Búsqueda Imágenes Maps Play YouTube Noticias Gmail Drive Más »
Iniciar sesión
Usuarios de lectores de pantalla: deben hacer clic en este enlace para utilizar el modo de accesibilidad. Este modo tiene las mismas funciones esenciales pero funciona mejor con el lector.

Patentes

  1. Búsqueda avanzada de patentes
Número de publicaciónUS2443363 A
Tipo de publicaciónConcesión
Fecha de publicación15 Jun 1948
Fecha de presentación13 Abr 1942
Fecha de prioridad13 Abr 1942
Número de publicaciónUS 2443363 A, US 2443363A, US-A-2443363, US2443363 A, US2443363A
InventoresGilfillan Charles W, Kenneth Townsend
Cesionario originalGilfillan Charles W, Kenneth Townsend
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Bone plate
US 2443363 A
Imágenes(1)
Previous page
Next page
Descripción  (El texto procesado por OCR puede contener errores)

June 15, 1948. K. TOWNSEND ET AL- 2,443,363

. BONE PLATE Filed A ril 13, 1942 a I fi r anei' z, .Zbzqnsend WGZEZZWENTORS Patented June 15, 1948 BONE PLATE? Kenneth Townsend and iCharlesrw-nGilfillama-g Hollywood, Calif.

Application April 13, 194258crialfNoi438i838 2 Glaimsa (Cl. 1284-9929 Our invention relates to the art of bone setting, and-*has among its obj-eets and advantages -s.

theprovisionM an-improved 'b'o'ne plate.-"=--- In accompanying drawing Figure- 1 is a View of afi-"a'c'tl ired iemurillu's-fi trating ourinvention applied-thereto Figure 2 is a face.viewvofe-the-bone plate structure applied to the femur of Figure 1;

Figure -3 is a sectionalview -taken along the Figure 4 is a perspective-wievc-of-porti'ons of two overlapping bone plates.

Iii theembodiment seleeted iot illhstratingthe drawing illustrates two overlapping bone plates l secured to the fractured femur 42 by means of screws M. The plates I5 are identical. Our bone plate is made of austenitic (hardened by cold working) stainless steel. The non-corrosive alloy prefer-ably contains eight per cent of nickel and eighteen per cent of chromium. The bone plate is 20 cm. in length, 1.4 cm. in width and 0.4 cm. in thickness. A series of slots It for the screws I4 is provided along the longitudinal medial line of the plate, which slots are 1 cm. in length with widths slightly larger than the 6-32 or 6-20 machine screw. The slots are spaced 1 cm. apart.

The two marginal side edges of the plate are deformed to provide V-shaped contours l8 wherein the outside flanges 20 are considerably wider than the inside flanges 22 so as to bring the flanges 20 into bone engagement with the body of the plate spaced from the bone.

In operation, the plate may be cut at the operating table to the desired length. If necessary, the plate may then be molded or contoured to the bone contour through the aid of pliers. While an assistant approximates the fragments with bone-holding forceps, the plate is applied to the exposed bone, and holes (#36 drill) are drilled in the middle of the slots l6, through both cortices, and the screws inserted. The screws M are of the fluted type, which renders the screws self-tapping.

The longitudinal slots l6 are characterized by many advantages over the conventional round or countersunk screw holes. The fracture need not be in apposition when the plate is applied. The ends of the fracture may be more than one quarter inch apart. The screws are sunk to light contact with the plate, pressure is then applied above and below on the fractured member, the fracture thereby being accurately reduced. The screws are then tightened. After muscle tone has been restored postoperatively, the pull only 5.4% The =plate f isxtcorrugated longitudinally [to the":

contour 'ofi-ia :mo'difiedeMr-in crossrarsectionywhich allows maximum strength inia. plate of relatively thin auge metalsii The corrugated" cross section is of uch contourcasito iallowon-ly the -two outer" a flan es:.-.-to comexinanwntact with: .the 1 bone, thus havingrelativelysmall b'one contact;:.which allows tends to furthers reduce: thearlfra'ctured-r surfaces promoting quichenhealingn Plastermasts-areeune' nece-ssary,- light-suspension: or;traction-- beingused "A for a short-period, tor walkingcalipers:

new bone to form unclercthearbody of the plate: Tli'e corrugated contour ofrthetplate wheri, ap-

plied te th convexisurface of theszboneyatends to:

