The Metopic suture which runs mid-line of the frontal bone will fuse normally with no skull defect between the ages of three(3) months of age and nine(9) months of age.

What age does metopic suture close?

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 is a persistent metopic suture?

Metopic suture is a dense fibrous joint extending from the nasion to the bregma. Normally, closure of this suture takes place between 1-8 years of age. Failure of this closure beyond 8 years leads to persistent metopic suture. ... Metopic suture may mimic skull fracture and may mislead an inexperienced forensic expert.