This study establishes that metopic fusion may normally occur as early as 3 months of age, and that complete fusion occurred by 9 months of age in all patients in our series.

When should the metopic suture fuse?

It may fuse as early as 3 months of age and should fuse in nearly all patients by around 9 months of age ^1-4. Premature fusion of the suture is termed metopic synostosis (type of craniosynostosis) which can then result in trigonocephaly.

What age does Metopic ridge close?

They do not fully close until the 2nd or 3rd year of life. A metopic ridge occurs when the 2 bony plates in the front part of the skull join together too early. The metopic suture remains unclosed throughout life in 1 in 10 people.