maintain the original longitudinal axis of the fractured bone fragments. The plate action prevents lateral stresses on the shafts of the screws used to hold the plate, which helps to prevent loosening of the screws. Figures 1 and 2 illustrate two stacked plates, such stacking being desirable in connection with femurs, large humeri and tibiae. For double fractures of the femur, tibia or humerus, i. e., where fractures involve the upper third and lower third of the bone, thereby producin a free fragment, the plates may be overlapped and staggered end-wise to maintain a continuous metal truss. In connection with conventional plates, this type of fracture necessitates two plates without continuous metal bridging. The corrugated contour allows the plates to be stacked or nested for additional strength as needed. Such stacking of the plates provides a leaf spring action, which counteracts sudden stresses in the fractured member, caused by sudden muscle contracture or spasm, falling of the patient, or undue early weight bearing of the patient. Because of the overlapping coaction of nested plates, one or more free fragments of bone may be completely bridged with a metal truss. The thin gauge of the plate allows it to be cut at the time of the operation, when the exact length has been decided upon. Thus many plates of diiferent lengths are not required as is necessary with the conventional bone plates.

' The plate is easily bent to the longitudinal contour of the bone, even to right angles, without danger of breaking the plate. This is done at the time of the operation with the field exposed.

The slots through which the screws l4 pass allow the muscle pull to more closely approximate the fracture surfaces. In connection with conventional plates, the cortex on the plate side is often held apart while the opposite cortex is closely approximated, thus permitting undue strain on the plate. Whether the plates are used singly or in nested relationship, the cross sectional end contour and the slotted feature function in the same manner. The combined strength of the two plates is greater than two individual plates because of the leaf spring action. The fluted end of the screw M has an eccentric point formation and the fluted formation extends a considerable distance longitudinally of the screw. Such a screw allows a smaller hole to be used in the bone with greater holding power, and with about forty percent greater tapping ease.

Without further elaboration, the foregoing will so fully illustrate our invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

We claim;

1. A combination brace for fractured bones comprising a plurality of comparatively thin elongated plates in laminated relation providing a leaf spring-like brace, each of said plates having the same shape in cross section providing nesting thereof, and each of said plates having a centrally disposed flat web with inverted V-shape flanges at the edges and with the outer legs of said V-shape flanges longer than the inner legs providing means spacing the centrally disposed Web from a plane across the outer edges of the outer legs of the flanges, said centrally disposed webs having spaced elongated centrally positioned screw receiving slots therein adapted to register with the plates nested with the ends aligned and also with the plates staggered.

2. A connecting plate for fractured bones comprising an elongated strip of material having spaced slots therein extending continuously throughout the length thereof, and in which the said strip, in cross section, comprises a flat intermediate area in which. the slots are positioned, with the sides of the strip at the edges of the flat area extending upwardly and then downwardly assuming V-shapes with the extreme edges positioned below the plane of the said flat area thereby spacing the flat area from a plane corresponding with the said extreme edges providing a springy gripping action of the said plate with a bone on which it may be secured by screws through the said slots.

KENNETH TOWNSEND.

