To make a bleaching tray, the following procedures are typically involved:
1. First, an impression of the teeth is taken using a dental putty or a digital scanner.
2. A plaster model of the teeth is then made from the impression.
3. The tray material (usually a clear plastic) is heated and formed over the plaster model using a vacuum or pressure-forming machine.
4. The tray is then trimmed to fit the patient's mouth and to remove any excess material.
5. Finally, the patient is given the tray along with a bleaching gel to use at home. The dentist will provide instructions on how to use the tray and the gel safely and effectively.
Overall, making a bleaching tray is a relatively simple and straightforward process that can be completed in a single visit to the dentist.