A 7-year-old boy with autism, terrified of the dentist’s chair, summoned the bravery to open his mouth wide thanks to his loyal service dog who had her teeth checked first. Mom Nicole Duggan of Cork in Ireland shared about Riley’s first visit to the dentist in a social media post. To say that her little boy was just anxious was an “understatement,” she wrote. From the second he walked into the clinic, Riley’s mantra was, “I’m not getting my teeth checked.” Duggan said he kept repeating this over and over until they went into the dentist’s room. Riley then refused to sit in the dentist’s chair, choosing instead a chair by the door beside his dog, Willow. The pup kept Riley calm and distracted until the family had a smart idea. “We got the dentist to check Willow’s teeth first,” Duggan said. “He watched and saw that no one had to go at her …