Which of the following teeth does not complete its root by dental age 11?

The maxillary canines are known for their relatively late root development compared to other teeth. By dental age 11, the roots of the maxillary canines typically have not yet fully formed. The completion of the root for these teeth usually continues into the teenage years, often finishing between the ages of 12 to 14.

In contrast, the maxillary incisors, mandibular incisors, and mandibular first molars typically have completed their root formation by the age of 11. The maxillary incisors generally have roots that complete around age 10 or 11, while the mandibular incisors often finish by approximately age 9 or 10. The mandibular first molars complete their roots around age 9 to 10 as well. This timing is associated with their position in the dental arch and the sequence of eruption.

Therefore, the maxillary canines are identified as the teeth that do not complete their root development by dental age 11, distinguishing them from the other options that reach completion sooner.