A baby’s skull is made of several plates of bone that fuse together over time to form a single structure. Previous research has shown that approximately one in 2,000 babies have plates that fuse too early — a condition called craniosynostosis — causing cranial deformities that can lead to learning impairments and other neurodevelopmental problems. Craniofacial surgeons across the country differ on when surgical intervention is needed for some abnormalities. Now, researchers are recommending a new method to help determine when surgery is needed.