Retrognathia

**Definition:** A physical misalignment of the upper (maxilla) and lower (mandibular) jaw bones in which either or both recede relative to the frontal plane of the forehead.

**Tree numbers:** - C05.500.460.827 - C05.660.207.540.460.827 - C07.320.440.827 - C07.320.610.827 - C07.650.500.460.827 - C16.131.621.207.540.460.827 - C16.131.850.500.460.827