A decoction of the root of the hyoscyamus in vinegar, used as a mouth wash, is another remedy recommended by Galen against the pains in the gums. It would also be of benefit to apply on the inflamed gums a powder composed of one part of salt to four of alum, afterward washing the mouth with wine or with a decoction of olive leaves. If the gums are ulcerated, Galen recommends them to be cauterized with boiling oil, using for the purpose a little wool wrapped around a probe or toothpick. This medicament, says Galen, greatly modifies the diseased part, exciting a reparative process in it, to aid which, however, suitable remedies must be used, and especially frictions with a mixture of gall-nuts and myrrh reduced to a fine powder. For the cure of epulides the application of green vitrol, together with an equal quantity of powdered myrtle and a little alum, is especially recommended. In dentition, if the gums are painful, it is advisable to rub them with the milk of a bitch. The teeth, moreover, appear very readily, says Galen, if the gums be rubbed with hare’s brain. Against odontalgia, properly so called, independent, that is, of diseases of the gums, Galen particularly recommends warm applications, either on the cheek or directly on the tooth. Externally, on the side of the pain, may be applied dirty (!) pieces of linen, well warmed, or else small bags full of roasted salt, or cataplasms of linseed or barley flour. But if it is desired to act directly upon the sick tooth, this may be rubbed with a branch of origanum (wild marjoram) dipped in hot oil, or else, after applying a bit of wax on the tooth, the heated end of a probe may be laid upon it; or lastly, fumigations may be made by burning the seeds of the hyoscyamus. In case the above remedies, or others like them, be found of no use, Galen recommends them to be adopted anew after having perforated the sick tooth by means of a small drill. But if even from this no benefit be derived, and it is considered well to remove the tooth, this can be done without pain by the application of special medicaments. Among these the root of pyrethrum kept in very strong vinegar for forty days and then pounded takes the first place. The remedy is applied after having well cleaned the sick tooth, and after having covered the others with wax. At the end of an hour the tooth will have already become so loose that it can be drawn out with the fingers or with the mere help of a style. The same effect may be obtained, says Galen, by the application of blue vitriol mixed with very strong vinegar. To prevent a carious tooth from producing pain or fetor, he advises the carious hollow to be filled up with black veratrum mixed to a paste with honey.