The intercanine width in the mandible is completed by:

 # The intercanine width in the mandible is completed by:

A. 4 to 5 years

B. 7 to 8 years

C. 9 to 10 years

D. 10 to 12 years

The correct answer is C. 9 to 10 years.

The intercanine width in the mandible is typically completed by the time a child is 9 to 10 years old, which is when the mandibular canine teeth have fully erupted and have reached their final position in the arch. This timing can vary slightly between individuals, and it is important to consider other factors such as dental crowding or spacing when evaluating intercanine width.

The reference for this explanation is: Naini FB. Biological basis of orthodontics. John Wiley & Sons; 2015. Chapter 5: Growth and development of the mandible.