Fig.1.  Right-sided upper first molar (M1), 2nd molar (M2) and lower 2nd molar (L).  Length 10.81 mm refers to the width of upper first molar.  Normally the upper 2nd molar is behind the lower one (compare red lines).  Next or return to main article P

Xin Wei, DDS, PhD, MS 1st edition 05/23/2012, last revision 07/09/2020