Patient: Description (onset time, main symptoms, hospital visited, etc.): Hello doctor: My daughter is 8 years old and just finished replacing her second incisor, but the teeth that just came in are slanted, and one is on the side of the bed, I’m worried that if she goes on like this, she won’t know what her teeth will look like when she replaces them in the future, they are not aligned at all. Should we wait until she has all her baby teeth replaced, or should we start now, or is there any other good way to get the back teeth to grow in more evenly? Doctor: the teeth of the replacement period belongs to the “ugly duckling” stage, some permanent teeth when the first eruption of mild crowding, misalignment can be alleviated with the development of the jawbone, the replacement gap between the permanent teeth and milk, so mild dental misalignment in the Tia device without orthodontic treatment. However, the following cases need to be treated: 1, permanent teeth have erupted, but the milk teeth remain, need to be extracted in time to make room for the growth of permanent teeth. 2, individual teeth can be orthodontic early. 3, there are skeletal problems, such as recession of the lower jaw, the upper jaw is underdeveloped, which is commonly known as “ground envelope” or “sky envelope”, etc., should be early functional or orthopedic treatment. 4.The treatment of interrupted teeth. The rest can wait for the complete replacement of permanent teeth after orthodontic treatment. The specific situation can be consulted by professional orthodontist.