“…Papers included in this review investigated several staining liquids. Coffee was used in most studies ( n = 16), 13,14,28,50–52,54–60,62–64 followed by coke ( n = 6), 14,54,59,61,64,65 red wine ( n = 5), 13,14,54,59,64 tea ( n = 4), 51,54,55,58 orange juice ( n = 3), 51,58,61 other juices ( n = 3), 51,55,62 and energy drinks ( n = 1) 65…”