A1 publication Critical patent/WO1995022290A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1697—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans specially adapted for wire insertion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • A61B17/846—Nails or pins, i.e. anchors without movable parts, holding by friction only, with or without structured surface
    • A61B17/848—Kirschner wires, i.e. thin, long nails
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B2017/320004—Surgical cutting instruments abrasive

Definitions

  • Applicant's invention relates to orthopaedic apparatuses, and more particularly to apparatuses useful in fixation of osseous fractures.
  • osseous pins and wires are frequently used to treat fractures and, on occasion, to serve as a guide for directing placement of orthopaedic screws and other implants.
  • an orthopaedic pin or wire
  • the pin then stabilizes bone segments as against relative movement which might otherwise disrupt the healing process.
  • Optimum placement of an orthopaedic wire or pin involves the wire or pin traversing the fracture gap between bone segments in an orientation which is substantially perpendicular to a plane which is generally defined by the fracture.
  • Such optimum placement of pins and wire is often difficult, if not impossible using presently available pins and wires.
  • the reason for this difficulty lies in the typical relationship between the orientations of most fractures and the orientation of the fractured bone's cortex. Because virtually no fracture which may be suitably treated using pins and wires will be oriented parallel to the exterior surface of the cortex, a properly directed pin or wire must enter the bone obliquely to its surface. Without the benefit of a "pilot hole” or other means for facilitating the preferred point of entry and/or angle of entry, precisely proper placement and orientation of pins and wires is elusive in many, if not most pin or wire fixation situations.
  • a pin or wire passes through the cortex, its angle of approach to the fracture site is substantially, irreversibly fixed, whether the trajectory is the desired one or not. This is the result of the only cutting surface lying at the distal tip of presently available pins or wires.
  • the channel which is formed proximal to the cutting tip of the wire or pin as the pin or wire passes through the osseous tissue defines the orientation of any further progress through the tissue. If the initial orientation is not as desired, the surgeon must either begin anew by cutting a new path, or accept the less than optimal wire or pin orientation.
  • Applicant's present invention provides a design for an improved orthopaedic pin or wire a distal length of which, in addition to the distal tip, exhibits abrading surface features.
  • An orthopaedic pin or wire of Applicant's invention permits its user to enter the cortex of a recipient bone at essentially any convenient orientation and, after entering the cortex at precisely the desired point of entry, to change orientation of the pin or wire with the abrading surfaces acting as a rasp to form a channel through which the pin or wire can be rotated to the orientation needed to properly approach and span a fracture.
  • FIG. 1 is an elevational view of a currently available osseous pin.
  • Fig. 2 is an elevational depiction of the first stage of an attempted implantation of a current osseous pin at a trajectory oblique to the recipient bone's cortex.
  • Fig. 3 is a depiction of an accidental diversion of a current osseous pin resulting from the attempted pin trajectory depicted in Fig. 2.
  • Fig. 4 depicts a more typical, compromising entry trajectory for entering the cortex of a recipient bone and the inability to correct the trajectory with currently available pins.
  • Fig. 5 depicts the less than desirable pin orientation resulting from the entry trajectory initiated in the step depicted in Fig. 4.
  • Fig. 6 is an elevational view of an osseous pin of Applicant's invention.
  • Fig. 7 is a partial elevational view of the distal portion of a pin of Applicant's invention having as its abrading means knurl nodes carved or etched into the pin's surface.
  • Fig. 8 is a partial elevational view of the distal portion of a pin of Applicant's invention having as its abrading means helical flutes carved or etched into the pin's surface.
  • Fig. 9 is an elevational depiction of an orthopaedic pin of Applicant's invention at three progressive stages of implantation: (1) prior to entry into the cortex; (2) after entry into the cortex, but at a first trajectory; and (3) after correction to a second, optimum trajectory for traversing a fracture.
  • Pin 10 includes a chisel-type distal drilling tip 12 as is common to most presently available orthopaedic pins or wires. A length of the distal end of pin 10 exhibits a textured surface which forms pin 10's lateral abrading surface 14. Abrading surface 14 may be formed on the surface of pin 10 in several alternative ways.
  • the preferred embodiment of Applicant's pin 10 exhibits a knurled surface which is formed in metal milling operations as are amply known in the art. Hundreds of knurl nodes 16 are formed as node defining furrows 18 are cut into the surface of pin 10. Laser etching can also be used to form less pronounced nodes 16.
  • Applicant's pin 10 exhibits a more randomly textured abrading surface 14 which is forme by "sand t ting" a distal length of pin 10 using abras .e particl projected against pin 10 with compressed air. This alternative embodiment exhibits a less abrasive, almost matte like finish which may be preferred by some surgeons.
  • a still further alternative embodiment of Applican •s pin 10 is endowed with its abrading surface through application of an abrasive coating, such as an approved implant material which is applied to pin 10's surface, rather than a texturing of pin 10's metal itself.
  • This third embodiment of Applicant's invention is not considered to be the preferred embodiment because the addition of the abrasive coating slightly increases the pin's diameter (unless the distal portion of pin 10 is reduced in diameter precisely enough to compensate for the thickness of the coating) .
  • the increased diameter of the distal portion of pin 10 having the abrasive coating will form a passage of slightly greater diameter than the more proximal lengths of pin 10 thus causing a looser fit between bone and pin.
  • pin 10 is straight forward. Initial entry into a recipient bone may be made at virtually any desired angle using a standard orthopaedic drill. Unlike when using prior art pins or wires, however, the trajectory of pin 10 can be quickly and easily “corrected” to the ultimately desired trajectory by simply pivoting pin 10 toward the desired orientation thereby allowing abrading surface 14 to cut a furrow in the osseous tissue to allow change in pin 10 orientation. Once the optimum orientation is achieved, pin 10 is simply advanced to its final implantation position.
  • Applicant's pin 10 provides a unique opportunity for increased safety and reduction in procedure time which is unavailable through use of any prior art orthopaedic wire or pin.
  • the ease with which corrections in orientation can be effected during implantation of pin 10 virtually eliminates the need for multiple attempts to optimally position pin 10 as would attend the use of any prior art pin or wire.
  • pin 10 forms its own canal and need not be preceded by any other instrument, drill bit or otherwise, steps in the implantation of wires or pins are eliminated. These factors reduce operating room time and, by simple virtue of reducing the time luring which the procedure is under way, reduce the likelihood of infection. It also enables easier use for percutaneous fixation of bone and guide wire placement where a pre-drilled implant canal for passage of a pin, wire or guide pin is often difficult or impossible o find percutaneously.
  • pin 10 In addition to reducing the number of ⁇ 3 and instruments involved in implanting Applicant's m 10, which is a worthy objective itself, pin 10 obviates any motivation to use traditional drill bits to correct the orientation of a pin or wire canal. Drill bits tend to snare surrounding tissue causing substantial tissue damage, increased bleeding and increased risk of infection.

