DPT showing impacted upper right second premolar directly above upper right permanent first molar and developmental absence of LL5.

Finally, our results showed that a retained deciduous predecessor was linked to a less severe vertical impaction of the mandibular second premolar (P = 0.030) and horizontal impaction of the ...

The combined width of the primary canine, first molar, and second molar is greater than the total width of permanent canine, first premolar, and second premolar tooth.

Other variations include a greater palatine nerve—rather than maxillary nerve—that services the upper molar and premolar teeth.