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Publication numberUS3695259 A
Publication typeGrant
Publication dateOct 3, 1972
Filing dateNov 10, 1970
Priority dateNov 10, 1970
Publication numberUS 3695259 A, US 3695259A, US-A-3695259, US3695259 A, US3695259A
InventorsYost Clyde E
Original AssigneeYost Clyde E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Bone plate
US 3695259 A
Images(1)
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Description  (OCR text may contain errors)

United States Patent Yost [ 51 Oct. 3, 1972 BONE PLATE [72] Inventor: Clyde E. Yost, 700 S. Villa Drive,

Evansville, Ind. 47714 [22] Filed: Nov. 10, 1970 [21] Appl. No.: 88,337

[52] US. Cl. ..l28/92 D [51] Int. Cl. ..A61f 5/04 [58] Field of Search.....l28/92 D, 92 R, 92 B, 92 BA, 128/92 BB, 92 BC [56] References Cited UNITED STATES PATENTS 2,443,363 6/1948 Townsend et al ..128/92 D 3,463,148 8/1969 Treace ..l28/92 R FOREIGN PATENTS OR APPLICATIONS 373,516 1/1964 Switzerland.. ..l28/92 BA OTHER PUBLICATIONS Fracture Appliances (Catalog) by DePuy Mfg. Co.,.

lnc., Warsaw, Ind., 1954, page 124 A relied upon (lntramedullary Bars-Livingston Type, Cat. no. 6495) Fixation of Bones by Plates and Screws by L. T. Peterson, Journal of Bone & Joint Surgery, Vol. 29, No. 2, April 1947, p. 335- 347, 128- 92B Primary Examiner-Richard A. Gaudet Assistant Examiner-Ronald L. Frinks Attorney-Lamon, Taylor & I-Iinds [57] ABSTRACT The invention relates to a plate adapted to be secured to a bone surface in order to set broken bones, the plate having a modified I configuration in cross section for maximum strength characteristics and to enable the plate to be fitted against bones of varying surface contours, while the plate is of minimum thickness. The plate is provided with a plurality of countersunk apertures or slots to enable the plate to be secured to the bone by means of screws.

6 Claims, 4 Drawing Figures BONE PLATE The present invention relates to a bone plate and more particularly to a bone plate having a modified I shape in cross section with the plate being of minimum thickness and providing maximum rigidity.

Heretofore bone plates have been generally fiat with apertures therein so that bone screws may be passed through the plate into the bone. In order to give these plates the necessary strength and rigidity they are generally formed of uniformly relatively thick stock. Alternatively these plates have been made of thinner stock but with reinforcement at the apertures. Difficulty has been encountered in that the plates could not fit snugly against bones of varying configuration.

According to the present invention there is provided a bone plate having a modified I beam cross section such that the plate provides maximum strength with minimum thickness. Furthermore, the plate is of such a configuration that it is adapted to fit against bones having varying curvatures. The plate is provided with counter sunk apertures which may be in the form of slots so that the plate can be adjusted or replaced after being screwed into position on the bone. The plate according tothe present invention'may be made from rolled formed stock.

A primary object of the present invention is to provide a bone plate which is of minimum thickness and yet which provides maximum strength characteristics.

A further object of the present invention is to provide a bone plate which may be replaced or adjusted after fixation to a bone.

Still other objects and many of the attendant advantages of the present invention will become more readily apparent upon consideration of the following detailed description in connection with the accompanying drawings wherein:

FIG. 1 is a plan view of a bone plate according to the present invention,

FIG. 2 is a sectional view along the line 2-2 of FIG. 1,

FIG. 3 is a sectional view showing the dimensional relationships of various portions of the plate and FIG. 4 is a sectional view of a modified embodiment of the bone plate. 1

Referring now more specifically to the drawings wherein like numerals indicate like parts throughout the several views there is shown at 1 in FIG. 1 a bone plate which is preferably formed of low carbon vacuum melt stainless steel. Adjacent each end of the plate are a series of apertures 2 which may be in the form of slots. These slots are adapted to receive bone screws for securing the plate to the surface of a bone. By providing slots in the bone plate it is possible to adjust the position of the plate with respect to the bone screws should it be necessary to relocate the bone plate or replace the plate due to absorption of the bone or the necessity for resetting the bone fixation.

