The present invention relates generally to fixation devices used in orthopedic surgery. This invention relates more particularly to devices used for cervical posterior fixation by means of a plate attached to a bone in the occipital region and secured to a rod which attaches to a cable, wire, plate, or screw fastened in the spinal region.
Fixation devices are used in orthopedic surgery to stabilize bones such as those in the spinal column. One type of fixation device includes a plate attachable to a portion of a bone. The plate may be connected to another bone or another portion of the same bone, directly or through other connecting devices. For example, posterior fixation devices can include a plate fastened to the skull, or occiput, one or more rods running longitudinally along the spine and connected to the plate, and plates, cables, wires, hooks, screws, or other connectors attached to a vertebra and connected to the rod.
A number of such mechanisms are known in the act. To accommodate the variation in patient size and anatomy, a plate often needs to be chosen from a set of plates of multiple sizes and/or varying geometry. This results in a higher cost of the device assembly and a need to maintain separate inventory of the various size and geometry devices. It also increases the surgical time because the surgeon must search for the device that best fits the patient. Accordingly, there is a need for an improved fixation plate.
A fixation device for connecting a stabilization device to a bone comprises a first member comprising a first portion for attachment to a bone; a second member comprising a second portion for attachment to a bone and connected to the first member by a pivotal connection such that the first and second portions are spaced apart by an adjustable distance, at least one of the first and second members further comprising a portion for mounting a connector adapted to secure a stabilization device
A method of attaching a stabilization device to a bone comprises attaching a first plate to a bone at a first portion on the first plate; attaching a second plate, pivotally attached to the first plate, to a bone at a second portion on the second plate; pivotally adjusting the position of the second plate relative to the first plate to adjust the distance between the first portion and the second portion; and attaching a stabilization device to either the first plate or the second plate.
While multiple embodiments are disclosed, still other embodiments of the present invention will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments of the invention. As will be realized, the invention is capable of modifications in various obvious aspects, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.
While the invention is amenable to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and are described in detail below. The intention, however, is not to limit the invention to the particular embodiments described. On the contrary, the invention is intended to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
The second lateral member includes a proximal end 24, a distal end 26, and an attachment bore 28 located at the distal end 26. The midline member includes a proximal end 30 and a distal end 32. In the embodiment shown in
Similarly, the second lateral member 14 includes a pivot bore 44 located at the proximal end 24, the attachment bore 28 located at the distal end 26, and a fixation bore 46 interposed between the attachment bore 28 and the pivot bore 44. A groove 48 is interposed between the proximal end 24 and the distal end 26 and is located on a top surface 50. Alternatively, the groove 48 could be located in some other suitable area. The second lateral member 14 could include any appropriate number of grooves 48.
The midline member 16 includes a proximal end 30 and a distal end 32. A pivot bore 52 is located at the proximal end 30 and a fixation bore 54 is located at the distal end 32. A groove 56 is interposed between the proximal end 30 and the distal end 32 and is located on a top surface 58. The midline member 16 could include any appropriate number of grooves 56 located in any suitable area.
In the embodiment shown in
In the embodiment shown in
The three members 12, 14, and 16 can be attached to each other in a number of ways. In one embodiment of the invention, the members are swaged together so that they remain attached to each other while being handled but can be manipulated into different angular relationships to each other. Alternatively, the three members 12, 14, and 16 can remain separate until implantation into the patient 4, when they become linked to one another by the insertion of a fastener (not shown) into the pivot bores 36, 44, and 52. The fastener could be a rivet, screw, or any other suitable fastener.
The first and second lateral members 12 and 14 and the midline member 16 can include any configuration of fixation bores, attachment bores, and pivot bores suitable for achieving the desired variability in the distance 78 between the attachment bores 24 and 38. The number and the location of the fixation bores, attachment bores, and pivot bores can vary as needed.
