Source: http://www.google.com/patents/US7785354?dq=6317900
Timestamp: 2017-06-26 02:14:17
Document Index: 702887051

Matched Legal Cases: ['art 5', 'art 5', 'art 5', 'Application No. 02', 'Application No. 02', 'Application No. 02', 'Application No. 02', 'Application No. 2001', '§ 112', '§ 102', '§ 102', '§ 112']

Patent US7785354 - Bone screw - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a...http://www.google.com/patents/US7785354?utm_source=gb-gplus-sharePatent US7785354 - Bone screwAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7785354 B2Publication typeGrantApplication numberUS 11/291,920Publication dateAug 31, 2010Filing dateDec 2, 2005Priority dateNov 10, 2000Fee statusPaidAlso published asDE10055888C1, DE50102723D1, EP1205153A2, EP1205153A3, EP1205153B1, US6736820, US8409260, US8864803, US8945194, US9498256, US9566093, US20020058942, US20040153077, US20060084995, US20060106383, US20110066189, US20110125195, US20120041495, US20120101532, US20150094776, US20150196329Publication number11291920, 291920, US 7785354 B2, US 7785354B2, US-B2-7785354, US7785354 B2, US7785354B2InventorsLutz Biedermann, Jürgen HarmsOriginal AssigneeBiedermann Motech GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (104), Non-Patent Citations (23), Referenced by (64), Classifications (14), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetBone screw
US 7785354 B2Abstract
A bone screw having a screw member possessing a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw is provided. The receiving part has on open first bore and a substantially U-shaped cross-section having two free legs provided with a thread. Furthermore, the receiving part has a second bore on the end opposite to the first bore whose diameter is greater than that of the threaded section and smaller than that of the head. On the bottom of the first bore a seat for the head is provided. In order that the screw member can be pivoted to at least one side by an enlarged angle, the edge bounding the free end of the second bore viewed relative to the axis of the first bore is of asymmetric construction.
1. A method of stabilizing bone comprising:
providing a coupling element having first and second bore sections that are angled relative to one another, said coupling element having rod-receiving openings for receiving an elongated member;
moving said coupling element relative to said anchoring element to align said rod-receiving openings with said elongated member;
securing said elongated member in said rod-receiving openings; and
2. The method of claim 1, wherein said coupling element has a first bore extending through said first bore section and a second bore extending through said second bore section.
3. The method of claim 1, wherein said rod-receiving openings extend through said first bore section of said coupling element in a direction transverse to said first bore.
4. The method of claim 1, wherein said first and second bores intersect one another between said upper and lower ends of said coupling element.
5. The method of claim 1, wherein said elongated member is an orthopedic rod.
6. A method of stabilizing a spine, comprising:
providing a coupling element having a first bore coaxial with a first longitudinal axis and extending through a first bore section of said coupling element and a second bore coaxial with a second longitudinal axis and extending through a second bore section of said coupling element, wherein said first and second longitudinal axes are transverse to one another;
assembling said coupling element with an anchoring element; and
after the assembling step, securing said anchoring element in bone.
7. The method of claim 6, wherein said coupling element has rod receiving openings for securing an orthopedic rod, the method further comprising:
moving said coupling element relative to said anchoring element to align said rod-receiving openings with said orthopedic rod;
securing said orthopedic rod in said rod-receiving openings; and
8. The method as claimed in claim 6, wherein said coupling element has an upper end and a lower end, said first bore extending from said upper end toward said lower end and said second bore extending from said lower end toward said upper end.
9. The method as claimed in claim 8, wherein said first and second bores are in communication with one another between said upper and lower ends of said coupling element.
10. The method as claimed in claim 6, wherein said upper end of said coupling element defines a first plane and said lower end of said coupling element defines a second plane, and wherein said first and second planes intersect one another.
11. The method as claimed in claim 6, wherein said anchoring element is a separate member assembled with said coupling element so that said coupling element and said anchoring element are movable relative to one another.
12. The method as claimed in claim 6, wherein said anchoring element has a head having a substantially spherical underside, and wherein said coupling element has a seat at the lower end thereof
13. The method as claimed in claim 12, wherein said seat is shaped for facilitating pivotal movement of said coupling element and said anchoring element relative to one another.
14. The method as claimed in claim 13, wherein said seat has a substantially concave surface adapted to engage the spherical underside of said head.
