Source: http://www.freshpatents.com/-dt20130124ptan20130023992.php
Timestamp: 2014-10-31 08:35:17
Document Index: 548287709

Matched Legal Cases: ['§120', '§120', '§120', '§120', '§120', '§119', 'Application No. 61', '§119', 'Application No. 61', 'Application No. 61', 'Application No. 61', '§119', 'Application No. 60', '§119', '§120']

Bi-directional Fixating/locking Transvertebral Body Screw/intervertebral Cage Stand-alone Constructs FreshPatents Stats1 views for this patent on FreshPatents.com2013: 1 viewsUpdated: October 26 2014 TOP 200 Companies filing patents this week
Bi-directional fixating/locking transvertebral body screw/intervertebral cage stand-alone constructs Bi-directional fixating/locking transvertebral body screw/intervertebral cage stand-alone constructsA bi-directional fixating transvertebral (BDFT) screw/cage apparatus includes an intervertebral cage having a plurality of internal angled screw guides and screw members and a screw locking mechanism. The screw locking mechanism has leaf springs mechanically interacting with ratcheted screw heads of the screws and allowing the ratchet teeth of the screw heads to rotate only in a penetrating direction and preventing rotation of the screw head in an opposite direction. The intervertebral cage is adapted for posterior lumbar intervertebral placement, anterior lumbar intervertebral placement, anterio-lateral thoracic intervertebral placement, or anterior cervical intervertebral placement.Related Terms: Anterior Cervical Lumbar Posterior Thoracic Vertebra Intervertebral Cage Vertebral Body USPTO Applicaton #: #20130023992 - Class: 623 1716 (USPTO) - 01/24/13 - Class 623 Prosthesis (i.e., Artificial Body Members), Parts Thereof, Or Aids And Accessories Therefor > Implantable Prosthesis >Bone >Spine Bone >Including Spinal Disc Spacer Between Adjacent Spine Bones Inventors: Nathan C. Moskowitz, Mosheh T. Moskowitz, Ahmnon D. Moskowitz, Pablo A. Valdivia Y. Alvarado The Patent Description & Claims data below is from USPTO Patent Application 20130023992, Bi-directional fixating/locking transvertebral body screw/intervertebral cage stand-alone constructs.
This application is a Continuation-In-Part Application, for which priority is claimed under 35 U.S.C. §120, of copending U.S. patent application Ser. No. 13/103,994, filed on May 9, 2011 (Attorney Docket No. 3003/0107PUS8), which is a Divisional of U.S. patent application Ser. No. 12/054,335, filed on Mar. 24, 2008 (now U.S. Pat. No. 7,972,363 B2, issued on Jul. 5, 2011) (Attorney Docket No. 3003/0107PUS1), which is a Continuation-In-Part of copending application Ser. No. 11/842,855, filed on Aug. 21, 2007 (now U.S. Pat. No. 7,942,903, issued May 17, 2011) (Attorney Docket No. 3003/0105PUS1), which is a Continuation-In-Part of application Ser. No. 11/536,815, filed on Sep. 29, 2006 (now U.S. Pat. No. 7,846,188 B2, issued Dec. 7, 2010) (Attorney Docket No. 3003/0104PUS2), which is a Continuation-In-Part of application Ser. No. 11/208,644, filed on Aug. 23, 2005 (now U.S. Pat. No. 7,704,279 issued on Apr. 27, 2010) (Attorney Docket No. 3003/0104PUS1), the entire contents of all of the above identified patent applications are hereby incorporated by reference in their entirety and for which priority of each of the above-identified applications is claimed under 35 U.S.C. §120.
