Sagittal suture

Last revised by Craig Hacking on 12 Feb 2023

The sagittal suture is the midline cranial suture between the two parietal bones.

At the junction of coronal, sagittal and frontal sutures, the anterior fontanelle is located which is open at birth and usually fuses at around 18-24 months after birth. The junction of the coronal and sagittal sutures after fontanelle closure is known as the bregma.

At the junction of sagittal and lambdoid suture, the posterior fontanelle is located which is open at birth and usually fuses at around 2-3 months after birth. The junction of the sagittal and lambdoid sutures after fontanelle closure is known as the lambda.

Related pathology

  • premature fusion of the sagittal suture results in scaphocephaly

  • normal fusion of the sagittal suture occurs at approximately 22 years of age

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