US6290703B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for fixing the sacral bone to adjacent vertebrae during osteosynthesis of the backbone
Assignee: Stryker European Operations Holdings LLC
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Filing: 2000-01-12
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Granted: 2001-09-18
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Expires: 2020-01-12
Abstract
Abstract A bone fixing device, in particular for fixing to the sacrum for osteosynthesis of the backbone. An elongate link receives at least one bone-fastening screw, which passes through an orifice formed in the link. In the bottom of the link there is a bearing surface of essentially circular cross-section. The head of the screw includes an essentially spherical surface for bearing against the bearing surface. The link includes a first thread in the vicinity of the orifice. The device further includes a plug having a second thread suitable for co-operating with the first thread. The plus is suitable for coming into clamping contact against said screw head to hold it in a desired angular position. The link is constituted by a single-piece plate-shaped element having the orifice and the first thread formed therein, with the bearing surface being essentially spherical.
Inventors
- 👤 Franck Ganem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:23
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7059; A61B17/7055; A61B17/80; A61B17/8033; A61B17/8042; A61B17/8047; A61B2017/00831; A61B2017/00858
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
165 words
A device for fixing the sacral bone to vertebrae adjacent to the sacral bone during posterior osteosynthesis of the backbone, the bone fixing device comprising: a plurality of bone fastening screws, each bone fastening screw having a head; a first elongated member and a second elongated member, each elongated member extending substantially parallel to the other elongated member and each elongated member having a first end portion, a second end portion and a third intermediate portion coupled between the first and second portions, each portion being in general alignment relative to one another, each elongated member further having means for receiving at least a first bone fastening screw at an angle in the first portion, means for receiving at least a second bone fastening screw in the second portion, and means for securing each bone fastening screw to the associated elongated member at the angle, wherein the third intermediate portion of each elongated member is rod-shaped and cooperates with a rod-type securing device for osteosynthesis.
Claim 2
Independent Claim
165 words
A device for fixing the sacral bone to vertebrae adjacent to the sacral bone during posterior osteosynthesis of the backbone, the bone fixing device comprising: a plurality of bone fastening screws, each bone fastening screw having a head; a first elongated member and a second elongated member, each elongated member extending substantially parallel to the other elongated member and each elongated member having a first end portion, a second end portion and a third intermediate portion coupled between the first and second portions, each portion being in general alignment relative to one another, each elongated member further having means for receiving at least a first bone fastening screw at an angle in the first portion, means for receiving at least a second bone fastening screw in the second portion, and means for securing each bone fastening screw to the associated elongated member at the angle, wherein the third intermediate portion of each elongated member is rod-shaped and cooperates with a rod-type securing device for osteosynthesis.
Claim 3
Dependent Claim
20 words
The bone fixing device of claim 1 , wherein the third intermediate portion has the shape of a cylindrical rod.
Claim 4
Dependent Claim
56 words
The bone fixing device of claim 2 , further comprising: at least one intermediate bone fixing member having a bone anchoring portion and having a receiving chamber for the rod-shaped intermediate portion of at least one of the first elongated member and second elongated member; and means for locking the rod-shaped intermediate portion in the chamber.
Claim 5
Dependent Claim
29 words
The bone fixing device of claim 2 , further comprising: means for traverse linking of the rod-shaped intermediate portions of the first intermediate portion to the second intermediate portion.
Claim 6
Dependent Claim
69 words
The bone fixing device of claim 1 , wherein at least one of the plurality of bone fastening screws is a top-loading screw, wherein the third intermediate portion is a cylindrical rod having a cylindrical circumference, the cylindrical rod being in general alignment relative to the first end portion and the second end portion, and wherein the top-loading screw is fixed about the cylindrical circumference of the cylindrical rod.
Claim 7
Dependent Claim
120 words
The bone fixing device of claim 5 , the head of each screw having a bottom portion, the bottom portion having a spherical profile, each means for receiving including an orifice through which a bone fastening screw may pass, the orifice further defined by a bottom region and a top region, the bottom region having a spherical profile complementary to the spherical profile of the screw head so as to act as a bearing surface, the top region having first threads, the means for securing including a plug, the plug having second threads adapted to cooperate with the first threads of the top region of the orifice to clamp a bone fastening screw to the elongated member at an angle.
Claim 8
Dependent Claim
54 words
The bone fixing device of claim 6 , the head of each screw having a top potion, the top portion having a spherical profile that extends from the bottom portion of the head, the plug further having a concave spherical profile complementary to the spherical profile of the top portion of the screw head.
Claim 9
Dependent Claim
48 words
The bone fixing device of claim 6 , wherein each orifice of the first portion is connected by a single longitudinal slot that permits the movement of one bone fastening screw from one bearing surface to another bearing surface without extracting the bone fastening screw from the orifice.
Claim 10
Dependent Claim
36 words
The bone fixing device of claim 5 , further comprising: at least one transition region, wherein each of the bearing surfaces and its associated first threads are mutually truncated at one of the transition regions therebetween.
Claim 11
Dependent Claim
56 words
The device of claim 5 , the elongated through orifice having an end and a major axis having a direction, the integral link member further having a linking portion, the linking portion adapted to extend from one end of the elongated through orifice in a direction corresponding to the major axis of the elongated through orifice.
Claim 12
Dependent Claim
52 words
The device of claim 5 , the head of each screw further having a top portion of an essentially spherical shape, the plug further having a bottom surface, the bottom surface having a spherical cavity that is complementary in shape to the spherical shape of the top portion of each screw head.
Claim 13
Dependent Claim
31 words
The bone fixing device of claim 5 wherein the elongated through orifice has a length adapted to simultaneously receive at least two bone fastening screws and at least two corresponding plugs.
Claim 14
Dependent Claim
59 words
The bone fixing device of claim 5 , further comprising: a stiffness-attenuating material coupled to at least part of the screw head whereby stiffness of assembly between the link member and the bone fastening screw is reduced. wherein the stiffness-attenuating material comprises at least one piece of flexible material interposed and compressed between the screw head and the plug.
Claim 15
Dependent Claim
59 words
The bone fixing device of claim 13 wherein the stiffness-attenuating material is comprised of a plurality of flexible materials, each flexible material having different flexibilities so as to enable different degrees of stiffness attenuation between the link member and the bone fastening screw without varying the torque applied to the plug from one flexible material to another flexible material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-09-17 | 2005-03-19 | 2005-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-09-17 | 2009-03-19 | 2009-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-09-17 | 2013-03-19 | 2013-09-18 | $7700.00 | Window Closed / Lapsed |