Upper Incisors. Click here. Lower Incisors. Click here. Lower Canine. These teeth have no function. Upper Canine, or Tush which grows tiny in mares but much larger in male horses.. Premolars & Molars are for chewing. Click here. Molars & Premolars are for chewing. Click here. Eye Socket. Molars are found only in adult horses. Premolars are found in horses of all ages. Diastema, or the bars of the mouth, space where the bit conveniently fits 'Sharp Teeth' can cause eating problems. Click here. Nasal Peak. Area of Sinuses.The Equine Skull !