The narrow maxillary arch is a common malocclusion, often accompanied by tooth crowding, mandibular deviation, mandibular protrusion and other deformities, and often requires maxillary expansion for orthodontic treatment. The new technology of implant-assisted maxillary arch expansion is based on the original arch expander with the addition of implant nail support device, which maximizes the effect of bony arch expansion and minimizes the side effects caused by conventional arch expansion. Expanding the width of the bony arch reduces the possibility of tooth extraction in cases of tooth crowding. Breaks the age limit of conventional rapid arch expansion and can be used for adolescents older than 15 years old, young adults, and even older adults. Reduces the need for adult patients to undergo maxillary surgical assisted expansion to avoid surgical risks. Increase the effect of bony arch expansion and reduce the side effects of conventional arch expansion such as reduction of buccal alveolar bone height, perforation or cracking of alveolar bone, and recurrence. Indications: Maxillary arch narrowing with crowded teeth Bilateral posterior retrusion Unilateral posterior retrusion with mandibular deviation