Distraction pin for fracture fixation
First Claim
1. 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 shall 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.
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Accused Products
Abstract
An internal fixation pin comprises first and second portions with threads of different diameters, but having the same pitch and thread depth. The first portion includes a self-tapping tip. No enlarged head portion is provided to the pin at the end opposite the tip. A non-threaded shaft portion is frangibly connected to the second portion and is a mechanism for rotating the pin for threaded insertion into bone. A plurality of circumferentially spaced-apart longitudinal grooves are provided on the second portion adjacent its intersection with the shaft portion. After insertion of the first and second portions across a fracture, the shaft portion is removed. The grooves permit rotation of the pin for removal should removal be necessary. A driver for pin removal is also provided, as well as a mill tool.
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Citations
21 Claims
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1. A fracture fixation pin, comprising:
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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 shall 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A fracture fixation pin system, comprising:
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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 along substantially an entirety thereof, said 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. - View Dependent Claims (16)
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17. A fracture fixation pin, comprising:
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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 an outermost circumference of said second portion and extending crosswise through at least one of said second threads. - View Dependent Claims (18, 19)
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20. A fracture fixation pin system, comprising:
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a) a one-piece 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 of 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. - View Dependent Claims (21)
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Specification