¿Por qué tengo los dientes amarillos aunque me los cepillo todos los días?
The problem of transforming yellow teeth into pearly whites has likely plagued humanity since our earliest civilizations. With their limited knowledge of the reasons for yellow teeth, our ancestors used treatments ranging from stale urine to ground-up animal parts to whiten their teeth. Fortunately, we now know more about what […]
¿Por qué tengo los dientes amarillos aunque me los cepillo todos los días? Leer Más "
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