# US 2014/0195003 A1 · System and method for altering rotational alignment of bone sections

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- Number: US 2014/0195003 A1
- Document ID: US20140195003A1
- Status: Published application
- Kind: A1
- Application number: 14/146,336
- Filed: 2014-01-02
- Published: 2014-07-10
- Earliest claimed: 2011-02-14
- Assignees: Ellipse Technologies, Inc.
- Applicants: Ellipse Technologies, Inc.
- Inventors: Scott Pool
- Web page: https://patentgrep.com/patent/US20140195003A1

## CPC

- A61B 17/7216: {for bone lengthening or compression (A61B17/7258 takes precedence)}
- A61B 17/1725: {for applying transverse screws or pins through intramedullary nails or pins}
- A61B 17/68: Internal fixation devices {, including fasteners and spinal fixators, even if a part thereof projects from the skin (bone staples A61B17/0642)}
- A61B 17/725: {with locking pins or screws of special form}
- A61B 17/8888: {at its central region}
- A61B 17/921: {for intramedullary devices}
- A61B 50/20: Holders specially adapted for surgical or diagnostic appliances or instruments (drapes with means to hold surgical instruments A61B46/23; for catheters A61M25/02)
- A61B 50/30: Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments (for wound clamps A61B17/10; for ligaturing clips A61B17/122; packages or dispensers for surgical gloves or finger-stalls A61B42/40)
- A61B 50/34: Baskets
- A61F 2/28: Bones
- A61B 17/8615: {at the central region of the screw head}
- A61B 17/863: {with thread interrupted or changing its form along shank, other than constant taper}
- A61B 17/8875: {Screwdrivers, spanners or wrenches}
- A61B 50/33: Trays
- A61B 2017/00411: {actuated by application of energy from an energy source outside the body}
- A61B 2017/00845: {of moving parts with respect to each other}
- A61B 2017/00876: {magnetic}
- A61B 2017/681: {Alignment, compression, or distraction mechanisms}
- A61B 2090/031: {torque limiting}
- A61B 2090/034: {abutting on parts of the device itself}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

A rotational correction system includes an implant having first and second sections, the implant having a rotatable permanent magnet disposed in a housing of the first section, the rotatable permanent magnet mechanically connected to a nut operatively coupled to the second section. A keyed portion is interposed between the nut and one or more non-linear grooves disposed on an inner surface of the housing. An external adjustment device having at least one rotatable magnet configured to rotate the rotatable permanent magnet of the implant is part of the system. Rotation of the rotatable permanent magnet of the implant in a first direction effectuates a clockwise change in the rotational orientation of the first section relative to the second section and rotation of the rotatable permanent magnet of the implant in a second direction effectuates a counter-clockwise change in the rotational orientation of the first section relative to the second section.

## Claims

### Claim 1

A rotational correction system comprising:
an implant comprising a first section and a second section, the implant having a rotatable permanent magnet disposed in a housing of the first section, the rotatable permanent magnet mechanically connected to a nut operatively coupled to the second section of the implant;
a keyed portion interposed between the nut and one or more non-linear grooves disposed on an inner surface of the housing; and
an external adjustment device comprising at least one rotatable magnet configured to rotate the rotatable permanent magnet of the implant, wherein rotation of the rotatable permanent magnet of the implant in a first direction effectuates a clockwise change in the rotational orientation of the first section relative to the second section and wherein rotation of the rotatable permanent magnet of the implant in a second direction effectuates a counter-clockwise change in the rotational orientation of the first section relative to the section.