Question

My aunt ____ a root canal done yesterday because her tooth was rotten.

Answer 1

Got is the answer

HOPE THIS HELPS YOU :-)

Answer 2

My mother got a root canal done yesterday because her tooth was rotten’. 

Root canal is the noun in the sentence. In order to describe the action, a verb has to be used. 

The past tense of the verb get i.e. got will be used here to impart sense to the whole context.