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Publication numberUS20020128653 A1
Publication typeApplication
Application numberUS 09/932,485
Publication dateSep 12, 2002
Filing dateAug 17, 2001
Priority dateMar 9, 2001
Also published asUS6440131
Publication number09932485, 932485, US 2002/0128653 A1, US 2002/128653 A1, US 20020128653 A1, US 20020128653A1, US 2002128653 A1, US 2002128653A1, US-A1-20020128653, US-A1-2002128653, US2002/0128653A1, US2002/128653A1, US20020128653 A1, US20020128653A1, US2002128653 A1, US2002128653A1
InventorsGeorge Haidukewych
Original AssigneeHaidukewych George J.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Acetabular bone plate
US 20020128653 A1
Abstract
An acetabulum bone plate includes a central, support portion which is shaped to cover the posterior wall of the acetabulum and a pair of tabs which extend therefrom and attach to the pelvis. Spikes formed on the underside of the central portion engage bone fragments and fix them in place when fragment screws that extend through openings in the central portion are tightened. The fragment screws are angled away from the hip joint.
Images(4)
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Claims(9)
1. A bone plate for attachment to the acetabulum wall of a subject which comprises:
a support portion formed from metal and curved in shape to wrap around a portion of the acetabulum wall, and having a width sufficient to cover a posterior region of the acetabulum wall extending substantially from its rim to its base;
a pair of tabs integrally formed with the support portion and extending from opposite ends thereof, the tabs each having a width substantially less than the width of the support portion and each having openings for receiving bone screws that fasten the tabs to bone surface adjacent the acetabulum wall; and
wherein the support portion includes openings for bone screws that fasten the support portion to the acetabulum wall.
2. The bone plate as recited in claim 1 in which the openings in the support portion are shaped to direct the bone screws therein away from the hip joint defined by the acetabulum wall.
3. The bone plate as recited in claim 2 in which the screws passing through the support portion are directed at an angle from 45 to 60 away from perpendicular.
4. The bone plate as recited in claim 1 in which the support portion and the tabs are formed from titanium.
5. The bone plate as recited in claim 1 in which the support portion has a substantially straight edge which is positioned along the rim of the acetabulum wall, and a curved edge which is positioned near the base of the acetabulum wall.
6. The bone plate as recited in claim 1 which includes spikes integrally formed on the bottom surface of the support portion and extending away therefrom to engage and penetrate the acetabulum wall when the support portion is fastened in place.
7. The bone plate as recited in claim 6 which includes a plurality of spikes located along an edge of the support portion which extends along the ridge of the acetabulum wall.
8. The bone plate as recited in claim 7 in which the openings in the support portion are shaped to direct the bone screws therein away from the hip joint defined by the acetabulum wall.
9. The bone plate as recited in claim 8 in which the support portion, tabs and spikes are formed from titanium.
Description
  • [0001]
    RELATED PATENT APPLICATIONS
  • [0002]
    This application is based on U.S. Provisional Application Serial No. 60/274,906 filed on Mar. 9, 2001 and entitled “Acetabular Bone Plate”.
  • BACKGROUND OF THE INVENTION
  • [0003]
    The field of the invention is implantable plates which are attached to damaged or diseased bones, and more particularly, to bone plates attached to the surface of the pelvis.
  • [0004]
    A bone plate is a plate that is fastenable to the surface of a bone to immobilize a fracture in the bone or to support and stabilize a diseased region of the bone. The plate is typically made of a surgical grade metal such as stainless steel or titanium which has a very high tensile strength. The plate may be shaped to fit the contour of specific bone surfaces as described in U.S. Pat. No. 4,454,876; U.S. Pat. No.4,800,874; U.S. Pat. No. 5,904,684 and U.S. Pat. No. 6,004,353, or the bone plate may be shaped by the surgeon during the operation as described in U.S. Pat. No. 4,573,458; U.S. Pat. No. 5,746,742 and U.S. Pat. No. 5,785,712. The bone plate is typically attached to the bone with screws that pass through judiciously placed holes in the plate.
  • [0005]
    The acetabulum is a circular-shaped ridge, or wall, of bone that defines a socket for receiving the semi-spherical head of the femur to form the hip joint. The most common fracture of the acetabulum is in its posterior wall. Multiple fractures forming small wall fragments are often found, and these multiple bone fragments must be fixed. This is currently done by cutting and bending multiple bone plates to fix the multiple bone fragments in place. This is a lengthy and challenging procedure for the surgeon. In addition, because the acetabulum wall forms part of a working joint, care must be taken when fastening each bone plate in place that none of the screws pass into the joint itself and interfere with joint operation.
