Horse teeth age will have between 36 and 44 teeth. All equines are heterodontous, which means that they have different shaped teeth for different purposes. All horses have twelve incisors at the front of the mouth, used primarily for cutting food, most often grass, whilst grazing. They are also used as part of a horse's attack or defence against predators, or as part of establishing social hierarchy within the herd. Immediately behind the front incisors is the interdental space, where no teeth grow from the gums. This is where the bit is placed, if used, when horses are ridden. Behind the interdental
Teeth (song) "Music Times" said Teddy Riley's work on "Teeth" was his only contribution to "The Fame Monster" and called the track the EP's "smallest". "Teeth" received a mixed reception from critics; some complimented the song and others called it the album's worst track. Gaga's vocals was compared to those of Christina Aguilera. "Slant Magazine" Sal Cinquemani said the song "sounds like something from Michael Jackson's last studio album as sung by Christina Aguilera ... that the closest she gets to another human being involves being tied up and bitten is revealing." Blogcritics' Clayton Perry said "Teeth", along with the tracks "Monster"