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 |
 |
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.