The mesiodistal slope of the crown is thus formed.
Whether a tooth belongs to the upper or lower jaw is established from the shape of the crown and the shape and number of the roots. It is therefore necessary to know the shape and the number of roots not only of a definite group of teeth but also of each separate the given group.
The incisors (denies incisive), four on each jaw, have a crown shaped like a cutting chisel; they cut food to the needed size. The crown of the upper incisors is wide, twice Medical coding training india
