Dental A 7-year-old has a 4-mm maxillary midline diastema. Which of the following should be done? A Brackets should be placed to close it. B A radiograph should be taken to rule out the presence of a supernumerary tooth. C Nothing should be done. It will close on its own. D Nothing should be done. Treatment should be deferred until the rest of the permanent dentition erupts. 💡 Explanation A 7-year-old has a 4-mm maxillary midline diastema. Which of the following should be done? ✓ Correct Answer: B. A radiograph should be taken to rule out the presence of a supernumerary tooth.