This application also is a Continuation-In-Part Application, for which priority is claimed under 35 U.S.C. §120, of copending application Ser. No. 13/084,543, filed on Apr. 11, 2011 (Attorney Docket No. 3003/0105PUS2), which is a Divisional of copending application Ser. No. 11/842,855, filed on Aug. 21, 2007 (now U.S. Pat. No. 7,942,903, issued May 17, 2011) (Attorney Docket No. 3003/0105PUS1), which is a Continuation-In-Part of application Ser. No. 11/536,815, filed on Sep. 29, 2006 (now U.S. Pat. No. 7,846,188 B2, issued Dec. 7, 2010) (Attorney Docket No. 3003/0104PUS2), which is a Continuation-In-Part of application Ser. No. 11/208,644, filed on Aug. 23, 2005 (now U.S. Pat. No. 7,704,279 issued on Apr. 27, 2010) (Attorney Docket No. 3003/0104PUS1), the entire contents of all of the above identified patent applications are hereby incorporated by reference in their entirety and for which priority of each of the above-identified applications is claimed under 35 U.S.C. §120.
This application also is a Continuation-In-Part Application, for which priority is claimed under 35 U.S.C. §120, of copending application Ser. No. 13/401,829, filed on Feb. 21, 2012 (Attorney Docket No. 3003/0107PUS5), which claims priority under 35 U.S.C. §119(e) of U.S. Provisional Application No. 61/445,034, filed on Feb. 21, 2011 (Attorney Docket No. 3003/0107PR05), the entire contents of all of the above identified patent applications are hereby incorporated by reference in their entirety.
This application also claims priority under 35 U.S.C. §119(e) of U.S. Provisional Application No. 61/451,582, filed on Mar. 10, 2011 (Attorney Docket No. 3003/0107PR07), U.S. Provisional Application No. 61/451,579, filed on Mar. 10, 2011 (Attorney Docket No. 3003/0107PR06), and U.S. Provisional Application No. 61/445,034, filed on Feb. 21, 2011 (Attorney Docket No. 3003/0107PR05), the entire contents of all of the above identified patent applications are hereby incorporated by reference in their entirety.
U.S. patent application Ser. No. 13/084,543, filed on Apr. 11, 2011 (Attorney Docket No. 3003/0105PUS2), Ser. No. 11/842,855, filed on Aug. 21, 2007 (Attorney Docket No. 3003/0105PUS1), Ser. No. 11/536,815, filed on Sep. 29, 2006 (Attorney Docket No. 3003/0104PUS2), and Ser. No. 11/208,644, filed on Aug. 23, 2005 (Attorney Docket No. 3003/0104PUS1), each claim the benefit of priority under 35 U.S.C. §119(e) of U.S. Provisional Application No. 60/670,231, filed on Apr. 12, 2005 (Attorney Docket No. 3003/0102PR01), and this application hereby incorporates the claim of priority to this provisional application under 35 U.S.C. §119(e) from the aforementioned intermediate applications (for which priority of each intermediate application is claimed under 35 U.S.C. §120); and the entire contents of all of the above identified patent applications are hereby incorporated by reference in their entirety.
The history and evolution of instrumented spinal fusion in the entire human spine has been reviewed in related applications Ser. No. 12/054,335, filed on Mar. 24, 2008, Ser. No. 13/084,543, filed on Apr. 11, 2011, Ser. No. 11/842,855, filed on Aug. 21, 2007, Ser. No. 11/536,815, filed on Sep. 29, 2006, and Ser. No. 11/208,644, filed on Aug. 23, 2005, the contents of which are hereby incorporated by reference in their entirety. Conventionally, the majority of posterior cervical and almost all posterior thoracic and lumbosacral fusion surgical techniques are typically supplemented with pedicle screw placement. Conventionally, the majority of anterior cervical spinal fusions, and many anterio-lateral thoracic, and anterior or anterio-lateral lumbosacral fusions are supplemented with anterior or anterior-lateral spinal plating, and very often, in particular in the thoracic and lumbosacral spine, are supplemented with posterior pedicle screw instrumentation.
