The present invention relates generally to spinal implants and prostheses, and particularly to a spinal pedicle screws based system designed to be expandable and maintain polyaxial motion in situ.
Spine scoliosis is affecting significant portion of the population. Current surgical treatment involves many times the use of an intervertebral pedicle screws based systems designed to be placed between two or more vertebrae.
The use of standard pedicle screws system is typically associated with spinal fusion, which has some known negative impacts. It is of value therefor to have a non-fusion system that can prevent or correct scoliosis of some patients.
The present invention seeks to provide an improved spinal pedicle screws based system that can be expanded after the screws are inserted to the pedicles of the two vertebrae and maintain spinal motion via one or more polyaxial joints.
There is thus provided in accordance with a non-limiting embodiment of the present invention a spinal system including a first distraction rod which has a first connector mounted at an end thereof, and a second distraction rod which has a second connector mounted at an end thereof, both of the rods being arranged to move in a housing, and wherein each of the connectors is mounted on a polyaxial joint and secured by a fastener, each of the polyaxial joints being attached to, or part of, a pedicle screw, and wherein the fastener is tightened against a portion of the polyaxial joint but does not inhibit polyaxial movement of the polyaxial joint, such that even after tightening the fastener, the connectors cannot move off the polyaxial joints but the polyaxial joints are free to move polyaxially at all times.
In accordance with an embodiment of the present invention at least one of the first and second distraction rods is affixed by a distraction fastener at any desired location along the housing.
In accordance with an embodiment of the present invention at least one of the first and second distraction rods is rotated about its longitudinal axis before being locked in place by the distraction fastener.
In accordance with an embodiment of the present invention at least one of the distraction rods is at least partially threaded and mates with an internal thread in the housing.
In accordance with an embodiment of the present invention both of the distraction rods are at least partially threaded and mate with an internal thread in the housing, and wherein threads of one of the distraction rods are right-handed and threads of the other distraction rod are left-handed.
In accordance with an embodiment of the present invention the housing includes a fluid inlet for introducing therethrough fluid.
In accordance with an embodiment of the present invention the housing includes a biasing device operative to apply a biasing force on at least one of the first and second distraction rods.
The present invention will be understood and appreciated more fully from the following detailed description taken in conjunction with the drawings in which:
Reference is now made to
The spinal system 10 includes a first distraction rod 12 which has a first connector 14 mounted at an end thereof, and a second distraction rod 16 which has a second connector 18 mounted at an end thereof. Both rods 12 and 16 are arranged to move (e.g., translate or slide) in a housing 20. Both connectors 14 and 18 may each include a ring mounted on a polyaxial joint 22 (which may be, without limitation, a spherically shaped head) and secured by a fastener 24, such as a nut. The polyaxial joint 22 may be attached to, or may be part of, a pedicle screw 26. The fastener 24 is tightened against a portion (in the illustration, the upper portion) of the polyaxial joint 22 but does not inhibit polyaxial movement of the polyaxial joint. Thus, even after tightening the fastener 24, the connector 14 or 18 cannot move off the polyaxial joint but the polyaxial joint is free to move polyaxially at all times.
Distraction fasteners 28 and 30 may fasten the first and second distraction rods 12 and 16, respectively, at any desired location along housing 20.
After inserting the pedicle screws 26 into the patient's vertebrae it is possible to distract or expand (the terms being used interchangeably) the distance between the screws by using a distractor (not shown) or any other suitable means. The distracted orientation is shown in
As seen in
Reference is now made to
Reference is now made to
In the version of
The extender member 70 may be secured to spinal structure with one or two pedicle screws 76. The extender member 70 may be collinear with rod 44 or may be tilted with respect to rod 44.
Reference is now made to
In one embodiment, one of the rods can be affixed to the housing while the other rod is distracted by the fluid (hydraulic or pneumatic) force.
Reference is now made to
In one embodiment, one of the rods can be affixed to the housing while the other rod is distracted by the spring force.
