Under normal circumstances, invisible dentures cannot be worn for a lifetime and are generally not recommended for long-term wear. Invisalign is a removable denture that can be removed and worn. It is usually composed of elastic resin and artificial teeth, and relies mainly on the dental bed for support. After the extraction of real teeth, the height and width of the alveolar bone will be reduced, and the bone will gradually become thinner. After a long period of time, the previous invisible denture will not be a perfect fit for the structure of the teeth, and will need to be remodeled. In addition, the invisible denture in the process of long-term wear, the local resin will gradually aging, resulting in reduced elasticity, poor retention, easy to fall out of the situation, affecting the chewing function, in the long run, will also have a certain impact on the teeth. It is recommended that patients usually pay attention to keep the invisible denture clean, try to avoid eating some hard food, and go to the hospital regularly for review, to prevent cracks and breakage of the denture.