Class notes NORCET

FETAL SKULL
The fetal skull is made of thin, pliable, membranous bones that are not fully fused, allowing it to
compress and mold during vaginal birth. It is a oval shaped.

Landmark of skull

vault
Face
base

Bone of vault

Two frontal bone.
Two parietal bone.
The occipital bone.




Sutures -Sutures are essential joint and are formed where two bones adjoin.

 Frontal suture -lies between frontal Bone.
 Sagital sutures -lies in between two parietal bone.
 Coronal sutures - each between frontal and parietal bone either side of the head .
 Lambdoid suture -it seprate the occipital bone and parietal bone.

, Importance of suture

 Gliding movement during moulding.
 To check engagement, position etc.

Fontanelle -Wide gap in the suture line called fontanelle. There are two type of
fontanelle. present -

1. Anterior fontanelle.
2. Posterior fontanelle.

1.Anterior fontanelle -

 It is formed by the joining of frontal,sagital and coronal sutures.
 Shape diamond.
 Diameter about 3cm.
 Closing 18month after birth.
3. posterior fontanelle -
 Formed by 3 sutures, sagital and two lambdoid suture .
 Shape triangular.