The second lateral member 14 is positioned in the desired location against the occiput (block 220). The first lateral member 12 is positioned against the occiput and overlying the second lateral member 14 so that the pivot bores 36 and 44 rotate around a common axis 60 (block 225). The midline member 16 is then positioned against the occiput and overlying the first lateral member 12 (block 230). The pivot bore 52 is aligned with the pivot bores 36 and 44.
Next, fasteners are inserted through the pivot bore 52 and the fixation bore 54 of the midline member 16 and into the occiput, thereby attaching the midline member 16 to the occiput (block 235). The first lateral member 12 and the second lateral member 14 are rotated around the common axis 60 until the desired distance 80 between the attachment bosses 34 is achieved (block 240). The attachment bosses 34 are free to rotate in their bores 22 and 28. The fasteners are then inserted into the fixation bores 38 and 46 of the first and second lateral members 12 and 14, thereby fastening them to the occiput and fixing the position of the attachment bosses 34 (blocks 245 and 250). In this manner, the variable geometry occipital fixation device may be installed and adjusted to accommodate a variety of patient sizes and anatomy.
Various modifications and additions can be made to the exemplary embodiments discussed without departing from the scope of the present invention. Accordingly, the scope of the present invention is intended to embrace all such alternatives, modifications, and variations as fall within the scope of the claims, together with all equivalents thereof.
Number | Name | Date | Kind |
---|---|---|---|
4763644 | Webb | Aug 1988 | A |
4805602 | Puno | Feb 1989 | A |
4836193 | Ransford | Jun 1989 | A |
4841959 | Ransford | Jun 1989 | A |
4887596 | Sherman | Dec 1989 | A |
4950269 | Gaines, Jr. | Aug 1990 | A |
5129388 | Vignaud | Jul 1992 | A |
5360429 | Jeanson et al. | Nov 1994 | A |
5498264 | Schlapfer et al. | Mar 1996 | A |
5507745 | Logroscino et al. | Apr 1996 | A |
5520689 | Schlapfer et al. | May 1996 | A |
5531745 | Ray | Jul 1996 | A |
5542946 | Logroscino et al. | Aug 1996 | A |
5545164 | Howland | Aug 1996 | A |
5558674 | Heggeness et al. | Sep 1996 | A |
5653708 | Howland et al. | Aug 1997 | A |
5707372 | Errico et al. | Jan 1998 | A |
5713898 | Stucker et al. | Feb 1998 | A |
5928233 | Apfelbaum et al. | Jul 1999 | A |
5976135 | Sherman et al. | Nov 1999 | A |
6017343 | Rogozinski | Jan 2000 | A |
6077262 | Schlapfer et al. | Jun 2000 | A |
6146382 | Hurlbert | Nov 2000 | A |
6187005 | Brace et al. | Feb 2001 | B1 |
6238396 | Lombardo | May 2001 | B1 |
6296644 | Saurat et al. | Oct 2001 | B1 |
6302883 | Bono | Oct 2001 | B1 |
6315779 | Morrison | Nov 2001 | B1 |
6336927 | Rogozinski | Jan 2002 | B2 |
6368351 | Glenn et al. | Apr 2002 | B1 |
6379358 | Kuo | Apr 2002 | B1 |
6432109 | Letendart et al. | Aug 2002 | B1 |
6485491 | Farris et al. | Nov 2002 | B1 |
