Norma Verticalis

Anterior fontanelle

Coronal suture:

• This is placed between frontal Lone and the two parietal bones

Sagittal suture:

• Sagittal suture is placed between two parietal bone

Read And Learn More: BDS Previous Examination Question And Answers

Sagittal suture Significance:

• Sagittal suture closes at 18 months of age
• Sagittal suture allows growth of brain
• If fontanelles fuse early, brain growth is stunted
• If anterior fontanelle is bulging, there is raised intracranial pressure
• If fontanelle is depressed, it shows decreased intracranial pressure
• This indicates dehydration
• During parturition, it helps to determine the position of vertex

Question 2. Metopic suture

Answer:

• Sagittal suture has a rare occurrence

Sagittal suture Site:

• Sagittal suture Site lies in the median plane
• Sagittal suture Site separates the two halves of the frontal bone

Sagittal suture Incidence:

• This is occasionally present in about 3-8 % individuals

Question 3. Name the bones meeting at bregma
Answer:

• Two parietal bones and
• Frontal bone and

Question 4. Anterior fontanelle.
Answer:

Coronal suture:

• This is placed between frontal bone and the two parietal

bones Sagittal suture:

• bones Sagittal suture is placed between two parietal bone

Anterior fontanelle:

• Anterior fontanelle is a meeting point between the coronal and sagittal suture