As clearly shown in FIG. 2 the bone plate is shaped in a modified I cross section. The central portion 3 is provided with flanged side portions 4 and 5. The elongated rounded shape of these flanged side portions may conveniently be referred to as being of generally oval cross section. The outer peripheral surface of the flanged side portions 4 and S are convexly curved as shown at 6 and 7 respectively, the curvature extending inwardly towards the upper surface of the bone plate. The peripheral edges of the flanged portions 4 and are rounded as shown at 8, 9, 10 and 11 so as to present no sharp edges and to provide a surface which will permit the snug engagement of the bone plate with bones having varying contours as shown, for example, by the engagement of the rounded flanged portions 8 and 11 with the curved bone shown diagrammatically at 12. The slotted aperture 2 has a chamfered surface 13 ad- 10 jacent the upper surface of the bone plate. This permits the bone screws to be received within the bone plate without any portions of the screws projecting beyond the peripheral edges of the plate.

In FIG. 4 there is shown a modified design of a bone plate wherein there is provided a washer 14 which has a chamfered aperture 15 therein adapted to be aligned with the bone screw aperture 16 in plate 17. It can be seen that the washer 14 is of such dimensions that it does not project beyond the peripheral edges of the bone plate 17.

The dimensional configurations of the bone plate constructed in accordance with the present invention are critical. It is desirable to provide a bone plate with maximum strength characteristics and yet with minimum dimensions in order to reduce trauma in the patient. It has been found that with the modified I beam design great strength can be achieved using a minimum of metal. The I beam design also permits the bone plate to fit against bones of varying configuration as shown in FIG. 2. The most commonly used sizes for bone plates are as, k, and inch. In FIG. 3 there is shown diagrammatically a cross section of the modified I beam design bone plate with the dimensional relationships shown by letter designation. These critical dimensional relationships are as follows:

N A B C D E 0.319 it; 0.375 0.338 0.431 0.290 0.019 0.425 A 0.500 0.450 0.575 0.387 0.025 0.53l 0.625 0.563 0.719 0.484 0.03l 0.637 34 0.750 0.677 0.863 0.581 0.037 F G H .l K

0.026 0.019 0.019 0.l03 0.l22 0.034 0.025 0.025 0. l 38 0. l 62 0.043 0.031 0.03l 0.172 0.203 0.052 0.037 0.037 0.206 0.244 K M 0.298 0.323 0.397 0.43I 0.496 0.539 0.595 0.647

The plate shown and described herein not only posesses marked strength characteristics but is economical to manufacture. The plate may be used to replace any bone plates currently available, particularly where the slotted configuration with washer as shown in FIG. 4 is utilized. The bone screw and washer can be slid along the slot to line up with the previous hole in the bone to prevent drilling of another hole in the bone.

Obviously many modifications and variations of the present invention are possible in light of the foregoing teachings. What is claimed as new and is desired to be securred by Letters Patent is:

I claim:

1. A bone plate adapted to be secured to the exterior surface of a bone comprising:

an elongated plate of modified I shape having a pair of generally parallel side flanges, each of generally oval cross-section with one of the longer sides of the generally oval cross-section of each side flange facing the other side flange, the ends of said generally oval cross-sections being rounded on at least one side of the elongated plate to conform to bone surfaces of varying contours, and a central portion integral with said side flanges and extending between them, intersecting the side flanges at an intermediate point along the said facing long sides of their generally oval cross-sections, said central portion being of the same thickness across its width, from its intersection with one of said side flanges to its intersection with the other side flange, said thickness being less than the dimension of the side flanges taken in the longer direction of the said generally oval cross-section and apertures in said central portion to receive screws for securing to the bone. 2. A bone plate according to claim 1, wherein said apertures are countersunk on one surface of the central portion and the outer side faces of the side flanges are curved inwardly in a direction towards the countersunk apertured surface.

3. A bone plate according to claim 2, wherein said apertures comprise slots extending longitudinally in said central portion.

4. A bone plate according to claim 1, the surfaces of said central portion being curved in a direction transverse to the longitudinal direction of the plate, both surfaces being curved in the same direction as each other so as to extend substantially parallel and in space relation with respect to the surface of the bone to which the plate is adapted to be secured.

5. A bone plate according to claim 4, wherein said apertures comprise slots extending along the longitudinal axis of said central portion and including washers having countersunk apertures therein, said washers being located on one side of said central portion and having a thickness substantially equal to the distance which said flanged sides extend perpendicularly away from said one surface of the central portion.

