You wait, you peek, you might even poke. You get through some fitful nights with your unusually fussy baby ... and ta-da! That first teeny-tiny baby tooth appears. But once those little pearly whites ...

Nearly 80 years ago, Butler 3,7 described the morphogenetic gradient in mammalian postcanine teeth. From anterior to posterior, the deciduous premolars and molars increase in size, and in some species ...