15. A method of stabilizing a spine comprising:
providing a coupling element having an uppermost end defining a first plane, a lowermost end defining a second plane, and at least one bore extending from said uppermost end toward said lowermost end, wherein said first and second planes intersect one another;
16. The method as claimed in claim 15, wherein said coupling element has rod receiving openings for securing an orthopedic rod, the method further comprising:
17. The method as claimed in claim 15, wherein said at least one bore is adapted for receiving said anchoring element.
18. The method as claimed in claim 15, wherein said rod receiving openings are defined by substantially U-shaped opening surfaces.
19. A method of stabilizing a spine, comprising:
providing a coupling element having a first bore coaxial with a first longitudinal axis and a second bore coaxial with a second longitudinal axis, wherein said first and second longitudinal axes are transverse to one another and wherein said first and second bores are within an integral portion of said coupling element;
assembling said coupling element with an anchoring element having a head wherein a seat of said coupling element is adapted to contact an underside of said head, and wherein at least a portion of said anchoring element is capable of passing though both first and second bores; and
20. The method of claim 19, wherein said coupling element has rod receiving openings for securing an orthopedic rod, the method further comprising:
21. The method as claimed in claim 19, wherein said coupling element has an upper end and a lower end, said first bore extending from said upper end toward said lower end and said second bore extending from said lower end toward said upper end.
22. The method as claimed in claim 19, wherein said upper end of said coupling element defines a first plane and said lower end of said coupling element defines a second plane, and wherein said first and second planes intersect one another.
23. The method as claimed in claim 19, wherein said anchoring element has a head having a substantially spherical underside, and wherein said seat of said coupling element is located at the lower end thereof.
24. The method as claimed in claim 23, wherein said seat is shaped for facilitating pivotal movement of said coupling element and said anchoring element relative to one another. Description
This application is a division of Ser. No. 10/763,431, filed Jan. 22, 2004, which is a continuation of Ser. No. 10/037,698, filed Nov. 9, 2001, now U.S. Pat. No. 6,736,820, the disclosure of which is incorporated herein by reference.
The invention relates to a bone screw having a threaded section and a head and a receiving part at the head end for receiving a rod to be connected to the bone screw, the receiving part possessing an open first bore and a substantially U-shaped cross-section having two free legs provided with a thread and a second bOre at the end opposite to the first bore, whose diameter is greater than that of the threaded section and smaller than that of the head and which forms the seat for the head, and a nut or screw working together with the thread.
Such a bone screw is disclosed, for example, in U.S. Pat. No. 5,672,176. In the known bone screw the head is of spherical segment-shaped construction. The bottom of the first bore adjacent to the second bore is likewise of spherical segment-shaped construction so that the spherical head lies on this spherical section. The plane going through the bounding edge is oriented at right angles to the axis of the first bore and the mid-point of the second bore coincides with the axis of the first bore. By this means it is achieved that the threaded section possessing the head is pivotable in a predetermined angle of generally up to 25° about the axis of the first bore so that even after screwing the threaded section into a vertebral segment orientation of the receiving part receiving a rod is possible. At the same time, the size of the pivot angle is limited to the extent that the second bore as a function of the diameter of the head must not exceed d certain size so that the head still has an adequate hold in the receiving part.
The aim of the invention is to provide a bone screw which permits a larger pivot angle. This task is solved by a bone screw having a screw member that possess a threaded section, a head and a receiving part at the head end for receiving a rod to be connected to the bone screw. The receiving part has an open first bore and a substantially U-shaped cross-section having two free legs provided with threads, a second bore at the end opposite the first bore having a diameter greater than the diameter of the threaded section and smaller than the diameter of the head, and a seat for the head and a nut or screw acting together with the thread. When viewed relative to the axis of the first bore, the edge bounding the free end of the second bore is asymmetrical.
Refinements of the invention are identified in the more detailed embodiments described below.
FIG. 1 depicts a side elevation of a first embodiment of the invention, partly in sectional representation.
FIG. 3 depicts a side elevation, partly in sectional representation, of a second embodiment of the invention.
FIG. 4 depicts a corresponding representation of a further embodiment of the invention.
The bone screw includes a screw member proper 1 having a threaded section 2 and a head 3. The head is formed in the shape of a segment of a sphere in the region adjoining the threaded section. Coaxial with the thread axis and on the end opposite to the threaded section 2 the head possesses a recess 4 for engagement with a socket screw key.
