SANDCRACK. 



177 



Peuch and Toussaint assert that if the injury is at the toe, the 

 crack opens when the foot is raised from the ground, and closes 

 when weio-ht is put on it; but that these actions are reversed 

 when it is at the quarter. Their view seems to be borne out by the 

 fact that the lameness of sandcrack at the toe is much more serious 

 than when the injury is at the quarter. 



Fig. 52. — Heart-shaped bar shoe. 



PRINCIPLES OF TREATMENT.— Sandcrack should be treated 

 according to the following principles: — (1) To prevent movement 

 between the edges of the crack, so as to stop its extension, and to 

 obviate the chance of the sensitive, underlying tissues becoming 

 pinched between the hard edges of the fissure; (2) to heal the 

 exposed tissues if they are in a wounded or inflamed state ; and (3) 

 to favour the downward growth of sound horn from above the crack ; 

 for, as the edges of the crack cannot reunite, we must look to the 

 growing down of the oraok as the only effective cure. The gravity 



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