What must a maxillary final impression include for accurate representation?

The maxillary final impression is crucial for accurately capturing the anatomy of the upper arch, which is essential for creating well-fitting dental prosthetics or appliances. An accurate representation of the maxillary area requires an inclusion of the tuberosities, which are the rounded bony prominences located at the back of the upper jaw, just behind the molars.

Including the tuberosities in the impression is vital because they play a significant role in the stability and retention of dental prosthetics like dentures. A thorough recording of this area ensures that the final restoration will have an appropriate contour and fit, thereby enhancing the comfort and functionality for the patient.

While the alveolar ridge, soft palate, and teeth alignment are also important aspects of a maxillary impression, the tuberosities specifically provide critical anatomical landmarks that help in achieving proper fit and support. Their omission could lead to poorly fitting appliances and affect the overall treatment outcome.