Whether or not a rotunda brace works is not certain. If you can work with them for a long time and the deformity is mild, they are usually useful; if you cannot use them for a long time and the deformity is severe, they are not useful. Rotator cuff braces are mainly for patients with internal derangement of the knee, but the effect of using rotator cuff braces for correction is not certain, and needs to be based on the actual situation, with obvious individual variability. In general, the lower limb deformity degree is less patients with long-term cooperation with the doctor to use the rotator leg braces is useful, the correction effect is obvious. However, for patients with severe lower limb deformity and those who can’t insist on using it for a long period of time, the rotator cuff is useless, and they need to consider surgical treatments, such as osteotomy, semi-epiphyseal blockage, and so on. There are physiologic and pathologic knee entropion, usually physiologic knee entropion does not need to use the rotator leg braces, and it can be improved with age, at about 2 years old. To summarize, for patients who need to be treated for knee entropion, they need to strengthen their daily life management, cooperate with doctors for active treatment, and follow up regularly.