<prompt> In fracture maxilla most common nerve involved is?Infra orbital nerveSupraorbital nerveTrochlear nerveMandibular nerve  <response>: ANSWER: A Infra orbital nerveREF: Dhingra 4th ed p. 174Clinical Features of maxillary fractures:Ecchymosis of lid, conjunctiva and scleraEnophthalmos with inferior displacement of the eyeball. This becomes apparent when edema subsides.Diplopia, -which may be due to displacement of the eyeball or entrapment of inferior rectus and inferior oblique muscles.Hypoaesthesia or anesthesia of cheek and upper lip, if infraorbital nerve is involved 