The largest and longest root canal of the maxillary second molar is the lingual

Maxillary lateral incisor agenesis:
This is the most common congenital absence of a permanent tooth in the maxillary anterior region, accounting for about 20% of all dental anomalies.

Coronal developmental invagination (DI):This is a common anomaly in the permanent maxillary lateral incisor, usually appearing as an accentuation of the lingual pit.It's often bilateral.

Peg-shaped crown:This is a common alteration in the maxillary lateral incisor.

lateral incisor is most often missing congenitally

The primary teeth begin to form in utero at about six weeks. Hard tissue formation occurs in all primary teeth by the 18th week in utero. 3. The permanent teeth begin to develop at approximately four months of age in utero. Maxillary and mandibular first molars begin to calcify at birth.

madibular first molar normally have 3 root canals