Because he had dental problems, presumably.
My son had 5 caps on his teeth at age 20 months. The enamel was weak or just not there.
Oh, ok, well that makes sense. Learned something new today :O)
“why is a toddler getting dental procedures?”
There are severals things that can cause that. Being put to bed with a bottle of milk all of the time, being given sugery drinks all of the time can do it, and many medications can also cause tooth decay young.