Which term describes the negative reproduction of a tooth or dental arch?

The term that describes the negative reproduction of a tooth or dental arch is "impression." An impression is a mold made from the patient's teeth, gums, and oral structures, capturing their precise details. This negative imprint is essential in dentistry as it allows for the creation of models or casts for further procedures such as crowns, bridges, dentures, or orthodontic appliances.

Impressions are typically taken using materials that can accurately record the contours of the dental arch and surrounding tissues. Dental professionals use these impressions to create accurate reproductions of patients' bites and oral anatomy, which are crucial for effective treatment planning and execution.

In contrast, a model is a positive reproduction created from an impression, while a cast is a replica made from the model. A template refers to a guide or pattern that may be used in planning or executing a procedure but does not specifically pertain to the reproduction of dental anatomy.