# US 9,079,263 B2 · Orthopedic fastener method

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- Number: US 9,079,263 B2
- Document ID: US9079263B2
- Status: Granted
- Kind: B2
- Application number: 13/573,137
- Filed: 2012-08-24
- Published: 2014-02-27
- Granted: 2015-07-14
- Earliest claimed: 2012-08-24
- Assignees: RTG Scientific, LLC
- Applicants: Gary Reed
- Inventors: Gary Reed
- Web page: https://patentgrep.com/patent/US9079263B2

## CPC

- B23G 1/02: on an external or internal cylindrical or conical surface, e.g. on recesses (B23G1/16, B23G1/22, B23G1/32, B23G1/36 take precedence)
- A61B 17/8625: {Shanks, i.e. parts contacting bone tissue}
- A61B 17/8635: {Tips of screws}
- A61B 2017/00526: {Methods of manufacturing}
- B23G 2210/08: External threads
- B23G 2210/48: Threads having a special form or profile not otherwise provided for
- Y10T 82/10: Process of turning
- B23G: THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH (making helical grooves by turning B23B5/48, by milling B23C3/32, by forging, pressing, or hammering B21K1/56, by grinding B24B19/02; arrangements for copying or controlling B23Q; thread-forming by corrugating tubes B21D15/04, by rolling B21H3/02)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An orthopedic structure includes a method for making a threaded fastener with thread geometry and leading edge geometry which provides greater precision during installation. Specifically, thread pitch and tooth profiles are independently variable. A leading portion of the fastener advances bone shards forward of the forward of the fastener to reduce insertion torque and prevent the shards from residing in the upstream tooth profile for better retention.

## Claims

### Claim 1

A process for forming an orthopedic fastener wherein the orthopedic fastener is adapted to be inserted into a skeletal structure, the steps including:
forming an interlocking thread on a substantially cylindrical stock of orthopedic grade substrate,
forming first (19) and second facets (23) of said interlocking thread on said substrate with a first cutting tool while inducing relative rotation between the substrate and the first cutting tool and providing clearance for a second cutting tool,
forming a third facet (20) on said substrate with a second cutting tool while still inducing rotation, and providing clearance for a third cutting tool,
forming fourth (21) and fifth facets (22) on said substrate with a third cutting tool while inducing counter rotation whereby counter rotation improves thread profile.

### Claim 2 (depends on 1)

The process of claim 1, further including counter rotating said substrate and forming a self-tapping cutting means on a distal end of said substrate thereby forming a fastener which advances bone fragments forward away from said interlocking threads.