The bone screw further comprises a cylindrically constructed receiving part 5. At one end this has a first bore 6 of axially symmetrical construction. On the opposite end a second bore 7 is provided whose diameter is greater than that of the threaded section 2 and smaller than that of the head 3. On the end opposite to the second bore the first bore is open and its diameter is of such a size that that the screw member 1 can be guided through the open end by its threaded section 2 going through this bore and by the head going as far as the bottom of the first bore. The bottom of the first bore is constructed as a spherically shaped region towards the open end, the radius being substantially equal to the radius of the spherical segment-shaped section of the head 3. Furthermore, the receiving part 5 has a U-shaped recess 8 arranged symmetrically relative to the center of the part whose bottom is directed towards the second bore 7 and whose two side legs 13, 14 extend to the open end directed towards the first bore 6. At the free end of the legs 13, 14 a thread for engagement with a screw member constructed as a nut or screw is provided. The nut or screw serves to fix a rod to be inserted into the U-shaped recess 8, it being possible for the nut or screw to act on the rod directly or via a pressure member.
In the embodiment shown in FIGS. 1 and 2, in the direction of the arrow 9, whose direction lies in a plane going through the axis of symmetry of the first bore and which is inclined to the axis of symmetry by a predetermined angle, a circular countersink 10 is made in the edge between the opening plane 11 of the second bore and the edge 12—of the first bore.
In the second embodiment shown in FIG. 3 the interior of the receiving part 5 is constructed as in the first embodiment. The opening plane 11, which bounds the second bore 7, in this embodiment is inclined at a predetermined angle α to the plane bounded by the second bore 7 so that the normal to this plane 11 and the axis of symmetry of the first bore 15 enclose the angle of inclination. In the case shown this angle α is 15° as an exemplified embodiment. In this version it is also achieved that the screw member 1 is pivotable in the direction shown by an angle to the axis of symmetry of the-first-bore which is substantially greater than the angle which is achievable in the usual mode of construction.
In a fourth embodiment which is not shown the mid-point of the second bore is constructed offset to the side to a small extent, for example by 0.5 mm, relative to the axis of symmetry of the first bore. This lateral offsetting in turn produces the result that the head is held in the mounting formed by the spherically constructed bottom but a greater pivot width is achieved in a side direction.
In the exemplified embodiments described above four different approaches to a solution are presented. It is also possible to combine the individual approaches with one another; that is, for example, to combine the solution according to the first and second exemplified embodiments or one of the two with the third and/or fourth exemplified embodiment, or even all four exemplified embodiments in order to achieve, in this way, a still greater possibility for pivoting in at least one direction.
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JacksonSpinal fixation tool set and methodUS9655655Aug 15, 2012May 23, 2017Aesculap Implant Systems, LlcTwo step locking screw assemblyUS9668776Oct 5, 2015Jun 6, 2017Spinecraft, LLCSystems, assemblies and methods for spinal derotationUS20040153077 *Jan 22, 2004Aug 5, 2004Lutz BiedermannBone screwUS20090163962 *Dec 20, 2007Jun 25, 2009Aesculap Implant Systems, Inc.Locking device introducer instrumentUS20110066189 *Jan 22, 2004Mar 17, 2011Biedermann Motech GmbhBone screw* Cited by examinerClassifications U.S. Classification606/279, 606/278, 606/266International ClassificationA61B17/70, F16B35/00, A61F2/30, F16B35/06Cooperative ClassificationA61B17/8605, A61B17/7037, A61B17/7067, A61B17/7038, A61B17/7032European ClassificationA61B17/70B5D, A61B17/70B5BLegal EventsDateCodeEventDescriptionJun 5, 2012ASAssignmentOwner name: BIEDERMANN MOTECH GMBH & CO. KG, GERMANYFree format text: CHANGE OF LEGAL FORM;ASSIGNOR:BIEDERMANN MOTECH GMBH;REEL/FRAME:028324/0542Effective date: 20090720Owner name: BIEDERMANN TECHNOLOGIES GMBH & CO. KG, GERMANYFree format text: CONFIRMATORY PATENT ASSIGNMENT;ASSIGNOR:BIEDERMANN MOTECH GMBH & CO. KG;REEL/FRAME:028324/0571Effective date: 20120604Feb 24, 2014FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services