Surgery – Instruments – Orthopedic instrumentation
Patent
1994-02-14
1995-10-10
Graysay, Tamara L.
Surgery
Instruments
Orthopedic instrumentation
411426, 411395, 411311, A61B 1758, A61B 1786
Patent
active
054566851
ABSTRACT:
An dual tapered orthopedic fixation screw is used to anchor ligament grafts inside a bore in a bone mass. The fixation screw includes a root portion having a front section, a cylindrical center section and a back section. A screw thread is formed over substantially the entire root portion to increase purchase. A taper is formed on the back of the root portion to increase compression of the fixation screw against the ligament graft. The screw further includes a rounded portion that is formed between the taper and the back end of the root to prevent the screw from fraying or cutting the ligament.
REFERENCES:
patent: 3701372 (1972-10-01), Breed
patent: 4468200 (1984-08-01), Munch
patent: 4537185 (1985-08-01), Stednitz
patent: 4632100 (1986-12-01), Somers et al.
patent: 4772286 (1987-02-01), Goble et al.
patent: 4870957 (1989-10-01), Goble et al.
patent: 4927421 (1990-05-01), Goble et al.
patent: 4950270 (1990-08-01), Bowman
patent: 5211647 (1993-05-01), Schmieding
patent: 5226766 (1993-07-01), Lasner
patent: 5252016 (1993-10-01), Schmid et al.
Arthrex, The Arthrex Transtibial ACL Reconstruction System, pp. 1-32.
Bach, Jr., B. R., Potential Pitfalls of Kurosaka Screw Interference Fixation for ACL Surgery, The American Journal of Knee Surgery, vol. 2, No. 2, Apr. 1989, pp. 76-82.
Howemedia, Specialty Screws.
Ivey, Marty and Li, Fan, Tensile Strength of Soft Tissue Fixations About the Knee, The American Journal of Knee Surgery, vol. 4, No. 1, Jan., 1991, pp. 18-23.
Kurosaka, M., A Biomechanical Comparison of Different Surgical Techniques of Graft Fixation in Anterior Cruciate Ligament Reconstruction, The American Journal of Sports Medicine, vol. 15, No. 3, 1987, pp. 225-229.
Kurasaka, M., Interference Fixation Screw System.
Matthews, L. S., Pitfalls in the Use of Interference Screws for Anterior Cruciate Ligament Reconstruction: Brief Report, The Journal of Arthroscopic and Related Surgery, vol. 5, No. 3, Raven Press, Ltd, 1989, pp. 225-226.
Graysay Tamara L.
Markow Scott B.
Smith & Nephew Dyonics Inc.
LandOfFree
Interference screw having a tapered back root does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interference screw having a tapered back root, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interference screw having a tapered back root will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2307787