Final answer:
The anterior portion of a maxillary study model is trimmed to create a more accurate representation of the upper jaw. The maxillary bone forms the upper jaw and contains the upper teeth.
Step-by-step explanation:
The anterior portion of a maxillary study model is trimmed to create a more accurate representation of the upper jaw. The maxillary bone, also known as the maxilla, forms the upper jaw and contains the upper teeth. The alveolar process of the maxilla is the curved, inferior margin that supports the upper teeth.