  • SUMMARY OF THE INVENTION
  • [0006]
    The present invention is a bone plate which is shaped to fit the surface of the posterior acetabulum wall for fixing fractures therein. More particularly, the shaped bone plate includes a central portion which is shaped to fit directly over the posterior wall of the acetabulum and narrower tabs which extend in opposite directions from the central portion. Openings are provided in the central portion and the tabs for receiving mounting screws, and the openings in the central portion are shaped to guide screws away from the hip joint. Spikes are formed on the underside of the central portion to engage and fix multiple bone fragments.
  • [0007]
    A general object of the invention is to provide a bone plate which can be used to fix fractures of the posterior acetabulum wall. The wide central portion of the bone plate provides support in the fracture zone and the tabs hold it firmly in place. Multiple bone fragments are fixed to the bone plate by screws passing through openings in the central portion and spikes on its underside.
  • [0008]
    The foregoing and other objects and advantages of the invention will appear from the following description. In the description, reference is made to the accompanying drawings which form a part hereof, and in which there is shown by way of illustration a preferred embodiment of the invention. Such embodiment does not necessarily represent the full scope of the invention, however, and reference is made therefore to the claims herein for interpreting the scope of the invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0009]
    [0009]FIG. 1 is a pictorial representation of the preferred embodiment of a bone plate which practices the present invention attached to the pelvis;
  • [0010]
    [0010]FIG. 2 is a top view of the bone plate in FIG. 4;
  • [0011]
    [0011]FIG. 3 is a side view of the bone plate in FIG. 1;
  • [0012]
    [0012]FIG. 4 is a view in cross-section through a central portion of the bone plate of FIG. 1; and
  • [0013]
    [0013]FIG. 5 is a bottom view of the bone plate of FIG. 1.
  • DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0014]
    Referring particularly to FIGS. 2 and 3, the acetabular bone plate 5 is comprised of a central, support portion 10 disposed between integrally formed tab portions 12 and 14. The bone plate 5 is preferably formed of a titanium alloy to allow postoperative MR imaging of the joint. Stainless steel may also be used, but this limits the use of subsequent MR imaging which may become necessary to diagnose postoperative complications.
  • [0015]
    The support portion 10 of the bone plate 5 has a width that is approximately twice the width of the tab portions 12 and 14. It is also about twice the width of currently available bone plates. As shown best in FIG. 3, the support portion 10 is curved to wrap around the circular-shaped posterior acetabulum wall. As shown best in FIG. 1, the support portion 10 substantially covers the posterior acetabulum wall 20, from its rim to its base. One tab portion 12 is secured in place on the pelvis by up to three small (i.e. 3.5 or 4.0 mm) fragment screws 22, and the other tab portion 14 is secured in place by up to three small fragment screws 24. The tab portions 12 and 14 can be bent as needed by the physician to fit the contour of the bone surface. The central, support portion 10 is thus firmly fixed in place to provide support for substantially the entire posterior wall 20.
  • [0016]
    Bone fragments formed by fractures in the posterior acetabulum wall are fixed to the bottom surface of the support portion 10. This is achieved by a set of from one to three small fragment screws 26 which pass through openings 28 in the support portion 10 and into the underlying bone. As shown best in FIG. 4, a buttress 27 is formed to one side of each opening 28 and the openings 28 are formed at an angle of from 45 to 60 from perpendicular. This enables the fragment screws 26 to be inserted at an angle such that their ends extend away from the hip joint preventing accidental joint penetration. The underside of each screw head 30 engages the sloped surface of the buttress 27 to securely tighten the central portion 10 against the bone surface and fix bone fragments in place.
  • [0017]
    As shown best in FIGS. 3 and 5, a set of spikes 16 are formed on the underside of the support portion 10. These spikes 16 pierce the underlying bone when the bone plate 5 is fastened in place with screws 22, 24 and 26. They serve to fix to the support portion 10 underlying bone fragments. In the preferred embodiment three spikes 16 are formed along a straight edge 32 of the support portion 10, which extends along the rim of the acetabulum wall. These rim spikes 16 are very useful in fixing small comminuted and small rim fractures. Another set of spikes 16 are located near the opposite, curved edge 34 of the support portion 10. These spikes 16 engage near the base of the acetabulum. These spikes also prevent displacement of the underlying fracture fragments when the screws are tightened, driving the spikes into the underlying bone.
  • [0018]
    Referring particularly to FIG. 2, the acetabulum bone plate 5 is symmetrical about a central axis 36. As a result, the same bone plate 5 can be used on either the right or left side of the hip simply by rotating it 180 such that the straight edge 32 aligns with the rim of the acetabulum wall.
