Congenitally (primary) caused condylar hypoplasia leads to underdeveloped condyle at birth.
Congenital condylar hypoplasia happens when a person is born with smaller condyle than normal.
[2][3][4] Acquired condylar hypoplasia happens when a person is not born with a small condyle but they sustain an injury during their growth which leads to this condition.
[1][5][6] Individuals with condylar hypoplasia may present with small mandible, symmetry in lower jaw and increased overjet.
Depending on the presence or absence of the condyle, an individual may have limited opening of the mouth.