CHARLES W. GILFILLAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,018,452 Slaughter Feb. 27, 1912 1,025,008 Miner Apr. 30, 1912 1,105,105 Sherman July 28, 1914 2,133,859 Hawley Oct. 18, 1938 FOREIGN PATENTS Number Country Date 19,736 Great Britain Sept. 9, 1902 OTHER REFERENCES Bickhams Operative Surgery, 1924, vol. 2, pp. 362 and 369.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US1018452 *10 May 191027 Feb 1912Samuel G SlaughterEmergency package and splint.
US1025008 *7 Ago 191130 Abr 1912Lucien Luttrell MinerBrace for fractured bones.
US1105105 *10 Feb 191228 Jul 1914William O'n ShermanSurgical appliance.
US2133859 *31 Mar 193818 Oct 1938Louis J PadulaBone setting
GB190219736A * Título no disponible
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US2486303 *29 Abr 194825 Oct 1949Harry Herschel LeiterSurgical appliance for bone fractures
US2780223 *17 May 19555 Feb 1957Haggland Paul BFracture plate
US3716050 *11 Feb 197113 Feb 1973F JohnstonOlecranon plate
US5129903 *9 Jun 198914 Jul 1992Luhr Hans GeorgBone plate
US5735850 *30 Ene 19967 Abr 1998Sulzer Medizinaltechnik AgFastening system for pedicel screws
US5951557 *30 Dic 199714 Sep 1999Luter; Dennis W.Bone plate
US6001099 *8 Jun 199814 Dic 1999Huebner; Randall J.Bone plate with varying rigidity
US6280445 *15 Mar 200028 Ago 2001Sdgi Holdings, Inc.Multi-axial bone anchor system
US630613627 Jul 199823 Oct 2001Dimso (Distribution Medicales Du Sud-Ouest)Implant, in particular front cervical plate
US6350265 *13 Ene 200026 Feb 2002Walter Lorenz Surgical, Inc.Cover for plate for mandibular osteosynthesis
US6602256 *10 Oct 20005 Ago 2003Cross Medical Products, Inc.Bone stabilization plate with a secured-locking mechanism for cervical fixation
US672309812 Mar 200220 Abr 2004Mrugesh K. ShahBone fixation plate having clip members
US709067619 Nov 200315 Ago 2006Acumed LlcAdjustable bone plates
US715330919 Nov 200326 Dic 2006Acumed LlcGuide system for bone-repair devices
US718923719 Nov 200313 Mar 2007Acumed LlcDeformable bone plates
US722944521 Jun 200412 Jun 2007Synthes (Usa)Bone plate with bladed portion
US732621219 Nov 20035 Feb 2008Acumed LlcBone plates with reference marks
US753759621 Jun 200426 May 2009Acumed LlcBone plates with intraoperatively tapped apertures
US753760322 Jul 200326 May 2009Acumed LlcBone fusion system
US753760419 Nov 200326 May 2009Acumed LlcBone plates with slots
US757882519 Abr 200525 Ago 2009Acumed LlcPlacement of fasteners into bone
US760809610 Mar 200327 Oct 2009Warsaw Orthopedic, Inc.Posterior pedicle screw and plate system and methods
US763536527 Ago 200422 Dic 2009Ellis Thomas JBone plates
US769550116 Jun 200613 Abr 2010Ellis Thomas JBone fixation system
US770425114 Ago 200627 Abr 2010Acumed LlcAdjustable bone plates
US771794511 Dic 200618 May 2010Acumed LlcOrthopedic systems
US772726523 May 20051 Jun 2010Paul Kamaljit SBone support plate assembly
US774063425 Jul 200622 Jun 2010Depuy Products, Inc.Method of bone plate shaping
US777143320 Mar 200610 Ago 2010Depuy Products, Inc.Bone fracture fixation plate shaping system
US784203727 Sep 200630 Nov 2010Dupuy Products, Inc.Flexible bone fixation device
US793512625 Jul 20063 May 2011Depuy Products, Inc.Bone plate shaping system
US795117611 May 200431 May 2011Synthes Usa, LlcBone plate
US8016864 *11 Abr 200713 Sep 2011Warsaw Orthopedic, Inc.Anterior implant for the spine
US811408013 Sep 200714 Feb 2012Depuy Products, Inc.Flexible bone fixation device
US816791929 Jun 20091 May 2012Warsaw Orthopedic, Inc.System and method for securing a plate to the spinal column
US817288614 Dic 20048 May 2012Depuy Products, Inc.Bone plate with pre-assembled drill guide tips
US81778199 Ago 201015 May 2012Acumed LlcExpanded fixation of bones
US82413389 Ago 201114 Ago 2012Biomet C.V.Bone plate with pre-assembled drill guide tips
US824666424 Feb 200921 Ago 2012Osteomed LlcMultiple bone fusion plate
US834319624 Feb 20061 Ene 2013Synthes Usa, LlcBone plate
US8398637 *5 Oct 200719 Mar 2013Douglas Eric ParsellDevice and method for less invasive surgical stabilization of pelvic fractures
US842557416 Feb 201123 Abr 2013Acumed, LlcBone fixation with a bone plate attached to a fastener assembly
US852960828 Abr 200910 Sep 2013Osteomed LlcBone plate with a transfixation screw hole
US854554023 Dic 20101 Oct 2013Biomet C.V.Bone plate with pre-assembled drill guide tips
US856841720 Sep 201029 Oct 2013Charles River Engineering Solutions And Technologies, LlcArticulating tool and methods of using
US8574268 *9 Ene 20085 Nov 2013DePuy Synthes Product, LLCHighly-versatile variable-angle bone plate system
US863257313 Abr 201021 Ene 2014Thomas J. EllisBone fixation system
US875834614 Sep 201024 Jun 2014DePuy Synthes Products, LLCVariable angle compression plate
US20110270311 *9 May 20113 Nov 2011Warsaw Orthopedic, Inc.Anterior implant for the spine
DE8808123U1 *24 Jun 198822 Sep 1988Herzberg, Wolfgang, Dr. Med., 2000 Wedel, DeTítulo no disponible
EP0024635A1 *13 Ago 198011 Mar 1981Ulrich MennenInternal fixation device for bone fractures
EP1905368A1 *25 Sep 20072 Abr 2008DePuy Products, Inc.Flexible bone fixation device
WO1999004718A1 *27 Jul 19984 Feb 1999Dimso SaImplant, in particular front cervical plate
WO2013140191A1 *14 Nov 201226 Sep 2013Sanatmetal Korlátolt Felelösségü TásaságFixation device for joining bone pieces
Clasificaciones
Clasificación de EE.UU.606/71
Clasificación internacionalA61B17/80, A61B17/68
Clasificación cooperativaA61B17/80
Clasificación europeaA61B17/80