The frontal bone forms the forehead, the roof of the eye sockets, and part of the anterior cranial floor. It contains the frontal sinuses and provides attachment for several facial muscles and the anterior scalp.
The frontal bone is most frequently fractured at the supraorbital rim and anterior sinus wall during facial trauma. Frontal sinus fractures are classified by displacement, posterior wall involvement, and nasofrontal duct injury. Posterior wall fractures with dural tears require neurosurgical involvement. The frontal sinuses vary enormously in size and pneumatisation — approximately 4 percent of people are born without them — making them unreliable for forensic identification without prior imaging.
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