802 
DISEASES OF THE FOOT. 
This treatment is continued until the defect appears completely filled 
up, and the coronary band is adherent to the underlying tissues 
throughout its entire length, i.e., until the space between the divided 
coronary band and its foundation is completely obliterated. A tar 
dressing is then applied, the wound surface being smeared with tar, and 
a bandage saturated with the same material wound round the hoof. If 
pain be slight, a bar-shoe can be put on, and the horse sent to slow 
work. The time occupied up to this point is from three to six weeks, 
so that, as a rule, operation considerably shortens the duration of the 
disease. Siedamgrotzky’s cases, on an average, occupied thirty-one 
days in healing. 
The popular idea that the operation renders horses useless for work 
on hard roads appears, after a large number of observations, to be 
without foundation. Many carriage-horses on which Moller operated 
recovered so perfectly that not the slightest trace of operation could be 
detected on examining the hoof; and the animals themselves worked for 
years on the streets of Berlin. 
Bayer has modified the above operation with the view of producing 
fewer and simpler incisions, facilitating the escape of discharge, and 
enabling the operator clearly to see each stage in the removal of the 
lateral cartilage. 
On the day before casting the horn covering the seat of operation 
is thoroughly thinned, the parts are freely scrubbed with a brush and 
disinfecting solution, and thereafter enveloped in several thicknesses of 
linen saturated with a strong disinfectant. 
I he horse is cast and the foot secured as previously described. 
General anesthesia is desirable, but if local anesthesia is preferred 
cocain solution must be injected at several points around the coronet, 
and operation must be carried out more quickly than when chloroform 
is given. The hair is shaved from around the coronet and over the 
fetlock, and an Esmarch’s bandage and tourniquet applied to the limb. 
(For details see Dollar’s “ Operative Technique,” p. 168.) The horn is 
then completely removed from the crescent-shaped surface beneath 
which lies the lateral cartilage (see fig. 308). Instead of now lifting the 
coronary band, &c., from the surface of the lateral cartilage, Bayer 
makes an incision through the sensitive structures, corresponding with, 
but about J inch within, the incision through the horn. The ends of 
this incision are prolonged upwards, dividing the coronary band, Ac., as 
high as the upper margin of the lateral cartilage. The flap so outlined 
must now be carefully freed from the underlying lateral cartilage, which 
is next removed either wholly or in part, depending on the extent to 
which it is diseased. Sometimes the gouge or the chisel and mallet 
must be used to extirpate ossified portions of the cartilage. In the 
