The maxillary arch refers to the curved structure formed by the upper jaw, which houses the upper teeth. It is part of the skull and plays a crucial role in the alignment and function of the teeth. The maxillary arch supports the upper dental arch and is essential for proper chewing and speaking. This arch is composed of the maxilla bone, which connects to other facial bones. The shape and size of the maxillary arch can vary among individuals and can influence dental health. Orthodontic treatments often focus on the maxillary arch to correct alignment issues and improve overall oral function.