The causes of this physical dysfunction are often hereditary. It mainly involves a malformation at the jaw level. It appears from birth and can worsen as the child grows. A retreating chin is characterized by significant development of the upper jaw or insufficient growth of the lower jaw. This can also be caused by a combination of both factors.
At the time of diagnosis, the professional must know the dental history of the patient’s family to determine if the cause of the retreating chin is related to a genetic predisposition. This malformation at the jaw level also results from bad habits acquired during childhood (chronic mouth breathing, thumb sucking, allergies, swallowing, deficient respiratory function, etc.).
