CA2476388A1 - Distraction pin for fracture fixation - Google Patents

Distraction pin for fracture fixation Download PDF

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Publication number
CA2476388A1
CA2476388A1 CA002476388A CA2476388A CA2476388A1 CA 2476388 A1 CA2476388 A1 CA 2476388A1 CA 002476388 A CA002476388 A CA 002476388A CA 2476388 A CA2476388 A CA 2476388A CA 2476388 A1 CA2476388 A1 CA 2476388A1
Authority
CA
Canada
Prior art keywords
threads
fracture fixation
fixation pin
diameter
grooves
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.)
Granted
Application number
CA002476388A
Other languages
French (fr)
Other versions
CA2476388C (en
Inventor
John Stanley Taras
Dennis L. Steffen
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
Publication of CA2476388A1 publication Critical patent/CA2476388A1/en
Application granted granted Critical
Publication of CA2476388C publication Critical patent/CA2476388C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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, 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
    • A61B17/86—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
    • A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
    • 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
    • A61B17/1637—Hollow drills or saws producing a curved cut, e.g. cylindrical
    • 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
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • 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
    • A61B17/88—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
    • A61B17/8883—Screwdrivers, spanners or wrenches characterised by the cross-section of the driver bit the driver bit acting on the periphery of the screw head
    • 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
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1686—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hand or wrist
    • 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
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8645—Headless screws, e.g. ligament interference screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
    • A61B2017/00464—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable for use with different instruments
    • 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
    • A61B2017/1602—Mills
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter

Abstract

An internal fixation pin (10) comprises first (12) and second portions (14) with threads of different diameters, but having the same pitch and thread depth. The first portion (12) includes a self-tapping tip (20). No enlarged head portion is provided to the pin at the end opposite the tip. A non- threaded shaft portion (26) is frangibly connected to the second portion (14 ) and is a mechanism for rotating the pin for threaded insertion into bone. A plurality of circumferentially spaced-apart longitudinal grooves (30) are provided on the second portion (14) adjacent its intersection with the shaft portion (26). After insertion of the first (12) and second portions (14) across a fracture, the shaft portion (26) is removed. The grooves (30) permi t rotation of the pin for removal should removal be necessary. A driver (40) f or pin removal is also provided, as well as a mill tool (60).

Claims (32)

1. A fracture fixation pin, comprising:
a) a first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end;
b) a second portion coupled to said second end of said first portion, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said second threads extending in a same direction as said first threads; and c) a non-threaded shaft portion coupled to said second portion, said shaft portion having a cross-sectional dimension which does not exceed a dimension of said second diameter.
2. A fracture fixation pin according to claim 1, wherein:
said first and second threads are continuous.
3. A fracture fixation pin according to claim 1, wherein:
said tip includes a plurality of cutting flutes.
4. A fracture fixation pin according to claim 1, wherein:
said tip is substantially conical and includes a surface angled at 30° relative to a longitudinal axis.
5. a fracture fixation pin according to claim 1, wherein:
said first portion has a first length of approximately 2.55 inches and a first diameter of approximately 0.125 inch, and said second portion has a second length of approximately 0.6 inch and a second diameter of approximately 0.156 inch.
6. A fracture fixation pin according to claim 1, wherein:
said shaft portion is substantially cylindrical.
7. A fracture fixation pin according to claim 1, wherein:
said shaft is frangibly coupled to second portion.
8. A fracture fixation pin according to claim 1, wherein:
a channel is provided about said pin between said second portion and said shaft portion.
9. A fracture fixation pin according to claim 1, wherein:
said shaft has cross-sectional dimension smaller than said second diameter of said second portion.
10. A fracture fixation pin according to claim 1, wherein:
said pin is not provided with a head portion.
11. A fracture fixation pin according to claim 1, wherein:
all threads on said first portion have said first thread diameter.
12. A fracture fixation pin according to claim 1, wherein:
said pin is made of metal.
13. A fracture fixation pin according to claim 1, wherein:
said second portion is provided with a plurality of longitudinal grooves adjacent said shaft portion and spaced-apart about a circumference of said second portion.
14. A fracture fixation pin according to claim 13, wherein:
said plurality of grooves includes exactly three grooves spaced apart 120° about said circumference of said second portion.
15. A fracture fixation pin according to claim 13, wherein:
each of said grooves has a depth which extends below said second threads.
16. A fracture fixation pin system, comprising:
a) a pin including i) a first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end, ii) a second portion coupled to said second end of said first portion, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said first and second threads being continuous with each other and having a common pitch and thread depth, and iii) a non-threaded shaft portion coupled to said second portion, said shaft portion having a cross-sectional dimension which does not exceed a dimension of said second diameter, said second portion adjacent said shaft portion defining a plurality of longitudinal spaced apart negative spaces; and b) a driver member including a socket having structure adapted to interfere with said negative spaces.
17. A fracture fixation pin system according to claim 16, further comprising:
c) a mill tool having structure adapted to remove bone and define an opening in the bone into which said socket of said driver member can be inserted.
18. A fracture fixation pin, comprising:
a) a first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end; and b) a second portion having a first end coupled to said second end of said first portion and a second free end, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said first and second threads being continuous with each other and having a common pitch and thread depth, wherein said second free end is provided with a plurality longitudinal grooves spaced-apart about a circumference of said second portion.
19. A fracture fixation pin according to claim 18, wherein:
said plurality of grooves includes three grooves spaced apart 120° about said circumference of the second portion.
20. A fracture fixation pin according to claim 18, wherein:
each of said grooves has a depth which extends below said second threads.
21. A fracture fixation pin system, comprising:
a) a pin including i) a first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end, and ii) a second portion having a first end coupled to said second end of said first portion and a second free end, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said first and second threads being continuous with each other and having a common pitch and thread depth, wherein said second free end is provided with a plurality longitudinal grooves spaced-apart about a circumference of said second portion; and b) a driver member including a socket having structure adapted to interfere with said grooves on said second portion of said pin.
22. A fracture fixation pin system according to claim 21, further comprising:
c) a mill tool having structure adapted to remove bone and define an opening in the bone into which said socket of said driver member can be inserted.
23. A fracture fixation pin, comprising:
a pin having a threaded portion provided with threads and a shaft portion, said threaded portion including a tip end and an opposite end, said opposite end including a plurality of longitudinal grooves adjacent said shaft portion and spaced-apart about a circumference of said threaded portion.
24. A fracture fixation pin according to claim 22, wherein:
said grooves interrupt said threads.
25. A fracture fixation pin according to claim 22, wherein:
said plurality of grooves comprise exactly three grooves spaced apart 120° about the circumference of the threaded portion.
26. A fracture fixation pin according to claim 22, wherein:
each of said grooves has a depth which extends below said threads at a location of said grooves.
27. A fracture fixation pin according to claim 22, wherein:
said threaded portion includes a first portion having a first diameter and first threads of a first thread diameter, and a second portion having a second diameter larger than said first diameter and second threads of a second thread diameter larger than said first thread diameter.
28. A fracture fixation pin according to claim 27, wherein:
said first and second threads are continuous with each other.
29. A fracture fixation pin according to claim 27, wherein:
said first and second threads have a common pitch.
30. A fracture fixation pin according to claim 27, wherein:
said first and second threads have a common thread depth.
31. A fracture fixation pin system, comprising:
a) a pin having a first portion provided with threads and a shaft portion, said first portion including a tip end and an opposite end, said opposite end including a plurality of longitudinal grooves adjacent said shaft portion and spaced-apart about a circumference of said first portion; and b) a driver member including a socket having structure adapted to interfere with said grooves on said first portion of said pin.
32. A fracture fixation pin system according to claim 31, further comprising:
c) a mill tool having structure adapted to remove bone and define an opening in the bone into which said socket of said driver member can be inserted.

