CANINES
犬牙
These are the strongest teeth; their pointed shape makes them useful for shredding, cutting and tearing food. There are four: two on the top, two on the -bottom, on the side of the lateral incisors.
犬牙是最堅固的牙齒,錐形的構造讓磨牙在碾碎、切斷和撕裂食物方面“得心應手”,四顆犬牙上下平均分布,位于門牙的左右兩邊。
PROBLEMS: These contain more dentine to make them stronger so they are difficult to whiten.
問題:因為富含牙本質,所以犬牙也非常的堅固,但卻也非常難以達到潔白光亮的效果。