6. A bone plate according to claim 1, having a total width from the outside of one side flange to the outside of the other flange within the range of 0.375 to 0.750 inches, said central portion having a thickness within the range of 0.093 to 0.186 inches, and the side flanges having a thickness within the range of 0.167 to 0.333 inches.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4612920 *Nov 6, 1984Sep 23, 1986Zimmer, Inc.Compression hip screw
US4957497 *Jul 13, 1989Sep 18, 1990Thomas HooglandDevice for osteosynthesis
US5730743 *May 3, 1995Mar 24, 1998Eberle Medizintech ElementeSupporting grid
US5733287 *Apr 26, 1996Mar 31, 1998Synthes (U.S.A.)Bone plate
US5772662 *Dec 6, 1996Jun 30, 1998Howmedica Inc.Femoral fixation system
US5797912 *Aug 19, 1997Aug 25, 1998Terray CorporationApparatus for stabilizing a fracture in a bone
US6123709 *Jul 25, 1997Sep 26, 2000Jones; Andrew R.Bone buttress plate and method of using same
US6235034 *Oct 23, 1998May 22, 2001Robert S. BrayBone plate and bone screw guide mechanism
US6413259Dec 14, 2000Jul 2, 2002Blackstone Medical, IncBone plate assembly including a screw retaining member
US6592578Feb 23, 2001Jul 15, 2003Howmedica Leibinger, Inc.Device for locally heating a bioabsorbable plate
US6645210 *Jul 19, 2002Nov 11, 2003Easton L. MandersonRod implant for osteosynthesis of long bones
US6712073 *Jan 19, 2001Mar 30, 2004Easton L. MandersonExtramedullary rod implant for long bones
US6723098 *Mar 12, 2002Apr 20, 2004Mrugesh K. ShahBone fixation plate having clip members
US6793658Nov 6, 2001Sep 21, 2004Society De Fabrication De Material Orthopedique, S.A.Anterior plating system and method
US6884242Oct 25, 2002Apr 26, 2005Society De Fabrication De Materiel Orthopedique, S.A.Anterior plating system and method
US6890335 *Aug 24, 2001May 10, 2005Zimmer Spine, Inc.Bone fixation device
US6989012Aug 15, 2002Jan 24, 2006Sdgi Holdings, Inc.Plating system for stabilizing a bony segment
US7204837Jul 24, 2003Apr 17, 2007Paul Kamaljit SSpinal plate assembly
US7229445Jun 21, 2004Jun 12, 2007Synthes (Usa)Bone plate with bladed portion
US7255699Jul 24, 2003Aug 14, 2007Paul Kamaljit SSpinal plate assembly
US7273481Oct 1, 2003Sep 25, 2007Blackstone Medical, Inc.Bone plate assembly provided with screw locking mechanisms
US7416553Apr 9, 2003Aug 26, 2008Depuy Acromed, Inc.Drill guide and plate inserter
US7678113Apr 19, 2005Mar 16, 2010Warsaw Orthopedic, Inc.Antero-lateral plating systems and methods for spinal stabilization
US7740649Oct 26, 2004Jun 22, 2010Pioneer Surgical Technology, Inc.Bone plate system and methods
US7758616Aug 6, 2004Jul 20, 2010Warsaw Orthopedic, Inc.Anterior plating system and method
US7766911Dec 5, 2005Aug 3, 2010Theken Spine, LlcFixed and variable locking fixation assembly
US7776047Feb 11, 2004Aug 17, 2010Depuy Spine, Inc.Guide for spinal tools, implants, and devices
US7780666Jun 1, 2005Aug 24, 2010Theken Spine, LlcFixed and variable locking fixation assembly
US7785327Jun 1, 2005Aug 31, 2010Theken Spine, LlcFixed and variable locking fixation assembly
US7833226 *Apr 20, 2005Nov 16, 2010Zimmer Spine, Inc.Bone fixation device
US7867261 *Nov 7, 2006Jan 11, 2011Depuy Products, Inc.Bone plate with variable torsional stiffness at fixed angle holes
US7909829Jun 27, 2003Mar 22, 2011Depuy Spine, Inc.Tissue retractor and drill guide
US7909848Feb 11, 2004Mar 22, 2011Depuy Spine, Inc.Tissue retractor and guide device
US7909859Oct 26, 2005Mar 22, 2011Pioneer Surgical Technology, Inc.Bone plate system and methods
US7935123Sep 17, 2003May 3, 2011Depuy Acromed, Inc.Drill guide with alignment feature
US7951176May 11, 2004May 31, 2011Synthes Usa, LlcBone plate
US8016863May 11, 2004Sep 13, 2011Warsaw Orthopedic, Inc.Anterior lumbar plate and method
US8029507 *Aug 21, 2009Oct 4, 2011Pega Medical, Inc.Orthopedic method for correcting angular bone deformity
