 Slow lorises have relatively large maxillary canine teeth , their inner ( mesial ) maxillary incisors are larger than the outer ( distal ) maxillary incisors , and they have a diastema ( gap ) between the canine and the first premolar . The first mandibular premolar is elongated , and the last molar has three cusps on the crown , the shortest of which is near the back . The bony palate ( roof of the mouth ) only goes as far back as the second molar . 
