Our ancestors, unlike the birds, the cows, not spit. On the contrary, live bug was pushed into a bad tooth or squashed bug RUB their gums.
Thrifty healers winter kept the ladybugs in a perforated box with grass and earth, and homeopaths did the hood of 80 bugs in one ounce of alcohol. How well was shot toothache, in an ancient Tome, where I read, not written. There is no explanation for the therapeutic effect. Maybe you acted cantharidin?
In the past God cows escaped and measles. From red bugs, but most of the more "rakentaminen" beetles, blister beetles that inhabit steppes, did neravny patch. Professor P. I. M-rikowski in the book "Secrets of the insect world", writes that once the plaster of beetles had the effect of forty years after manufacture. Probably this stansty cantharidin must not only durable molecule, but the fact that it is easily crystallizes and is poorly soluble in water.