3.micrognathia

1. Micrognathia

2. General information Severely deficient jaw, which most commonly affects the mandible common to see individuals having a very small mandible

3. Types Apparent micrognathia - illusion of micrognathia true micrognathia - due to small jaw.... It can be congenital or acquired

4. Aetiology It is associated with other congenital abnormalities like congenital heart disease and Pierre Robinsons syndrome forceps delivery trauma ankylosis mouth breathing agenesis of condyle posterior positioning of mandible with regard to skull

5. Clinical features Micrognathia of maxilla – due to deficiency of premaxillary area and it appears to have the middle third of face retracted true mandibular micrognathia – uncommon and patient appears clinically to have severe retrusion of chin, steep mandibular angle and deficient chin button there is abnormal alignment of teeth the jaw is small enough to interfere with feeding of infant and may require special nipples in order to feed adequately

6. Management Orthognathic surgery