Stimulating applications are more useful; for, as they act more slowly, they produce a greater influence on the action.
The cuprum vitriolatum, mixed with simple ointment, in the proportion of a drachm to the ounce, is frequently serviceable; but the ung. hyd. nit. is still more useful. One drachm of this may be mixed with an ounce of hog’s lard and a scruple of camphor. Red precipitate, mixed with resinous ointment, is also often of service.
The application of powdered rheubarb is recommended by Mr. Home, and is frequently of service.
Lotions of port wine, solutions of white vitriol, or rose water, containing as many drops of l’eau mercurielle[61] as will make it moderately pungent, may be usefully applied before the dressing.
Poultices seem to increase the diseased state; and mild dressings do not counteract it, but allow it to go on.
The second variety is only to be cured by removing the caries bone; but the same remedies which are used in the first variety may be employed here, as palliatives, or the means of preventing the ulcer from becoming worse. By a continuance of these applications, in cases of slight caries, a cure may, after some time, be obtained; for the thin layer of diseased bone, either comes away in fragments through an opening in the ulcer[62], or it is sometimes absorbed. This last event, the absorption of the bone, is particularly induced by pressure, applied by means of the adhesive plaster; and, therefore, where the disease is not extensive, it is always proper to have recourse to this; but if, upon trial, we find it to fail, or to convert the sore into the second species of this genus, which it sometimes does, we must omit it.
As it is only in slight cases of caries that absorption of the bone is to be expected, we may consider it as necessary, in general, as a preparatory step toward healing, that the diseased portion of the bone be separated, and come away externally. It is therefore of advantage to endeavour to accelerate this; because, whatever does so, hastens the cure. Our attempts, with this view, are made at two different stages, and with different intentions. First, when the bone has separated, or exfoliated from the part below, by making an incision through the ulcerated surface, we remove the dead part, and allow the sore to heal. This stage may be discovered, by pushing a probe through the opening, if there be one, or through the granulations, down to the layer of bone, which we find to be elastic when we press on it. But, even although the incision be made before this stage has taken place, no harm is done, because it is of use in the first stage. Second, when the carious bone has not yet exfoliated, but remains in contact with the rest of the bone, ulceration of the sound part not having yet taken place, it will be useful to make an incision down to the bone, and, as soon as the bleeding stops, or lessens, to apply caustic freely, in the whole course of the incision, so as to act upon the caries, or rough portion; or we may use the trephine, or other remedies, which have been formerly mentioned. It sometimes happens, that the soft parts are, at particular portions, and often to a considerable extent, removed by absorption, and the bone, at these parts, is left bare. In this case, no incision is necessary, except occasionally through some bands of granulations which extend across the bare bone; and, therefore, we can at once apply our remedies to the bone, or make perforation with the trephine.
The second species requires to be treated differently, according to its varieties.