Number | Name | Date | Kind |
---|---|---|---|
5413602 | Metz-Stavenhagen | May 1995 | A |
5468241 | Metz-Stavenhagen et al. | Nov 1995 | A |
5540688 | Navas | Jul 1996 | A |
6241730 | Alby | Jun 2001 | B1 |
6264658 | Lee et al. | Jul 2001 | B1 |
7029475 | Panjabi | Apr 2006 | B2 |
7611526 | Carl et al. | Nov 2009 | B2 |
7935134 | Reglos | May 2011 | B2 |
8025681 | Colleran | Sep 2011 | B2 |
8475498 | Jackson | Jul 2013 | B2 |
8475499 | Cournoyer | Jul 2013 | B2 |
8777995 | McClintock | Jul 2014 | B2 |
8828058 | Elsebaie | Sep 2014 | B2 |
8926669 | Jacofsky et al. | Jan 2015 | B2 |
8992576 | Keyer et al. | Mar 2015 | B2 |
9023087 | Frankel et al. | May 2015 | B2 |
9517089 | NuVasive | Dec 2016 | B1 |
20030009226 | Graf | Jan 2003 | A1 |
20030055427 | Graf | Mar 2003 | A1 |
20050182401 | Timm | Aug 2005 | A1 |
20050228382 | Richelsoph et al. | Oct 2005 | A1 |
20080195100 | Capote et al. | Aug 2008 | A1 |
20080234743 | Marik | Sep 2008 | A1 |
20090093820 | Trieu | Apr 2009 | A1 |
20090306717 | Kercher | Dec 2009 | A1 |
20100249836 | Seme | Sep 2010 | A1 |
20110307015 | Zucherman | Dec 2011 | A1 |
20120130430 | Le Roux | May 2012 | A1 |
20130018421 | George | Jan 2013 | A1 |
20140296918 | Fening | Oct 2014 | A1 |
20150335358 | Luhmann | Nov 2015 | A1 |
20160106471 | Lynch | Apr 2016 | A1 |
20180125533 | Arnin | May 2018 | A1 |
20190059950 | Di Lauro et al. | Feb 2019 | A1 |
Number | Date | Country |
---|---|---|
H78504 | Jan 1995 | JP |
200033091 | Feb 2000 | JP |
2003518978 | Jun 2003 | JP |
2008504070 | Feb 2008 | JP |
5305101 | Jan 2011 | JP |
2004075778 | Sep 2004 | WO |
2006002333 | Jan 2006 | WO |
Entry |
---|
PCT Search Report PCT/IB2016/052075, dated Sep. 7, 2016. |
JP 2017553116, Notice of Reasons for Refusal, 5 pages, Apr. 5, 2021. |
PCT/IB2020/000423, International Search Report and Written Opinion, 9 pages, dated Oct. 19, 2020. |
USPTO, Ex. Lee Young, Search Report and Written Opinion, 8 pgs. Oct. 19, 2020. |
U.S. Appl. No. 15/564,199, Nonfinal Office Action, 6 pgs, dated Jun. 1, 2018. |
U.S. Appl. No. 15/564,199, Applicant Response, 5 pages, dated Sep. 3, 2018. |
U.S. Appl. No. 15/564,199, Final Rejection, 6 pgs, dated Jan. 8, 2019. |
PCT/IB2016/052075, ISA/EPO, International Search Report and Written Opinion, 8 pgs, dated Jul. 9, 2016. |
BR112017022208-6, Preliminary Office Action, 5 pgs, dated May 19, 2020. |
BR112017022208-6, Response Filed, 8 pgs, dated Aug. 17, 2020. |
CN 201680022348.80, Notification of the Second Office action, 9 pgs, dated Apr. 15, 2020. |
CN 201680022348.80, Response to Second Office Action, 16 pgs. dated Aug. 28, 2020. |
CN 201680022348.80, Third Office Action, 8 pgs. dated Dec. 14, 2020. |
CN 201680022348.80, Response to Third Office Action, 5 pgs, dated Feb. 25, 2021. |
JP 2017553116, Notice of Reasons for Refusal, 4 pgs, dated May 11, 2020. |
JP 2017553116, Response filed, 7 pgs (Englsh translation of claims only) dated Nov. 17, 2020. |
PCT/IB2020/000423, ISA/US, Search Report and Written Opinion, 7 pgs, dated Oct. 19, 2020. |
Number | Date | Country | |
---|---|---|---|
20190282277 A1 | Sep 2019 | US | |
20200375629 A9 | Dec 2020 | US |
Number | Date | Country | |
---|---|---|---|
62178691 | Apr 2015 | US |
Number | Date | Country | |
---|---|---|---|
Parent | 15564199 | US | |
Child | 16429198 | US |