... carefully cleaned the teeth become encrusted with a sort of black enamel and the breath assumes a detestable odor. When used in small quantities and with proper toilet of the mouth, and this is the common practice among the Filipinos, buyo seems to be a very useful preservative of the teeth and a gingival and stomachic tonic. These properties are readily understood when we consider that the lime is antacid, the bonga astringent and tonic and the ... — The Medicinal Plants of the Philippines • T. H. Pardo de Tavera
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