171. A fracture fixation pin, comprising:
a) a solid first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end;
b) a solid second portion coupled to said second end of said first portion, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said second threads extending in a same direction as said first threads; and c) a solid non-threaded shaft portion coupled to said second portion, said shaft portion having a cross-sectional dimension which does not exceed a dimension of said second diameter, wherein said second portion is provided with a plurality of longitudinal grooves extending crosswise through at least one of said second threads, said grooves being located adjacent said shaft portion and spaced-apart about an outer circumference of said second portion.
2. A fracture fixation pin according to claim 1, wherein:
said first and second threads are continuous.
3. A fracture fixation pin according to claim 1, wherein:
said tip includes a plurality of cutting flutes.
4. A fracture fixation pin according to claim 1, wherein:
said tip is substantially conical and includes a surface angled at 30° relative to a longitudinal axis.
5. A fracture fixation pin according to claim 1, wherein:
said first portion has a first length of approximately 2.55 inches and a first diameter of approximately 0.125 inch, and said second portion has a second length of approximately 0.6 inch and a second diameter of approximately 0.156 inch.

6. A fracture fixation pin according to claim 1, wherein:
said shaft portion is substantially cylindrical.
7. A fracture fixation pin according to claim 1, wherein:
said shaft is frangibly coupled to second portion.
8. A fracture fixation pin according to claim 1, wherein:
a channel is provided about said pin between said second portion and said shaft portion.
9. A fracture fixation pin according to claim 1, wherein:
said shaft has cross-sectional dimension smaller than said second diameter of said second portion.
10. A fracture fixation pin according to claim 1, wherein:
said pin is not provided with a head portion.
11. A fracture fixation pin according to claim 1, wherein:
all threads on said first portion have said first thread diameter.
12. A fracture fixation pin according to claim 1, wherein:
said pin is made of metal.
13. A fracture fixation pin according to claim 1, wherein:
said plurality of grooves includes exactly three grooves spaced apart 120° about said circumference of said second portion.
14. A fracture fixation pin according to claim 1, wherein:
each of said grooves has a depth which extends below said second threads.
15. A fracture fixation pin system, comprising:
a) a pin including i) a first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end, ii) a second portion coupled to said second end of said first portion, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said first and second threads being continuous with each other and having a common pitch and thread depth, and iii) a non-threaded shaft portion coupled to said second portion, said shaft portion having a cross-sectional dimension which does not exceed a dimension of said second diameter, said second portion adjacent said shaft portion defining a plurality of longitudinal spaced apart negative spaces about an outer circumference thereof; and b) a driver member including a socket having structure adapted to interfere with said negative spaces.
16. A fracture fixation pin system according to claim 15, further comprising:
c) a mill tool having structure adapted to remove bone and define an opening in the bone into which said socket of said driver member can be inserted.
17. A fracture fixation pin, comprising:
a) a first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end; and b) a second portion having a first end coupled to said second end of said first portion and a second free end, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said first and second threads being continuous with each other and having a common pitch and thread depth, wherein said second free end is provided with a plurality of longitudinal grooves spaced-apart about an outer circumference of said second portion and extending crosswise through at least one of said second threads.

