The ossification centers of the baby’s carpal bones appear beginning at 3 months of age and come out in full at about 10 years of age, with 10 in total.
The ossification centers in the wrist bones of babies begin to appear at 3 months of age and come out in full at about 10 years of age, for a total of 10. Therefore, the number of ossification centers in the wrist from 1 to 9 years of age is approximately the number of years plus one.
There are no ossification centers in the wrist at birth, and the order of appearance after birth is as follows: cephalic bone, hook bone (around 3 months old), lower radial epiphysis (around 1 year old), triangular bone (2-2.5 years old), lunate bone (around 3 years old), large and small polygonal bones (3.5-5 years old), navicular bone (5-6 years old), lower ulnar epiphysis (6-7 years old), and bean-shaped bone (9-10 years old).
The ossification center of the carpal bones is an important basis for evaluating the bone age of children, and is an important reference value for predicting the growth and development of children and assessing their final height. However, the age at which normal ossification centers appear varies widely, and caution must be exercised when diagnosing delayed bone age.