Double threaded orthopedic screw

A - Human Necessities – 61 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61B 17/86 (2006.01)

Patent

CA 2746032

An orthopedic screw having a thread with two parts, a distal and a proximal part, each having a different thread configuration. The distal section has a thread with outer dimension and pitch suitable for entry into cancellous bone, while the proximal section has a composite thread comprising (i) a first thread of the same or slightly larger outer diameter as the cancellous thread in the distal section, having the same pitch thereof, and lying on the same helix, and (ii) another thread having a smaller outer diameter but the same pitch as the first thread, but disposed on a helix displaced from that of the first thread, such that it lies between the crests of the first thread. This screw enables optimum fixation strength in a bone or bones having a harder cortical outer section and a softer cancellous inner section. The screw may have an unthreaded central section.

L'invention concerne une vis orthopédique ayant un filet à deux parties, une partie distale et une partie proximale, chacune présentant une configuration de filet différente. La section distale a un filet dont la dimension et le pas externes conviennent pour pénétrer dans un os spongieux, tandis que la section proximale a un filet composite comprenant (i) un premier filet d'un diamètre externe équivalent ou légèrement plus grand que le filet spongieux dans la section distale, ayant le même pas que celui-ci, et reposant sur la même hélice, et (ii) un autre filet ayant un diamètre externe plus petit mais un pas équivalent que le premier filet, mais il est disposé sur une hélice déplacée de celle du premier filet, de façon à reposer entre les crêtes du premier filet. Cette vis permet une force de fixation optimale dans un ou plusieurs os présentant une section corticale externe plus dure et une section interne spongieuse plus molle. La vis peut présenter une section centrale non filetée.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Double threaded orthopedic screw does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Double threaded orthopedic screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double threaded orthopedic screw will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2088784

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.