An impression is a positive reproduction of teeth and surrounding oral tissues. The model created from the impression is a negative reproduction of the structures. What is the accuracy of these statements?

The correct answer reveals a misunderstanding of the terms used in dentistry regarding impressions and models.

The first statement claims that an impression is a positive reproduction of teeth and surrounding oral tissues; this is incorrect since an impression actually serves as a negative imprint of the oral structures. It captures the shape and details of the teeth and surrounding areas, much like a mold does.

The second statement describes the model created from the impression as a negative reproduction of the structures, which is also inaccurate. In reality, the model is a positive reproduction, as it replicates the shape of the impression to provide an accurate representation of the original structures.

Given that both statements misrepresent the roles of impressions and models in the dental setting, it aligns with the correct choice that asserts both statements are false. Understanding these definitions is crucial for effectively communicating about procedures and ensuring clarity in dental practices.