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There is only a small window of opportunity to correct the infantâs skull. As the rate of skull growth is faster in the early ages, helmet therapy is most effective between the ages of 3 to 7 months. However, helmets are still effective until the infant is 12 months old.
Anatomical helmets adapted to the inner head structure were invented by neurosurgeons at the end of the 20th century. Helmets used for different purposes have different designs. For example, a bicycle helmet must protect against blunt impact forces from the wearer's head striking the road.