What is an acceptable criterion when evaluating the quality of an impression?

When evaluating the quality of an impression, an acceptable criterion is the recording of anatomical landmarks such as the retromolar area and the maxillary tuberosity. These areas are crucial for creating accurate dental restorations and ensuring a proper fit. A well-made impression captures not only the teeth but also the surrounding soft tissues and bone structures that influence overall dental aesthetics and function.

Capturing these anatomical details helps in the fabrication of various dental appliances, including dentures, crowns, and bridges. If these landmarks are not recorded effectively, it can lead to complications in subsequent dental work, including poor fit and alignment issues.

In contrast, the presence of bubbles, distortion, poorly defined surfaces, or heavy occlusal contact marks indicates problems with the impression material or technique, leading to an inaccurate representation of the oral structures.