At the first appointment, the dentist told him he had seven cavities and told his wife she had two, despite her never having had a cavity before. Featured VideoThe couple reluctantly had his wife's cavities filled before scheduling his own appointment, he wrote. However, they grew skeptical once they saw the bill for filling seven cavities, prompting him to request a copy of his X-rays. The couple then canceled the appointment and found a new dentist, who found that he had no cavities at all. The X user wrote that the experience left him questioning how widespread undetected billing irregularities might be in dentistry.