What parents should pay attention to

- of notable rank  of facial asymmetry
- too fast loss of milk teeth
- asymmetrical eruption of permanent teeth
- very much protruding upper front teeth 
 - reverse occurring of the front teeth or side (the upper teeth "to the centre" than bottom)
- little chin very much sticking out or moved back
- vertical slit between the upper teeth and bottom (often at the suction of the finger or pushing  the tongue between teeth)