[Maxillary expansion and its common pitfalls in early orthodontic treatment].

In recent years, with the popularization of early orthodontic treatment, maxillary arch expansion, as one of the most classical and commonly used treatment methods, has gradually become a focus of attention for both dental practitioners and parents of children. The efficacy of early orthodontic arch expansion treatment in improving children's dentofacial deformities depends not only on the adopted arch expansion program but also on multiple factors such as genetic factors, growth and development, tooth replacement, and the environment. This places high demands on the orthodontist's professional theoretical knowledge and clinical experience. Insufficient knowledge of the relevant principles may lead to misunderstandings in clinical practice, such as poor control of the indications, over-exaggeration of orthodontic effects, inappropriate timing of intervention, and lack of personalization of the arch expansion program. Combining relevant literature and clinical experience, this article summarizes the principles, common methods, timing, indications, and clinical applications of early orthodontic maxillary arch expansion. It also highlights common pitfalls, aiming to standardize early orthodontic arch expansion treatment and provide a strong foundation for the healthy development of children's teeth and jaws.