Bone screw

Details Bone screw Bone screw

1998-03-13

1999-07-20

Tucker, Guy V.

Surgery

Instruments

Orthopedic instrumentation

A61B 1786

Patent

active

059250488

ABSTRACT:
A self-drilling, self-tapping screw for use in repairing broken bones. The screw is made of a high strength material selected from the group consisting of titanium alloys, chrome cobalt, and high strength resinous polymer. The screw has threw segments: a tip region, a body region and a head region. The tip and body regions have a retention thread formed over substantially their entire lengths. The tip has an included angle .alpha. in the range between 45.degree. and 50.degree.. The head region is specifically designed to maximize the torque it can withstand and minimize the amount of material removed in formation of the recess. The head has a generally frusto-conical shape with an included angle of between 90.degree. and 120.degree. to prevent pull through while minimizing the head's profile. The retention threads on the tip region and the body region have similar shapes and pitches with the pitch on the tip region being slightly smaller than the pitch on the body region. Each of the retention threads has a lead angle between 48.degree. and 52.degree., and a trailing angle between 98.degree. and 102.degree., as measured from the centerline of the screw.

REFERENCES:
patent: 3236141 (1966-02-01), Smith
patent: 5098434 (1992-03-01), Serbousek
patent: 5372598 (1994-12-01), Luhr et al.
patent: 5470334 (1995-11-01), Ross et al.
patent: 5486176 (1996-01-01), Hildebrand et al.
patent: 5601553 (1997-02-01), Trebing et al.

Affiliated with

Also associated with

Rating

Bone 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 Bone screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bone screw will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1317405