Question
The marked structure shown in the photograph closes at the age of:
| A. |
6 months
|
| B. |
2 years
|
| C. |
3 years
|
| D. |
6 years
|
Show Answer
|
Correct Answer � B
Explanation
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|
Ans.B. 2 years
- The marked structure is metopic suture between two halves of frontal bones.
- Each half of frontal bone ossifies from one primary center around the age of 8th week of intrauterine life.
- At birth, 2 halves of frontal bone are united by Metopic suture (fibrous joint).
- Metopic suture is completely replaced by bone at about 2 years.
- Premature closure of metopic suture is–trigonocephaly.
