Which of the following patients should be referred for orthodontic treatment to close a diastema between maxillary central incisors? 1. An 8-year old with no abnormal oral habits. 2. A 14-year old with no abnormal oral habits. 3. A 3-year old with a 4mm overjet. 4. An 8-year old with a previous thumb habit.
(2) and (4)
(1) (2) (3)
(1) and (3)
(4) only
All of the above.
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