[Epidemiology of the mild and moderate brain injuries].

Unlike severe head injuries upon which much attention is focused, mild or moderate brain injuries are not or not well known and often neglected in maxillofacial surgery. Nevertheless, they are frequent in our routine facial traumatology activity. Studying the epidemiological data shows that mild brain injuries account for 64 to 94% of all head injured patients whereas moderate injuries occur in 3 to 23%. Furthermore, owing to their frequent occurrence, their high potential for sequelae and because they especially affect young people, they are a real public-health problem.