Landscapes

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

Abstract

L'invention concerne des broches et fils orthopédiques de conception améliorée utilisés pour la fixation de fractures osseuses, et des broches de guidage pour vis ou autres implants. La partie distale des broches et des fils selon l'invention présente une surface abrasive permettant d'aléser le pourtour du cortex d'un os lorsque la trajectoire de la broche doit être rectifiée après son introduction initiale dans le cortex. Cette possibilité de rectifier l'orientation de la broche ou du fil après la formation de la brèche dans le cortex est particulièrement avantageuse lorsque la broche ou le fil, dont la trajectoire est déterminée en fonction de l'orientation de la fracture, est oblique lorsqu'elle pénètre dans le cortex.
PCT/US1995/002180 1994-02-18 1995-02-21 Broches et fils osseux pour la fixation de fractures et guides-fils directionnels WO1995022290A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU19260/95A AU1926095A (en) 1994-02-18 1995-02-21 Osseous pins and wires for fracture fixation and directional guide wires

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US19882394A 1994-02-18 1994-02-18
US08/198,823 1994-02-18

Publications (1)

Publication Number Publication Date
WO1995022290A1 true WO1995022290A1 (fr) 1995-08-24

Family

ID=22735011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/002180 WO1995022290A1 (fr) 1994-02-18 1995-02-21 Broches et fils osseux pour la fixation de fractures et guides-fils directionnels

Country Status (2)

Country Link
AU (1) AU1926095A (fr)
WO (1) WO1995022290A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003092A1 (fr) * 2013-07-03 2015-01-08 Acumed Llc Organe de fixation orientable pour os

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905080A (en) * 1972-03-24 1975-09-16 Buckbee Mears Co Abrading devices
US4177524A (en) * 1976-05-14 1979-12-11 Pfaudler-Werke A.G. Medical securement element with abrasive grains on thread surface
US4858603A (en) * 1988-06-06 1989-08-22 Johnson & Johnson Orthopaedics, Inc. Bone pin
US4978350A (en) * 1986-10-13 1990-12-18 Jaquet Orthopedie S.A. Transcutaneous pin for fixation of a bone part or fragment
US5055105A (en) * 1989-10-11 1991-10-08 Bowen & Company, Ltd. Bone drill bit
US5201733A (en) * 1992-01-21 1993-04-13 Etheredge Iii James L Method and apparatus for internal fixation of fractures

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905080A (en) * 1972-03-24 1975-09-16 Buckbee Mears Co Abrading devices
US4177524A (en) * 1976-05-14 1979-12-11 Pfaudler-Werke A.G. Medical securement element with abrasive grains on thread surface
US4978350A (en) * 1986-10-13 1990-12-18 Jaquet Orthopedie S.A. Transcutaneous pin for fixation of a bone part or fragment
US4858603A (en) * 1988-06-06 1989-08-22 Johnson & Johnson Orthopaedics, Inc. Bone pin
US5055105A (en) * 1989-10-11 1991-10-08 Bowen & Company, Ltd. Bone drill bit
US5201733A (en) * 1992-01-21 1993-04-13 Etheredge Iii James L Method and apparatus for internal fixation of fractures

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ORTHOPEDIC CATALOG, RICHARDS MFG. CO., MEMPHIS, TENN., 25 March 1975, p. 118. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003092A1 (fr) * 2013-07-03 2015-01-08 Acumed Llc Organe de fixation orientable pour os
GB2530960A (en) * 2013-07-03 2016-04-06 Acute Innovations Llc Steerable fastener for bone
US9848930B2 (en) 2013-07-03 2017-12-26 Acumed Llc Steerable fastener for bone

Also Published As

Publication number Publication date
AU1926095A (en) 1995-09-04

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