18. A fracture fixation pin according to claim 17, wherein:
said plurality of grooves includes three grooves spaced apart 120° about said circumference of the second portion.
19. A fracture fixation pin according to claim 17, wherein:
each of said grooves has a depth which extends below said second threads.
20. A fracture fixation pin system, comprising:
a) a pin including i) a.non-hollow first portion having a first diameter and first threads of a first thread diameter, said first portion having a tip at one end and a second end, and ii) a non-hollow second portion having a first end coupled to said second end of said first portion and a second free end, said second portion having a second diameter larger than said first diameter, and second threads of a second thread diameter larger than said first thread diameter, said first and second threads being continuous with each other and having a common pitch and thread depth, wherein said second free end is provided with a plurality longitudinal grooves spaced-apart about an outer circumference of said second portion; and b) a driver member including a socket having structure adapted to interfere with said grooves on said second portion of said pin.
21. A fracture fixation pin system according to claim 20, further comprising:
c) a mill tool having structure adapted to remove bone and define an opening in the bone into which said socket of said driver member can be inserted.
22. A fracture fixation pin, comprising:
a pin having a threaded portion provided with threads and a shaft portion, said threaded portion including a tip end and an opposite end, said opposite end including a plurality of longitudinal grooves extending parallel to a longitudinal axis of said pin and located adjacent said shaft portion and spaced-apart about an outer circumference of said threaded portion.
23. A fracture fixation pin according to claim 22, wherein:
said grooves interrupt said threads.
24. A fracture fixation pin according to claim 22, wherein:
said plurality of grooves comprise exactly three grooves spaced apart 120° about the circumference of the threaded portion.
25. A fracture fixation pin according to claim 22, wherein:
each of said grooves has a depth which extends below said threads at a location of said grooves.
26. A fracture fixation pin according to claim 22, wherein:
said threaded portion includes a first portion having a first diameter and first threads of a first thread diameter, and a second portion having a second diameter larger than said first diameter and second threads of a second thread diameter larger than said first thread diameter.
27. A fracture fixation pin according to claim 26, wherein:
said first and second threads are continuous with each other.
28. A fracture fixation pin according to claim 26, wherein:
said first and second threads have a common pitch.
29. A fracture fixation pin according to claim 26, wherein:
said first and second threads have a common thread depth.
30. A fracture fixation pin system, comprising:
a) a pin having a first portion provided with threads and a shaft portion, said first portion including a tip end and an opposite end, said opposite end including a plurality of longitudinal grooves adjacent said shaft portion and spaced-apart about an outer circumference of said first portion; and b) a driver member including a socket having structure adapted to interfere with said grooves on said first portion of said pin.
31. A fracture fixation pin system according to claim 30, further comprising:
c) a mill tool having structure adapted to remove bone and define an opening in the bone into which said socket of said driver member can be inserted.
CA2476388A 2002-02-15 2003-02-12 Distraction pin for fracture fixation Expired - Fee Related CA2476388C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/076,678 US6875215B2 (en) 2002-02-15 2002-02-15 Distraction pin for fracture fixation
US10/076,678 2002-02-15
PCT/US2003/004100 WO2003070117A1 (en) 2002-02-15 2003-02-12 Distraction pin for fracture fixation

Publications (2)

Publication Number Publication Date
CA2476388A1 true CA2476388A1 (en) 2003-08-28
CA2476388C CA2476388C (en) 2012-04-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2476388A Expired - Fee Related CA2476388C (en) 2002-02-15 2003-02-12 Distraction pin for fracture fixation

Country Status (7)

Country Link
US (2) US6875215B2 (en)
EP (1) EP1482844B1 (en)
AT (1) ATE467393T1 (en)
AU (2) AU2003217729A1 (en)
CA (1) CA2476388C (en)
DE (1) DE60332524D1 (en)
WO (2) WO2003070118A1 (en)

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US20050165402A1 (en) 2005-07-28
WO2003070118A1 (en) 2003-08-28
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AU2003217729A1 (en) 2003-09-09
US20030158556A1 (en) 2003-08-21
EP1482844B1 (en) 2010-05-12
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US6875215B2 (en) 2005-04-05
CA2476388C (en) 2012-04-24
AU2003209115A1 (en) 2003-09-09

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