1. For the growing dentition, the normal development of the teeth and jaws should not be hindered.
2. Try not to interfere with the normal physiological activities of each tooth.
3. It does not interfere with chewing, pronunciation and other oral functions.
4. It is easy to clean and not easy to cause dental caries or inflammation of periodontal tissue.
5. Simple structure, easy to take off and not easy to damage
6. Easy to adjust.
