In Chevallet fracture of nasal septum the mechanism of trauma is:
(b) Blow from below(Ref. Scott Brown, 8th ed., Vol 3; 1127)Blow directly from front will cause Jarjavay fracture.Blow from side may depress only one nasal bone. Side force can cause severe septal displacement, which can twist or buckle the nose.
Blow from above
Blow from below
Blow directly from front
Any of the above
Nose and PNS