For males and females, there are different time periods for the age of orthognathic jaw surgery. Because women grow earlier than men in the growth and development stage, women generally require about 18-19 years old, which is basically close to the growth arrest stage, when the jaws and soft tissues are basically set and can undergo orthognathic surgery. For males, it is generally around 20 years old, and may even continue to grow again at 22 or 23 years old. It is generally recommended that male patients be better off at the age of 22 or later, so that the bite, jaws and facial shape will be relatively more stable after surgery. Some scholars now also believe that with the improvement of life, growth and development may be more advanced, so according to clinical observation, or after clinical examination, moderate advancement is still possible. Overall, it is best to perform orthognathic surgery at the end of growth and development.