Патент USA US2406832код для вставки
Sept. 3, 1946. M. G. HARDINGE ~ 2,406,832 FRACTURE PLATE ' Filed March 5, 1945 INVEN TOR. ?/sevrw érxgqeowss, 2,406,832 Patented Sept. 3, 1946 UNITED STATES PATENT OFFICE 2,406,832 ' FRACTURE mire Mervy'n o. Hai‘dinge, Lon-1a Linda, use. A‘p'piacatib‘n Maren 5,1945, Serial No. 581,075 5 Claims. (01. 128;;87) 1 , 2 particular reference to a fracture plate which may with‘my fracture ‘plate in‘ place thereon; , “Fig.1 ‘2, is a fragmentary rear‘ elevational view be employed in the reduction of bone fractures‘, ‘ In the reduction of bone fractures, it has be come a practice to employ a metal plate extend line III-rm QfFig- 2-, ‘ ing along the length of the ‘bone and secured‘di rectly to the bone on opposite sides ‘of the frac ture by means of‘sc‘rews or other securing devices , Referring to the drawing, 1 have illustrated in Fig.‘ 1 apportion of thelength of a bone I frac-' tured along the line indicated at 2; the proximal plates is that while the plate will hold the bone of the fragments being placed in abutting relation My invention relates to ‘fracture plates and has of the fracture plate, shown in Fig, 1; and Fig. 3 is a transverse sectional view taken along “fragment 3 and the distal fragments having been extending into the bone structure. One of the accurately aligned iwithreac'h other and the ends 10 difficulties encountered in the use of such metal with each other, , To hold the bone fragments in fragments in alignment with each other and if properly placed will hold the adjacent fragment this position, I employ ‘a fracture‘ plate’ indicated more or less absorption takes place at the‘ line‘ of a inner and outer plateelement‘s, the strips being actually preventing healing unless the fracture rigid along their‘ lengths even though the strips then the fracture plate must be replaced with the bone fragments in the new position. nested strips, ?reside, flanges of, the outer strip 1 being bent‘ over aboutthe‘ side ?anges of the in~ ends in abutting relation with each other during - generally at ‘5, the fracture plate comprising a the healing process, it frequently occurs that 15 pair of ‘elongated metal strips '6 and 1, comprising preferably ‘deformed transversely in a general the fracture, resulting in a spacing of the frag channel-shaped crosssection, providing a pair of ment ends away from each other Under these side ?anges B and ‘9 interconnected by a web it conditions, the fracture plates heretofore" em ployed hold the bone fragment ends away from 20 which,‘ if desired‘, may‘ "be given a curved trans verse shape.‘ Thecurve of the web and the side each other, materially interfering with the rapid ?angesajct to render the plate elements 5 and ‘I healing at the fracture line and in some instances may be formed from relatively ‘thin material. plates are removed, the bone fragments again pressed into abutting relation with each other ‘and 25 _ Each fracture plate is preferably formed of two 'ner strip‘ 6‘ to‘ form‘ It is therefore an object of my invention to provide a fracture plate which, while‘ it will hold the bone fragments in accurate alignment‘ with each other, will automatically become shortened across the fracture line in the event any absorp~ tion at the fracture line takes place. or extending motion of the strips relative to each 01911811., ' ' Another object of my invention is to provide fragments tending to press the fragments toward each other will cause an automatic shortening of the plate across the fracture line.. Another object of my invention is to provide 45 a fracture plate of the character described‘wh‘ere in the fracture plate is yieldable longitudinally of the bone fragments to permit movement of the Other objects and advantages of my invention . s'crewsthroug'h the overlapping portions of the members‘? and] as‘, by forming elongated slots l2 and ‘twain the ‘plates land 6, respectively, the widthkof theslot‘ I21 being such as to permit the passage of thejhlead‘ ‘ofa screw ls while the slot [2d is‘ formed of a width which will permit the passage er thes‘crew but not, the head. ‘ Thus, “the nature ‘plate when placed upon’ the bone may beel‘ongated as trbyymojving thestrlps to an extended-‘position relative to each other to place the openings ‘12 and Lia on the inner and outer strips in such longitudinal relation to each bone fragments toward each other but is pre vented from elongation’ by forces tending tov move H , sides ‘Of the ‘fracture line 2, and I prefer to insert ‘ . g , of the strips 6 and ‘1,’ respectively, on opposite a fracture plate of the character described where in any force exerted longitudinally of the bone 40 the bone fragments apart. V, fracture‘ plate“ may be secured to the bone by_meansi“of_screws l‘jl, these screws extending through circular openings in the web it of each Another object of my invention is to provide a fracture plate of the character described wherein the fractureplate is adjustable in length while in place upon the bone. trackway along which the flanges of the, stripjG .rn'ay slide in a contracting ‘ 50 other that after the screws l3‘ are inserted, the strips may be moved in a contracting direction as the tone fragment‘ ends‘ are pressed into tight will be apparent from a study of the‘ following sentiment‘ with earn ctneranq the fracture plate speci?cations, read in connection with the accom will hold" -e" bones‘ aceurate alignment ‘with panying drawing, wherein Fig. l is‘a perspective view of a bone section 55 eac '‘ other, straining‘ thepati'ent to resume ac 2,406,832 3 tivity with assurance that the fragments will be held in such alignment. 