The sagittal suture is the first to close, typically at around 22 years of age; the coronal suture

closes at around 24 years; and the lambdoid and squamosal sutures close at around 26 and 60 years, respectively (2). Premature fusion with osseous bridging is possible in all of these sutures.

When should sutures fuse?

Suture may begin to fuse by the age of 24. Average Suture closes between the ages of 30 years old and 40 years old.

What age do skull bones fuse?

The sutures let the skull size grow to accommodate the baby's growing brain. When the bones of the skull are fused together either at birth or fuse too soon, the condition is called craniosynostosis. The sutures of the skull fuse around the brain at around age 2 years.