. Physiology, experimental and descriptive . e thus: exposed, naming theparts. The Kinds of Teeth and their Arrangement. — Begin-ning at the middle of the front of the mouth, there are (inthe normal adult) eight teeth in each half-jaw : two Incisors,one Canine, two Bicuspids (or Premolars), and three Molars. The kinds and arrangement of teeth are often expressedby a Dental Formula, in which the numerators indicate theupper jaw and the denominators the lower, thus : If, C\,PMf, M| (for one side of the head). The crown of an incisor is chisel-shaped ; but the root isflattened in the opposite dir
. Physiology, experimental and descriptive . e thus: exposed, naming theparts. The Kinds of Teeth and their Arrangement. — Begin-ning at the middle of the front of the mouth, there are (inthe normal adult) eight teeth in each half-jaw : two Incisors,one Canine, two Bicuspids (or Premolars), and three Molars. The kinds and arrangement of teeth are often expressedby a Dental Formula, in which the numerators indicate theupper jaw and the denominators the lower, thus : If, C\,PMf, M| (for one side of the head). The crown of an incisor is chisel-shaped ; but the root isflattened in the opposite direction, ,-at right angles to thejaw, instead of parallel to it, as is the case with the possible, have at hand also a skull from which the teethhave been extracted, in order to see the cavities into whichthe teeth fitted. KINDS OF TEETH. 201 The canine tooth has a conical crown, and a longer rootthan the incisor. The bicuspid has two points. The molar has a cuboidal crown, and usually two or threeroots. KINDS OF TEETHIncisors. TIME OF APPEARANCE7th Month9th 18th 12th 24th TEMPORARY SETUpper
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