Herein described are multiple exemplary embodiments of a device which combines in a single stand-alone construct the dual functions of: a) an intervertebral cage spacer which can be filled with bone fusion material maintaining disc height, and, b) a bi-directional fixating/fusion transvertebral body screw apparatus. These embodiments are described for posterior and anterior lumbar (and anterio-lateral thoracic) intervertebral placement, and anterior cervical intervertebral placement. The present invention recognizes the aforementioned problems with prior art apparatus and solves these problems by, among other things, improving upon the designs illustrated in the aforementioned related applications. The present application provides an advanced and novel bi-directional fixating transvertebral (BDFT) screw/cage apparatus with a modified novel cage which has indentations on the upper aspect of the screw box adjacent to the internalized angled screw guides. These indentations have leaf springs which are press fit into these indentations. The leaf springs function as screw locking mechanisms in conjunction with specialized BDFT screws that are designed with ratcheted screw heads. The small leaf springs which are perpendicularly aligned with the screw head ratchet spiked teeth and troughs allow the ratchet teeth of the screw heads to rotate only in the penetrating direction. Due to the geometric orientation of the ratchet teeth and troughs vis-à-vis the spring leaf, rotation of the screw head in the opposite direction is prevented. The spring leaf engages the space between the ratchet teeth (troughs) upon its final allowed turn, and prevents any rotation in the opposite direction thereby locking the screw into its final position. The interaction between the adjacent leaf springs and the screws ratcheted teeth and troughs which only allow screw rotation in the penetrating direction is the mechanical basis for this novel locking mechanism. This mechanism can be used not only for these constructs but also with any other device which requires a locking screw. All these novel modifications improve the probability of a solid fusion with this new invention.
For example, an exemplary embodiment is directed to an intervertebral cage spacer and bi-directional fixating/fusion transvertebral body screw/cage apparatus. The apparatus includes an intervertebral cage for maintaining disc height. The intervertebral cage includes a first internal screw guide and a second internal screw guide adjacent to novel cage indentations which contains a press-fit leaf spring. The apparatus further includes a first screw member having a screw head with ratchet teeth, a tapered end and a threaded body disposed within the intervertebral cage, a second screw member having a screw head with ratchet teeth, a tapered end and a threaded body disposed within the intervertebral cage, and a first screw locking mechanism that prevents the first screw member and the second screw from pulling-out of the first internal screw guide and the second internal screw guide.
Another exemplary embodiment is directed to an integral intervertebral cage spacer and bi-directional fixating/fusion transvertebral body screw apparatus, including an intervertebral cage having a plurality of internal angled screw guides. The apparatus further includes a plurality of screw members having a screw head with ratchet teeth and troughs, a tapered end and a threaded body disposed within the plurality of internal angled screw guides of the intervertebral cage, which are adjacent to novel cage indentations which contain press fit leaf springs. Due to the geometric orientation of the ratchet teeth on the screw head, the adjacent leaf springs allow the screws to rotate only in the penetrating direction. Screw rotation in the opposite, back out, direction is prevented because the leaf spring engages the space in between the ratchet teeth (troughs) preventing this opposite rotation and hence locking it preventing the plurality of screw members from pulling out of the plurality of internal angled screw guides.
Another exemplary embodiment is directed to a method of inserting a bi-directional fixating transvertebral (BDFT) screw/cage apparatus between a first vertebral body and a second vertebral body. The method includes measuring a dimension of a disc space between the first vertebral body and the second vertebral body, determining that the disc space is a posterior or lateral lumbar disc space, an anterior lumbar disc space, or an anterior cervical disc space, selecting an intervertebral cage based on the measured dimension of the disc space and based on the determination of the disc space being the posterior lumbar disc space, the lateral lumbar disc space, the anterior lumbar disc space, or the anterior cervical disc space, inserting the selected intervertebral cage into a midline of the disc space until the selected intervertebral cage is flush or countersunk relative to the first vertebral body and the second vertebral body, inserting a first screw member into a first internal screw guide of the selected intervertebral cage, inserting a second screw member into a second internal screw guide of the selected intervertebral cage, screwing the first screw member and the second screw member into the first vertebral body and the second vertebral body respectively, confirming a position and placement of the intervertebral cage relative to the first vertebral body and the second vertebral body, and locking the first screw member and the second screw member in a final position by its final turn when it\'s flush with the surface of the cage. The leaf spring prevents screw back out or pull out by engaging and locking the space between the ratchet teeth (troughs) of the screw head when the screws are in their final resting positions.
