What describes a perforated tray?

A perforated tray is specifically designed for dental impressions and features holes that allow the impression material to flow through and create a better bond with the tray. The perforation facilitates the removal of the impression once it has set, ensuring that the material adheres adequately to the tray during the impression process. This design is crucial in obtaining accurate impressions that reflect the details of the teeth and oral structures. The holes also help minimize the risk of distortion during impression removal.

The other options describe trays that serve different purposes. For instance, while a tray for radiographs would be critical in capturing images of the teeth and surrounding structures, it does not need perforations for this function. Similarly, a tray for administering local anesthetics would not require a design focused on impressions, and a tray used solely for orthodontic models would be tailored specifically for that type of impression, possibly without perforations. Thus, the defining characteristic of a perforated tray is its suitability for obtaining dental impressions.