Wisdom teeth that were present before orthodontic treatment need to be removed to avoid recurrence. If orthodontic treatment is completed, there is usually no need to remove wisdom teeth. Wisdom teeth are the last teeth to erupt in the oral cavity. Due to the insufficient position of the jawbone, wisdom teeth will be blocked to varying degrees when they erupt, and sometimes they will produce compressive resorption of the teeth in front of them. If wisdom teeth are not removed before orthodontic treatment, their eruption during orthodontic treatment will result in insufficient space in the jaw and slower tooth movement. Alternatively, the eruption of wisdom teeth after orthodontic treatment can lead to a change in the position of the already aligned teeth, which is not conducive to retention after orthodontic treatment. Wisdom tooth obstruction may also cause wisdom tooth pericoronitis, which will also affect the results of orthodontic treatment. Therefore, X-rays should be taken before orthodontic treatment, and wisdom teeth should be removed as soon as possible if they are present.