According to the experts at Colgate, your child should have his first dentist appointment by his first birthday. Indeed, studies have shown an increased occurrence of cavities in preschool-aged children. Taking your child to the dentist within six months of getting his first tooth will allow your dental professional to assess his cavity risk and explain the best ways to prevent tooth decay. It will also get your child used to going to the dentist; thus, minimizing potential fear in the future.