US8062296Mar 17, 2005Nov 22, 2011Depuy Products, Inc.Modular fracture fixation plate system with multiple metaphyseal and diaphyseal plates
US8070784Nov 18, 2005Dec 6, 2011Warsaw Orthopedic, Inc.Plating system for stabilizing a bony segment
US8075602Sep 14, 2007Dec 13, 2011Blackstone Medical, Inc.Bone plate assembly provided with screw locking mechanisms
US8109980Feb 23, 2010Feb 7, 2012Kyphon SarlAntero-lateral plating systems and methods for spinal stabilization
US8172885Feb 5, 2004May 8, 2012Pioneer Surgical Technology, Inc.Bone plate system
US8221476Apr 13, 2007Jul 17, 2012Paul Kamaljit SSpinal plate assembly
US8236033Aug 13, 2007Aug 7, 2012Paul Kamaljit SSpinal plate assembly
US8246664Feb 24, 2009Aug 21, 2012Osteomed LlcMultiple bone fusion plate
US8361126Aug 27, 2008Jan 29, 2013Pioneer Surgical Technology, Inc.Bone plate system
US8388662May 21, 2010Mar 5, 2013Warsaw Orthopedic, IncAnterior plating system and method
US8394098Mar 17, 2006Mar 12, 2013Biomet C. V.Modular fracture fixation plate system
US8394107Jul 16, 2010Mar 12, 2013Depuy Spine, Inc.Guide for spinal tools, implants, and devices
US8394130Sep 28, 2006Mar 12, 2013Biomet C.V.Modular fracture fixation system
US8409208Oct 5, 2009Apr 2, 2013M. Samy AbdouDevice and method to access the anterior column of the spine
US8419775Feb 5, 2010Apr 16, 2013Biomet C.V.Method of implanting a modular fracture fixation system
US8439957Dec 9, 2011May 14, 2013Blackstone Medical, Inc.Bone plate assembly provided with screw locking mechanisms
US8470007Nov 22, 2011Jun 25, 2013Warsaw Orthopedic, Inc.Antero-lateral plating systems and methods for spinal stabilization
US8529608Apr 28, 2009Sep 10, 2013Osteomed LlcBone plate with a transfixation screw hole
US8617224Aug 5, 2011Dec 31, 2013Warsaw Orthopedic, Inc.Anterior lumbar plate and method
US8623019Jul 3, 2008Jan 7, 2014Pioneer Surgical Technology, Inc.Bone plate system
US8747442Aug 28, 2012Jun 10, 2014Biomet C.V.Method of implanting a modular fracture fixation system
US20080200955 *Feb 17, 2006Aug 21, 2008KyonPlate and Screws for Treatment of Bone Fractures
US20120059424 *Mar 10, 2011Mar 8, 2012Advanced Orthopaedic Solutions, Inc.Clavicle Bone Plate
DE102009055826A1Nov 25, 2009May 26, 2011Universitätsklinikum JenaDevice for plate osteosynthesis, has plate system with multiple application specific, stacked, lockable, uniform or curved individual plates of different forms and sizes
EP0048038A1 *Apr 9, 1981Mar 24, 1982CISE- Centro Informazioni Studi Esperienze S.p.A.Plate for setting a broken bone
EP0181433A1 *Jun 15, 1985May 21, 1986HOWMEDICA INTERNATIONAL, INC. Zweigniederlassung KielOsteosynthesis plate
EP0241914A2 *Apr 14, 1987Oct 21, 1987Huta BaildonT-shaped plate for connecting bone splinters with bone shafts and associated screws
EP0274713A1 *Dec 18, 1987Jul 20, 1988Huta Baildon Przedsiebiorstwo PanstwoweA stabilizer for the treatment of fractures of the neck and upper metaphysis of the femur
EP0436885A2 *Dec 18, 1990Jul 17, 1991Anton Prof. Dr. HärleAuxiliary osteosynthesis screw
EP0466280A2 *Jun 18, 1987Jan 15, 1992Howmedica Inc.Components of a modular femoral fixation system
EP0530585A2 *Aug 18, 1992Mar 10, 1993Synthes AG, ChurSelf-locking resorbable screws and plates for internal fixation of bone fractures and tendon-to-bone attachment
EP0626827A1 *Feb 4, 1993Dec 7, 1994Danek Medical, Inc.Spinal fixation system
EP0684017A1 *May 2, 1995Nov 29, 1995Synthes AG, ChurBone plate
EP1693013A1 *Feb 22, 2005Aug 23, 2006KyonPlate and screws for treatment of bone fractures
WO2001062136A2 *Feb 23, 2001Aug 30, 2001Stryker InstrBioabsorbable plates, fasteners, tools and method of using same
WO2006089695A1 *Feb 17, 2006Aug 31, 2006KyonPlate and screws for treatment of bone fractures
Classifications
U.S. Classification606/288, 606/280
International ClassificationA61B17/80, A61B17/68, A61B17/86
Cooperative ClassificationA61B17/8695, A61B17/80, A61B17/8033
European ClassificationA61B17/80