The invention discloses an invisible
dental arch expansion appliance and a preparation method thereof, and solves the technical problem that the opening effect of a palate center joint is poor when an upper jaw
dental arch is expanded in the prior art. The appliance comprises a
tractor, a left tooth socket and a right tooth socket, the left tooth socket is provided with a left jaw pad and a left traction hook, and the right tooth socket is provided with a right jaw pad and a right traction hook; an expansion driving mechanism is arranged between the left and right tooth sockets. The preparation method comprises the following steps: preparing a patient
dental cast, and positioning the spiral
dilator, the jaw pad and the traction hook on the
dental cast; manufacturing a retention base plate covering the whole
dental cast by using a dental high-molecular transparent material in a
hot press molding manner; the denture is taken down, the denture
tissue surface is filled with bonding resin, and the spiral expander fixing arm area is filled with bonding resin, so that the spiral expansion period fixing arm and the denture are fully bonded and fixed; and the retention base is
cut into a left part and a right part along the front-back
middle line of the
dilator. According to the invention, the problems of
dental arch stenosis and irregular
dentition of moderate and severe dental arch
crowding patients and the problems of insufficient maxillary development and excessive mandibular development of
deciduous teeth and tooth replacement periods can be effectively solved.