C. Lengthening of face
Lefort I – Slight swelling of the upper lip, ecchymosis is present in the buccal sulcus beneath each zygomatic arch, malocclusion, mobility of teeth.Percussion of upper teeth results in cracked pot sound. Guérin’s sign is present characterised by ecchymosis in the region of greater palatine vessels.
Lefort II – Step deformity at infraorbital margin, mobile mid face, anesthesia or paresthesia of cheek.
Lefort III – Tenderness and separation at frontozygomatic suture, lengthening of face, depression of ocular levels (enophthalmos), hooding of eyes, and tilting of occlusal plane, an imaginary curved plane between the edges of the incisors and the tips of the posterior teeth. As a result, there is gagging on the side of injury