Device for uniting bone fragments

• US 4,492,226 A
• Filed: 10/10/1979
• Issued: 01/08/1985
• Est. Priority Date: 10/10/1979
• Status: Expired due to Term

• Current Assignee: Vsesojuzny Nauchno-Issledovalelsky Ispytatelny Institut Meditsinskoi Tekhniki
• Original Assignee: Vsesojuzny Nauchno-Issledovalelsky Ispytatelny Institut Meditsinskoi Tekhniki
• Inventors: Belykh, Sergei I., Davydov, Anatoly B., Moschensky, Anatoly D., Smirnov, Boris A., Gromov, Mikhail V., Pershin, Gely G.
• Primary Examiner(s): Yasko, John D.
• Assistant Examiner(s): Shedd, C. W.
• Application Number:
  US06/083,310
• Time in Patent Office: 1,917 Days
• Field of Search: 128/92 BC, 128/92 BA, 128/92 D, 128/92 G
• US Class Current: 606/63
• CPC Class Codes: A61B 17/7258 with laterally expanding parts, e.g. for gripping the bone

Abstract

A device for uniting bone fragments comprises a rectilinear body and a contrivance for fixing it in the coapted bone fragments. The contrivance for fixing the body in the coapted bone fragments is formed by thrust members being the portions of the body located at the opposite ends thereof and having holes coaxial with the body; the holes being shaped as frustums of cones facing with their greater bases the ends of the body, and having annular grooves in the wall thereof, and cone-shaped inserts with annular ridges adapted to be introduced into the conical holes for wedging apart the body. The body has longitudinal through slots within the zones of the holes. The length of the device is less than the total length of the coapted bone fragments so as to be located fully within the bone tissues.

Claims

1. A device for uniting bone fragments, comprising:

a rectilinear body having a longitudinally-extending through bore formed therein;

holes coaxial to said body, provided at opposite end portions thereof and shaped as frustums of cones facing with their greater bases the respective ends of said body;

annular grooves made in the bore surfaces of said holes;

longitudinal through slots made in said end portions of said body within the zones of said holes;

cone-shaped inserts adapted for being introduced into said holes so as to wedge apart said body at the both ends thereof;

annular ridges made on said inserts and adapted to fit in said annular grooves so as to hold said inserts in positions wedging apart said end portions of said body;

said device featuring its length less than a total length of the coapted bone framents so that it can be arranged fully in the bone tissues.

2. A device for uniting bone fragments as claimed in claim 1, wherein the outer surface of said body has longitudinal recesses along the full length of the body.

3. A device for uniting bone fragments comprising:

a rectilinear body having holes shaped as frustums of cones coaxial with, and at opposite ends of, said body, with the greater bases of the cones being located at ends of said body;

cone-shaped inserts insertable into said holes; and

means for interlocking said inserts in said holes comprising at least one cooperating annular groove and annular ridge, said annular groove being formed in surfaces of both of said holes intermediate the bases of the frustums and said annular ridge being formed in surfaces of both of said inserts, said annular groove cooperating with said annular ridge to hold one of said inserts in a position wedging apart a respective end portion of said body.

4. A device according to claim 3, wherein the length of said body after insertion of said inserts is less than the total length of joined bone fragments so that said device is located within the joined bone fragments.

5. A device for uniting bone fragments as claimed in claim 3, wherein the outer surface of said body has longitudinal recesses along the full length thereof.