What you said is that the color of the teeth around the bracket is chalk, which is not very shiny. That's because food residue and dental plaque remain after wearing brackets, which leads to demineralization of tooth surface. Generally, minerals in saliva will remineralize teeth (provided that oral hygiene is maintained), and chalk demineralization area will disappear; If fluoride toothpaste is used, or fluoride drugs such as Xinshan Mountain are used, the mineralization effect will be faster and better.