invisible braces can move her big teeth. I'm wearing Zhengya invisible braces, which is the fourth month. Now I can see that my teeth are moving slowly, and it seems to be much tidier. The doctor told me that orthodontics needs a slow process, and it is not a matter of a few days to move the teeth at will. The correction cycle usually takes 1-2 years, depending on the oral condition of each person. Under special circumstances, such as if you don't wear invisible braces properly, the time will be extended. I hope I can help you.