The folk belief governing this practice is that when a new tooth grows in,it will possess the dental qualities,not of the original,lost tooth,but of whatever creature finds it,so the creatures of choice would be those world-class champers,the rodents.

• 这种习俗依据的民间观念认为，新牙长出来时不具有原先脱落的牙齿的特质，哪种动物发现了掉下来的牙，新牙就具有那种动物的牙的特质。因此，要选那些世界一流的擅长啃咬的动物，那些啮齿目动物。