IL29586A - Extra cortical clamp - Google Patents

Description

EXTRA CORTICAL CLAMP Arnold Sampson This invention relates to a new useful device for open reduction and internal fixation of fractures of long Moro the invention relates to a ing device specifically adapted to the internal fixation of fractures of bones by and wherein the device implant which is used to reduce and position the is in and is the structure which obtains and maintains internal fixation at the fracture Internal fixation of long fractures has been practiced for the the advent of improved and antibiotics use inevitably will Among the methods and apparatus conventionally used are screw plate screw Band in and nail fixation and compression instrumentation in conjunction with bone plate and screw Rone of the previously Mentioned s have been wholly and each has certain inherent th all of the prior arts each nethod can only be used for certain types of and Band fixation can only be for oblique or spiral are ineffective for verse and comminuted pins and and bone plates and screws an coapreasion tation devices are effective for transverse less effective for oblique or spiral f and useless A objection is with the prior Methods that because the nature of these techniques high degree of surgical skill is required to effectively and position these internal fixation In a holding device such as a Loaaa be utilised until the definitive internal fixation device is positioned on the fracture Not to improper or inadequate positioning of the definitive fi ation the Claap is the good reduction is lest and the procedure be A objection that stoat of the prior art extensive dissection soft tissue structures and periosteum and vide exposure of the fracture site is operation tine these factors the possibility of wound tis and of The herein disclosed obviates the difficulties inherent the prior art and provides an internal fixation store uickly and effectively positions and fracture site and is effective for all types of fract Another object of this invention is to avoid disadvantages in the prior art of internal fixation by providing a ing device for holding the bone ments in positive and preventing any vhether or and placing undue pressure upon the hone another object of invention to provide a eortical clamp for internal fixation of the fractures of long such as the Still another object of this is to provide ing device which readil applied by any even orthopedic background and which is of two separable one is a tool useful in tightening the implant head or about the bone about which the object invention is to provide a cortical which reduction of a and can be applied vith soft and especially the A further object this invention in the ef a nev type of n device reducing fractures which will ia obviate the necessity for and which insure good apposition the and fixation thereof to such a degree the patient many use the fractured ia the usual the are in the process An object of this invention is provide a novel cortical arrasftgeroent is ef generally has a ef and is safe and efficient in use and which requires a of The above and other objects and features of the invention will more apparent from a consideration of lowing An device in accordance with the present invention comprises in an implant head having a pair of opposed jaws adapted to be moved relative to each other about a fractured on said jaws to lock the same in a selected position of an installation and tensioning tool having a pair of frame means removably interconnecting one of said frame members to one of said implant bead jaws for movement means on the other of said members removably in contact with the other of said implant head jaws to restrain the and mechanical force transmission means for moving one of said frawe members with respect to the other so that the implant head jaw associated therewith will be with respect the other implant head jaw when the same are In order that the general of this invention amy be readily reference should be had to the following detailed description taken in conjunction with the accompanying drawings which illustrate the best nsode now templated by me for carrying out toy invention 1 is a perspective view showing the implant head and installation tensioning tool assembled about a fractured Figure 2 is a perspective view similar to Figure but showing the nt head and installation and tensioning tool shoving the bone sections in proper anatomical position Figure 3 is a perspective similar to Figure but shoving the installation and tensioning tool withdrawn from the implant Figure 4 is a bottom plan of the implant head joined to installation and tensioning tool the operating knob cut Figure 5 is a vertical sectional taken along the lines of Figure Figure 6 is a section taken along lines of Figure Figure 7 is section taken along lines of Figure 8 is a sectional view lines of Figure but implant head separated from the installation and tensioning tool shoving spring in their o Figure 9 is perspective of a modified of implant Reference is now specifically to the like reference similar parts throughout the several and vhereia the cortical clamp assembly constituting the matter of this invention is designated generally at The cortical tvo component structures the generally at 11 d the installation and tensioning tool The cortical p is preferably fabricated in or in part from a controlled low carbon content stainless steel such as or This material say be precision olished and It should be that any conventional desired may be in the construction of the cortical 11 comprises a frame jaw 13 which serves the stationary of the This jav has a curved face as shown at 14 which extends upwardly at a right angle to the base portion of the jav and curves back at its upper The curved face is of a width considerably greater the base portion of the and the end face is provided preferably with a plurality of apertures The inner surface of curved end face is with a plurality of bone engaging projections shown spaced in two these projections are preferably in Figure although other shapes be The base of frame jaw is bifurcated as shown at 17 for a later The upper face of each of the of the bifurcated portions are serrated at 18 to provide locking The side faces of the bifurcated portion of the are provided with tool locking holes 19 as shown in Figure 3 for cooperation with the locking device in the installation and tensioning tool 12 as hereinafter described in greater The botteai face of the base of the bifurcated jav has undercut flanges 20 These cooperate with a rectangular slide 21 as shown in Figure dating portion of the implant head consists of a trolley jaw 22 which in use is adapted to be moved into adjusted position vith respect to the jav The trolley jaw an integral base boss 23 having locking serrations 24 on the bo tom surface adapted to with the locking serrations 18 of the frane The end of the trolley jaw extends vertically it is bent inwardly adjacent its top edge and projections 26 are provided as shown in Figure for engagement with the A flat boss or horizontal bearing surface 27 provided at the top of the trolley jaw b and has a drilled recess therein for reception of the bolt Tool locking holes 29 are provided on each side of the trolley jaw base for cooperation with locking provided on the installation and tensioning tool 12 as hereinafter described of Figures 1 through 69 it will be apparent that the bolt 28 is loosened within the rectangular slide nut that the trolley jaw be with respect to the jaw so the locking serrations will ride over one anothe One the he d in its proper adjusted position such as about the bone portions B in Figure the bolt 28 may be tightened either by of a screwdriver or an Allen so the the trolley jaw are drawn together the slide nut 21 thereby tightly the locking serrations 18 preventing any further movement of the frame jaw trolley jaw with respect to each will be understood that the function of the co rtical arrangement is to tension the nt head about a bone the portions A and B are drawn together in proper fixation as shown in Figure Once the proper reduction has taken the locking bolt 28 may be applied so further of the jaws will be it will be understood that the implant is designed to n in about after reduction and about t e s bone or if at a later be removed during it vill be parent that the used for the heed must such to totally by body fluids tissues eve though exposed to the for prolonged periods of in order to properly install and tension the implant installation and tensioning tool 12 is This tool includes an elongated base 31 ted trolley superimposed thereon and adapted for movement with respect The bust frame 31 is to be connected to the Jaw of the implant the trolley adapted to be removably connected trolley of trolley me with respect to the will result in movement of the trolley with respect to the The frame includes a guide shown in Formed either therewith or separate thereto are the side which extend of the Figure It should be noted that the distance between the inner faces of the respective side is slightly than the outer width of the base of 13 to the bifurcated portions to be received between the side fraae apertures 35 of the same shape as the 19 the The bnse therefrom foraed interal therewith its end an end boss insufficientOCRQuality

Claims (1)

1. insufficientOCRQuality