EQUINE VETERINARY EDUCATION / AE / AUGUST 2020


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a)


b)


Fig 3: a) The extensor moment about the DIPJ can be moved further palmarly in a wooden shoe when compared with a conventional horseshoe (Image courtesy of Andrew Parks). b) This Illustrates how the tilt (breakover) can be increased when a bevel is created in two pieces of wood of different thicknesses. Note the increased breakover in the thicker block.


Fig 4: This illustrates the bevel in the wooden shoe that shifts the GRF axially which decreases the moment about the DIPJ and enhances breakover in a mediolateral direction (Image courtesy of Andrew Parks).


be fabricated according to the conformation of the foot, the integrity of the structures and the radiographs. The wooden shoe can be constructed using any steel or aluminum shoe


with a broad toe that is available in sizes 00–5 as a template.2 The basic shoe is made from two pieces of plywood. One piece of plywood is 6.3–9.5 mm (1/4–3/8 in) thick (depending on the thickness of the shoe required) and the second piece is 19 mm (3/4 in) thick. Using the aluminum shoe as a template, the thinner piece of plywood is cut out with a vertical border while the thicker piece is cut out with the border straight or beveled at a 30-degree angle across the palmar or heel section and a 45-degree angle around the perimeter of the block using an angle saw3 (Fig 5a). The straight or decreased angle across the palmar section of the shoe prevents rocking backwards during landing. The two pieces of plywood are glued together with the thinner portion proximal and then two 1-inch drywall screws or wood screws are inserted on the ground surface of the shoe for additional security. A wood rasp or belt sander is used to blend the cut angles into a uniform smooth slope. Plywood can also be purchased in a solid 45 mm (1.8 in) thickness which eliminates the necessity to cut two pieces. Alternatively, the wooden shoe is available commercially and can be easily modified with a belt sander or a hoof rasp to match the wooden shoe that was described above3 (Fig 5b). Shoe height is dictated by the conformation of the hoof and the amount of displacement of the distal phalanx present, that is, the greater the rotation of the distal phalanx, the more shoe height is necessary in order to achieve the appropriate palmar placement of breakover. If the sole is prolapsed or the distal phalanx has penetrated the sole, a recess can be created in the dorsal foot surface of the shoe by cutting a half moon shape in the thinner piece of plywood using a router or a hand grinder to create a trough


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