National Dental Assisting Examining Board (NDAEB) Practice Exam

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Prepare for the National Dental Assisting Exam with comprehensive quiz questions, including multiple choice and detailed explanations. Equip yourself for success!

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A negative reproduction of a patient's dental arch is referred to as what?

Model
Cast
Impression
Template

The correct answer is: Impression

The term used to refer to a negative reproduction of a patient's dental arch is "impression." An impression is created by having the patient bite into a material that captures the exact contours and features of their dental arch and surrounding tissues. This material can be alginate, polyvinyl siloxane, or other types of impression materials that harden or set appropriately to retain the shape. Once the impression is taken, it can be used to create a positive reproduction known as a cast or model. The use of impressions is crucial in various dental procedures, including creating crowns, bridges, dentures, and orthodontic appliances, making them an essential aspect of dental assisting and practice. The model and cast typically refer to the positive representations obtained from the impression, while a template usually serves a different purpose, often related to guiding procedures rather than reproducing anatomy. Therefore, the correct identification for the negative reproduction of a dental arch is an impression.