6524315 | Selvitelli et al. | Feb 2003 | B1 |
6547790 | Harkey, III et al. | Apr 2003 | B2 |
6620164 | Ueyama et al. | Sep 2003 | B2 |
6682532 | Johnson | Jan 2004 | B2 |
6832999 | Ueyama et al. | Dec 2004 | B2 |
6902565 | Berger et al. | Jun 2005 | B2 |
6949123 | Reiley | Sep 2005 | B2 |
6958065 | Ueyama et al. | Oct 2005 | B2 |
7033377 | Miller | Apr 2006 | B2 |
7060069 | Kozak et al. | Jun 2006 | B2 |
7232441 | Altarac et al. | Jun 2007 | B2 |
7250052 | Landry et al. | Jul 2007 | B2 |
7491218 | Landry et al. | Feb 2009 | B2 |
20020049446 | Harkey et al. | Apr 2002 | A1 |
20020120268 | Berger | Aug 2002 | A1 |
20030004512 | Farris et al. | Jan 2003 | A1 |
20030036759 | Musso | Feb 2003 | A1 |
20030153913 | Altarac et al. | Aug 2003 | A1 |
20030163132 | Chin | Aug 2003 | A1 |
20030176863 | Ueyama et al. | Sep 2003 | A1 |
20040122426 | Michelson | Jun 2004 | A1 |
20040127904 | Konieczynski et al. | Jul 2004 | A1 |
20040153070 | Barker et al. | Aug 2004 | A1 |
20040172022 | Landry | Sep 2004 | A1 |
20040267259 | Mazda et al. | Dec 2004 | A1 |
20050010227 | Paul | Jan 2005 | A1 |
20050080417 | Alexis et al. | Apr 2005 | A1 |
20050124994 | Berger et al. | Jun 2005 | A1 |
20050216005 | Howland | Sep 2005 | A1 |
20050228382 | Richelsoph et al. | Oct 2005 | A1 |
20050240185 | Boomer et al. | Oct 2005 | A1 |
20050251141 | Frigg et al. | Nov 2005 | A1 |
20050273104 | Oepen et al. | Dec 2005 | A1 |
20050277939 | Miller | Dec 2005 | A1 |
20050283153 | Poyner et al. | Dec 2005 | A1 |
20050288669 | Abdou | Dec 2005 | A1 |
20060004359 | Kramer et al. | Jan 2006 | A1 |
20060004360 | Kramer et al. | Jan 2006 | A1 |
20060004363 | Brockmeyer et al. | Jan 2006 | A1 |
20060155284 | Doherty et al. | Jul 2006 | A1 |
20060184170 | Kapitan et al. | Aug 2006 | A1 |
20060217710 | Abdou | Sep 2006 | A1 |
20060217723 | Suh | Sep 2006 | A1 |
20060264932 | Bert | Nov 2006 | A1 |
20070016189 | Lake | Jan 2007 | A1 |
20070083201 | Jones et al. | Apr 2007 | A1 |
20070118121 | Purcell et al. | May 2007 | A1 |
20070123872 | Brockmeyer et al. | May 2007 | A1 |
20070299441 | Hoffman | Dec 2007 | A1 |
20080051783 | Null et al. | Feb 2008 | A1 |
20080086124 | Forton | Apr 2008 | A1 |
20080125781 | Hoffman | May 2008 | A1 |
20080147123 | Schermerhorn | Jun 2008 | A1 |
20080177313 | Lemoine | Jul 2008 | A1 |
20080177314 | Lemoine | Jul 2008 | A1 |
20080300635 | Lieponis | Dec 2008 | A1 |
Number | Date | Country |
---|---|---|
0 737 449 | Oct 1996 | EP |
1180348 | Dec 2008 | EP |
2 687 567 | Feb 1992 | FR |
2 760 629 | Mar 1997 | FR |
WO 9531147 | Nov 1995 | WO |
WO 9723170 | Jul 1997 | WO |
WO 9841160 | Sep 1998 | WO |
WO 2005122922 | Dec 2005 | WO |
WO 2006019370 | Feb 2006 | WO |
WO2006102222 | Sep 2006 | WO |
WO 2006096756 | Sep 2006 | WO |
WO 2007044716 | Apr 2007 | WO |
WO2006102222 | Sep 2007 | WO |
WO 2007146482 | Dec 2007 | WO |
WO 2008042633 | Apr 2008 | WO |
Number | Date | Country | |
---|---|---|---|
20060229610 A1 | Oct 2006 | US |