<prompt> Fracture ala signature isGutter fractureDepressed fractureRing fractureSutural separation  <response>: Depressed fractureFracture ala signature:When a poion of fractured bone is driven inwards to a distance equivalent to the thickness of the skull table Heavy weapon with a small striking surface Ex:- Hammer, stone, chopper Due to local deformation of skull. It is also called fracture ala signature signature fracture, as the shape often points towards the shape of the offending weapon. Gutter fracture: seen in oblique bullet wounds Ring fracture- Fracture around the foramen magnum 