The posterior lumbar BDFT cage screw apparatus is uniquely designed in order to get into the posterior space and obtain proper screw angulations. Two exemplary embodiments are described; one that is rectangular and one that is elliptical and concave mimicking the posterior intervertebral disc space. In both exemplary embodiments, the axes of the internal screw guides are not horizontally aligned as they are in the cervical embodiment. Their axes must be oblique one to the other, and the screw guides must be very close to one another, in order for the screws to achieve proper vertebral body penetration in such a restricted posterior lumbar inter space.
In all BDFT embodiments, the screw angle guides have an approximate twenty five degree angle. The angles can be variable or divergent.
In all embodiments the screw drill guide narrows such that the screw head is countersunk into the cage and thus it can be locked even in the absence of an additional screw locking mechanism. The screw locking mechanism described herein is yet an additional mechanism preventing screw back out.
FIG. 1A illustrates a top view of an anterior cervical intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 1B illustrates a bottom perspective (isometric) view of an anterior cervical intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 1C illustrates a side view of an anterior cervical intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 1D illustrates a bottom, perspective view of an anterior cervical intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 1E illustrates a front, perspective, exploded view of an anterior cervical intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 1F illustrates a top, perspective exploded view of an anterior cervical intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 1G illustrates a top, perspective exploded view of an anterior cervical intervertebral cage/BDFT screw construct with visualized internalized angled screw guides according to an embodiment of the invention.
FIG. 2A illustrates a top view of an anterior lumbar intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 2B illustrates a bottom view of an anterior lumbar intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 2C illustrates a top, perspective view of an anterior lumbar intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 2D illustrates a side, perspective view of an anterior lumbar intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 2E illustrates a top, perspective view of an anterior lumbar intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 2F illustrates a top exploded view of an anterior lumbar intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 2G illustrates a top, perspective exploded view of an anterior lumbar intervertebral cage/BDFT screw construct according to an embodiment of the invention.
FIG. 3A illustrates a top view of a posterior lumbar rectangularly designed intervertebral cage/BDFT construct according to an embodiment of the invention.
FIG. 3B illustrates a front, perspective view of a posterior lumbar rectangularly designed intervertebral cage/BDFT construct according to an embodiment of the invention.
FIG. 3C illustrates a side, perspective view of a posterior lumbar rectangularly designed intervertebral cage/BDFT construct according to an embodiment of the invention.
FIG. 3D illustrates a front, perspective view of a posterior lumbar rectangularly designed intervertebral cage/BDFT construct according to an embodiment of the invention.
FIG. 3E illustrates a top, perspective exploded view of a posterior lumbar rectangularly designed intervertebral cage/BDFT construct according to an embodiment of the invention.
FIG. 3F illustrates a top, perspective exploded view of a posterior lumbar rectangularly designed intervertebral cage/BDFT construct according to an embodiment of the invention.
FIG. 4A illustrates a top view of a posterior lumbar elliptically designed intervertebral cage/BDFT construct according to an embodiment of the invention.
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Patent InfoApplication # US 20130023992 A1Publish Date 01/24/2013 Document # 13418323 File Date 03/12/2012 USPTO Class 623 1716 Other USPTO Classes International Class 61F2/44 Drawings 26 AnteriorCervicalLumbarPosteriorThoracicVertebraIntervertebral CageVertebral Body