1.What is skeletal age and skeletal age standard? Bone age is the abbreviation of skeletal age, which is a developmental age obtained by comparing the actual development of a child’s bones with the standard developmental level. Bone age represents to a large extent the true developmental level of the child, so it is more accurate to use bone age to determine the maturity of the human body than the actual age. When an individual’s skeletal maturity is compared with the standard atlas, the age of the skeletal maturity is equal to the standard atlas of a certain age, which is the age of the skeleton, and it is the indicator to determine the bone maturity. 2.Why do doctors often determine the bone age of children? The changes in human bone development are basically similar, and the development process of each bone has continuity and stages. Bones at different stages have different morphological characteristics, therefore, bone age assessment can reflect more accurately the growth and development level and maturity of an individual. It not only can determine the biological age of children, but also can understand the growth potential of children and the trend of sexual maturity through bone age at an early stage: the adult height of children can also be predicted through bone age, and the determination of bone age is also very helpful for the diagnosis of some pediatric endocrine diseases. It is also a great guide for the treatment of some patients with short stature. 3.Why can bone age reflect the height potential of children? Skeletal age, or bone age for short, is determined by the degree of bone calcification in children. Because bone age can more accurately reflect the level of development at each age in the process of human from birth to full maturity, it is most widely used in each developmental age. In particular, bone age plays a more important role in the analysis and diagnosis of endocrine diseases, developmental disorders, nutritional disorders, hereditary diseases and metabolic diseases. The use of bone age inferred development, thus reflecting the state of physical growth and development, helps to understand the potential of children’s height development. Example: A boy is 12 years old but his bone age is 13 years old, which indicates that although the boy is only 12 years old, he is developing faster and his body has reached the level of physical development of a 13-year-old boy. Because the age of maturity of the wrist bone in Chinese men is about 18.4 years, the boy would normally continue to grow and develop for no more than 5.4 years. And if his bone age is 11 years old, it means that his development is slower and only developed to the level of a normal child of 11 years old, so under normal circumstances his remaining development time is still 7.4 years can be considered that the girl has greater potential in height growth. 4.What is the relationship between bone age and age and maturity? The relationship between bone age and actual age can be shown by the bone age difference. This is the difference between actual age and bone age, and also the specific number of years between the two. If the difference between the actual age and the bone age is positive, it means that the bone age is behind the age; if the bone age difference is negative, it means that the bone age is ahead of the age. Usually, ±2 years is the normal range of bone age difference, where a bone age difference of ±1 year is normal. When the rate of increase of bone age is greater than the rate of height growth, the epiphysis will heal earlier and the growth period will be shortened, which will eventually result in the reduction of adult height. 5.When does the bone age of adolescents usually close? Generally, girls are at the age of 16 or 17 and boys are at the age of 18 or 19. Girls develop fastest at the age of 11-15 years old during puberty, and boys develop fastest at the age of 12-16 years old. Puberty is the fastest growing period in a lifetime, and spring is the fastest growing period of the year. Parents are especially reminded that adolescents in this age group: A. Check hair or blood tests to detect whether there is a deficiency of trace elements calcium, zinc, iron ……. B. Pay attention to many aspects of nutrition. C. Drink milk before going to bed. 6, if my child’s bone age has closed can there be any way to open again? First of all, we must clarify whether you have consulted and diagnosed in the regular hospital specialist, if it is said that after the doctor’s diagnosis, the child’s bone age is really closed, then it can be said that there is no way to make the closed bone age open again, and I hope you do not believe in the market false advertising to avoid being deceived to cause unnecessary losses.