. Manual of operative veterinary surgery. Veterinary surgery. 660 OPERATIONS ON THE FOOT. Goodwin also has invented a very ingenious, but too compli- cated shoe, composed of three articulated pieces. From the center of the median piece a prolongation of iron extends to the back of the frog, and is of sufficient thickness to be perforated, the hole having a thread through vi^hich a screvf is introduced, running on each side. The branches of the shoe have three nail-holes, and from the inner border of the heel rises a cHp so turned as to rest on the origin of the bar. The mechanism of the shoe i
. Manual of operative veterinary surgery. Veterinary surgery. 660 OPERATIONS ON THE FOOT. Goodwin also has invented a very ingenious, but too compli- cated shoe, composed of three articulated pieces. From the center of the median piece a prolongation of iron extends to the back of the frog, and is of sufficient thickness to be perforated, the hole having a thread through vi^hich a screvf is introduced, running on each side. The branches of the shoe have three nail-holes, and from the inner border of the heel rises a cHp so turned as to rest on the origin of the bar. The mechanism of the shoe is easy to understand, each branch being opened by the play of the screw which passes through the prolongation of the median piece, one extremity of which rests upon this prolongation, while the other presses upon the inner border of the movable branch. The Goodwin shoe has been es- sentially improved by Poures (Kg. 510). It is a bar shoe, the bar being thicker than the rest of the shoe, and vnder than the ordinary bar shoe. The bar is notched on each side, and through each notch runs a thread or vise which holds a mov- able clip, which is made to rest on the inside of the bars, and which are first properly thinned out. By a motion of the clip through the thread, the heels are slowly dilated Fig. 510.—Fourea' Shoe. by degree. This shoe, however, is very expensive, difficult to make, and easily put out of order. In all these methods of dilatation the shoe has to be made of several pieces, and in this condition is found a constant cause of weakness and of rapid deterioration, for which reason they are not very practicable. It is not so with the system used by De- fays, Sr., by which the shoe, besides containing the essential ele- ments of the Sesired mechanical dilatation, is left entire to fulfill the functions of the ordinary shoe, as well. That which charac- terizes Defays' method, who had used it in 1829, but which was made known only in later years, is that the shoe itself,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectveterin, bookyear1892