4 pling said plates for telescopic movement relative to each other between an extended position and For example, if the fracture plate is used upon a contracted position, and means for resisting leg bones, the patient may be permitted to walk movement of said plates toward said extended po within a relatively short time of the setting of the Cl sition but permitting substantially free movement bone fragments and such weight as may be placed of said plates toward said contracted position. W upon the broken bone will cause the bone frag ment ends to be urged toward each other, insur 2. In a fracture plate to be secured to a pair of bone fragments and to extend across the fracture ing the tight abutment of the bone fragments line, a pair of plate elements extending in over throughout the healing period. Thus if any ab 10 lapping relation to each other, means intercou sorption of the bone structure occurs at the line pling said plates for telescopic movement relative of fracture during the healing process the bone to each other between an extended position and a, fragments will not be held in spaced relation to each other but will be permitted to move toward each other su?iciently to take up for any such absorption. . It is extremely desirable, however, that while the contracting movement of the plate strips may be permitted, means should be provided for pre venting extending movement or elongation of the plate strips across the fracture line. To accom plish this, I prefer to provide an over-riding clutch structure between the strips 6 and 1. As seen particularly in Figs. 2 and 3, the side ?ange contracted position, and means for resisting movement of said plates toward said extended position but permitting substantially free move ment of said plates toward said contracted posi tion, said last named means comprising an over riding clutch interposed between said plates. 3. In a fracture plate to be secured to a pair of bone fragments and to extend across the fracture line, a pair of plate elements, each formed as an elongated substantially channel shape, said plates being disposed in overlapping relation to each other, the flanges of the channel of one of said 9a of the inner strip 6 is partially cut away along 25 elements extending about and enclosing ?anges an angular line M to provide a space in the chan of the other of said elements to interconnect the two elements for telescopic movement between an extended position and a contracted position, and an over-riding clutch disposed between the ?anges the depth of the ?ange 9a. By placing the frac 30 of the two elements for resisting movement of the ture plate upon the bone with the inner strip 6 elements toward their extended position while uppermost, the disk [5 will always tend to ride permitting substantially free movement of said outwardly upon the angular surface M, effectively elements toward their contracted position. clamping the strips 6 and ‘I to each other against 4. In a fracture plate to be secured to a pair of elongation of the assemlbed strips while any tend bone fragments and to extend across the fracture ency of the strips to move toward the contracted line, a pair of plate elements, each formed as an position will be unresisted by the disk i 5. To aid elongated substantially channel shape, said plates in this clamping action and particularly to pre being disposed in overlapping relation to each vent any lost motion between the strips 6 and 1 other, the ?anges of the channel of one of said when any elongating force is exerted between 40 elements extending about and enclosing ?anges of them, I prefer to provide means for resiliently the other of said elements to interconnect the two urging the disk i5 toward its clamping position. elements for telescopic movement between an ex This may be done by providing a spring ?nger tended position and a contracted position, an an i6 extending along the channel formed by the gular surface formed upon the enclosed ?ange bent over ?ange 9 of the outer strip and, as illus of one of said elements, a disk disposed between trated in Fig. 2, such spring ?nger may be formed said surface and. the surrounding flange of the merely by cutting out a portion ll’ of the ?ange other element to comprise an over-riding clutch 9a, leaving a relatively thin ?nger of the metal permitting substantially free telescopic movement of the strip 6 bent as indicated at It to engage of said plates toward their contracted position but the disk [5. ' resisting movement of said plates toward their The metal of which the fracture plates’ are extended position. made is preferably steel or some material which 5. In a fracture plate to be secured to a pair of has inherent resilience and thus the ?nger [6 will bone fragments and to extend across the fracture resiliently urge the disk toward its clamping po line, a pair of plate elements, each formed as an sition. ’ elongated substantially channel shape, said plates It will thus be apparent that while the frac being disposed in overlapping relation to each ture plate is in place upon a pair of bone frag other, the ?anges of the channel of one of said ments, the exertion of forces longitudinally of elements extending about and enclosing ?anges of the bone fragments tending to move them toward the other of said elements to interconnect the two each other will permit a contracting movement 60 elements for telescopic movement between an ex of the assembled fracture plate while any force tended position and a contracted position, an an tending to separate the bone fragments will be gular surface formed upon the enclosed ?ange of effectively resisted by the action of the over one of said elements, a disk disposed between said riding clutch structure herein described. surface and the surrounding flange of the other While I have shown and described the preferred 65 element to comprise an over-riding clutch permit embodiment of my invention, I do not desire to ting substantially free telescopic movement of said be limited to any of the details of construction plates toward their contracted position but resist shown and described herein, except as de?ned in ing movement of said plates toward their extended the appended claims. position, and spring means normally urging said I claim: 70 disk along said angular surface toward a clamp 1. In a fracture plate to be secured to a pair of ing position between said surface and the enclos bone fragments and to extend across the fracture line, a pair of plate elements extending in over lapping relation to each other, means intercou nel de?ned by the bent over ?ange 9 of the outer strip and a small disk I5 is inserted in this space. The diameter of the disk is substantially equal to ing ?ange. . ~ - v a .. MERVYNV G. HARDINGE.