Final answer:
Full Arch Impression Trays (Silver Trays) are used in dental procedures to take impressions of the full upper or lower arch of teeth, which are then used to create models for various dental restorations.
Step-by-step explanation:
The purpose of Full Arch Impression Trays, also known as silver trays, is not related to the use of silver in amalgams for fillings. Instead, their role is specifically to take impressions of the full upper or lower arch of teeth. Such trays are used to create accurate models of a patient's dental arches, which are required for various procedures such as the creation of dentures, orthodontic appliances, or crowns. The metallic nature of these trays allows for durability and the ability to be sterilized, ensuring that they can be reused multiple times.