After this period, teeth were rinsed in tap water during four hours and were dehydrated with ethyl alcohol at increasing concentrations of 80, 90 and 100% during twelve, two and three hours respectively.
Posteriormente se aclararon con agua corriente durante 4 horas y se deshidrataron con alcohol etílico a unas concentraciones crecientes del 80, 90 y 100 % durante doce, dos y tres horas respectivamente.