Question
Estimate the approximate age of the child from the X-ray given below?
A. Below 2 years.
B. Below 3 years.
C. Below 4 years.
D. Below 5 years.
Show Answer
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Correct Answer » A
Explanation
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Ans;A. Below 2 years
The given X-ray is of a child who is below 2 years of age as their is no ossific centre in the wrist.
Ossification of the wrist can be divided into two components:
- carpal bone ossification centres
- distal radial and ulna ossification centres
Ossification of the carpal bones
Ossification of the carpal bones occurs in a predictable sequence, starting with the capitate and ending with the pisiform.
At birth, there is no calcification in the carpal bones. Although there is great individual variability, approximate ossification times are as follows:
- capitate: 1-3 months
- hamate: 2-4 months
- triquetrum: 2-3 years
- lunate: 2-4 years
- scaphoid: 4-6 years
- trapezium: 4-6 years
- trapezoid: 4-6 years
- pisiform: 8-12 years
Excluding the pisiform, a handy way to remember the order of ossification is to start at the capitate then move in a counterclockwise direction on the volar surface of the right carpus.
Ossification centres of the distal radius and ulna
- distal radius: 1 year
- distal ulna: 5-6 years
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