Buckteeth are usually divided into mild, moderate and severe. For buck teeth with different conditions, the correction time is different. If simple traditional steel wire braces are used for correction, good results can be achieved in about 2 years. However, for patients with skeletal malocclusion, it is usually necessary to intervene as soon as possible to improve their bones in the later stage. General early intervention needs 1-2 years. After early intervention, it is necessary to complete the replacement of teeth before the traditional wire appliance correction, and the total time may be extended to 2-3 years, or even 3-4 years. No matter how long it takes to correct, it is to achieve better therapeutic effect. If patients miss a good opportunity to improve their bones in childhood, they usually need surgical assistance to get better correction results in adulthood, which means more trauma and longer correction treatment time.