US 9,770,274 B2Granted

Intramedullary implants for replacing lost bone

AssigneeNuVasive Specialized Orthopedics, Inc.

InventorsScott Pool, Blair Walker

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Abstract

A bone transport system includes a nail having a proximal end and a distal end, the proximal end configured for securing to a first portion of bone, the distal end configured for securing to a second portion of bone. The system includes a housing having a wall with a longitudinal opening extending a length along a portion thereof. The system further includes a transport sled having a length that is shorter than the length of the longitudinal opening, the transport sled configured for securing to a third portion of bone, the transport sled further configured to be moveable along the longitudinal opening. The system further includes a magnetic assembly disposed within the nail and configured to be non-invasively actuated by a moving magnetic field, wherein actuation of the magnetic assembly moves the transport sled along the longitudinal opening. The system further includes a ribbon extending on opposing sides of the transport sled and substantially covering the longitudinal opening.

Claims1

Dependent claims

An implantable dynamic apparatus comprising:

a nail having a first portion and a second portion, the first portion of the nail configured for securing to a first portion of bone, the second portion of the nail configured for securing to a second portion of bone;
the second portion of the nail configured to be longitudinally moveable with respect to the first portion of the nail, wherein the second portion of the nail includes an internally threaded feature;
a magnetic assembly configured to be non-invasively actuated by a moving magnetic field;
a lead screw having an externally threaded portion, the lead screw coupled to the magnetic assembly, wherein the externally threaded portion of the lead screw engages the internally threaded feature of the second portion of the nail;
wherein actuation of the magnetic assembly turns the lead screw, which in turn changes the longitudinal displacement between the first portion of the nail and the second portion of the nail;
a first abutment surface coupled to the lead screw;
a second abutment surface coupled to the second portion of the nail;
and
wherein the turning of the lead screw in a first direction causes the first abutment surface to contact the second abutment surface, stopping the motion of the lead screw with respect to the second portion of the nail, and wherein subsequent turning of the nail in a second direction is not impeded by any jamming between the internally threaded feature and the externally threaded portion.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/212,090Filed 15 Jul 2016 · continuation
Priority: 18 Oct 2012
Published: US 2017/0035470 A19 Feb 2017
Granted: 26 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61B 17/7216
Intramedullary devices, e.g. pins or nails: for bone lengthening or compression
A61B 17/84
Internal fixation devices , including fasteners and spinal fixators, even if a part thereof projects from the skin: fasteners therefor or…
A61B 17/846
Fasteners therefor or fasteners being internal fixation devices: nails or pins, i.e. anchors without movable parts, holding by friction only, with…
A61B 17/86
Fasteners therefor or fasteners being internal fixation devices: pins or screws or threaded wires; nuts therefor

Family

Application13/655,246Parent of this continuation · filed 18 Oct 2012
Application14/451,190Parent of this continuation · filed 4 Aug 2014
US 9,044,281 B2Parent of this continuation · filed 2 Jun 2015
US 2017/0035470 A1Pre-grant publication · published 9 Feb 2017
US 9,421,046 B2Parent of this continuation
US 2014/0114311 A1Published application
US 2015/0032109 A1Published application
US 9,770,274 B2This patent

From the US filing history. Foreign family members aren’t listed.