What is the typical depth of an impression?

The typical depth of an impression being 2-3 mm is based on the need to capture sufficient detail of the oral structures, including the teeth and surrounding tissues, without causing discomfort or distortion. This depth allows for accurate reproduction of anatomical features, which is critical for creating dental restorations, appliances, or orthodontic models. A depth within this range ensures that the impression material compresses appropriately, providing a reproducible negative imprint of the oral cavity while also allowing for adequate flow and detail capture.

Impressions deeper than 3 mm might not provide better detail and could lead to unnecessary discomfort for the patient. Conversely, shallower impressions might fail to capture adequate detail for proper diagnosis and treatment planning, potentially compromising the effectiveness of the dental procedures that will be based on the impressions. Thus, 2-3 mm strikes the right balance between comfort and accuracy in clinical practice.