  • [0019]
    The acetabular bone plate 5 facilitates the repair of fractures. Because of its shape, a single bone plate 5 may be used to fix multiple fragments. The support portion 10 is shaped and sized to provide mechanical support for the entire posterior wall of the acetabulum. The use of a single device to make such repairs saves considerable operating time.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7572277 *Jan 30, 2003Aug 11, 2009Warsaw Orthopedic, Inc.Spinal osteosynthesis connector and instrumentation
US7842037Sep 27, 2006Nov 30, 2010Dupuy Products, Inc.Flexible bone fixation device
US7988691Feb 13, 2007Aug 2, 2011Depuy Products, Inc.Orthopaedic trauma bone plate kit
US8114080Sep 13, 2007Feb 14, 2012Depuy Products, Inc.Flexible bone fixation device
US8157869Jan 10, 2008Apr 17, 2012Biomet Manufacturing Corp.Knee joint prosthesis system and method for implantation
US8163028Aug 5, 2009Apr 24, 2012Biomet Manufacturing Corp.Knee joint prosthesis system and method for implantation
US8187280Oct 9, 2008May 29, 2012Biomet Manufacturing Corp.Knee joint prosthesis system and method for implantation
US8328873Mar 23, 2010Dec 11, 2012Biomet Manufacturing Corp.Knee joint prosthesis system and method for implantation
US8343154Sep 26, 2007Jan 1, 2013Biomet C.V.Modular bone plate system
US8449581May 7, 2007May 28, 2013Stryker Trauma GmbhSliding plate with reinforced slot
US8480751Aug 2, 2012Jul 9, 2013Biomet Manufacturing, LlcKnee joint prosthesis system and method for implantation
US8562616Oct 9, 2008Oct 22, 2013Biomet Manufacturing, LlcKnee joint prosthesis system and method for implantation
US8795343Feb 6, 2009Aug 5, 2014DePuy Synthes Products, LLCPelvic Cable Solution
US8828009Aug 25, 2011Sep 9, 2014Smith & Nephew, Inc.Implants, surgical methods, and instrumentation for use in femoroacetabular impingement surgeries
US8900320Feb 25, 2010Dec 2, 2014Smith & Nephew, IncMethods and apparatus for FAI surgeries
US8936648Mar 12, 2013Jan 20, 2015Biomet Manufacturing, LlcKnee joint prosthesis system and method for implantation
US9101428Nov 30, 2012Aug 11, 2015Biomet C.V.Modular bone plate system
US9339388 *May 23, 2012May 17, 2016Association Marie LannelongueOsteosynthesis implant
US9504577Nov 6, 2014Nov 29, 2016Smith & Nephew, Inc.Methods and apparatus for FAI surgeries
US20050090825 *Feb 15, 2002Apr 28, 2005Medartis AgBone plate
US20050154388 *Jan 30, 2003Jul 14, 2005Pierre RoussoulySpinal osteosynthesis connector and instrumentation
US20080097432 *Sep 27, 2006Apr 24, 2008Depuy Products, Inc.Flexible bone fixation device
US20080234676 *Feb 13, 2007Sep 25, 2008Depuy Products, Inc.Orthopaedic trauma bone plate kit
US20080281327 *May 7, 2007Nov 13, 2008Stryker TraumaSliding plate with reinforced slot
US20090082813 *Sep 26, 2007Mar 26, 2009Depuy Products, Inc.Modular bone plate system
US20090082816 *Sep 20, 2007Mar 26, 2009Graham Matthew RRemodelable orthopaedic spacer and method of using the same
US20100298893 *Feb 6, 2009Nov 25, 2010Simon StuckiPelvic Cable Solution
US20140163691 *May 23, 2012Jun 12, 2014Philippe DartevelleOsteosynthesis implant
CN102421390A *Feb 25, 2010Apr 18, 2012史密夫和内修有限公司Methods and apparatus for fai surgeries
CN103654933A *Dec 27, 2013Mar 26, 2014杨鹏Acetabular anterior wall anatomical steel plate
EP1990017A1May 7, 2007Nov 12, 2008Stryker Trauma GmbHSliding plate with reinforced slot
WO2010099247A3 *Feb 25, 2010Feb 24, 2011Smith & Nephew, Inc.Methods and apparatus for fai surgeries
Classifications
U.S. Classification606/286, 606/280, 623/22.21, 606/907, 606/298, 606/902
International ClassificationA61B17/80
Cooperative ClassificationY10S606/907, Y10S606/902, A61B17/8066, A61B17/8061
European ClassificationA61B17/80H2, A61B17/80H
Legal Events
DateCodeEventDescription
Aug 17, 2001ASAssignment
Owner name: MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAIDUKEWYCH, GEORGE J.;REEL/FRAME:012111/0511
Effective date: 20010809
Mar 15, 2006REMIMaintenance fee reminder mailed
Aug 28, 2006LAPSLapse for failure to pay maintenance fees
Oct 24, 2006FPExpired due to failure to pay maintenance fee
Effective date: 20060827