A collection of non-sterile devices designed to obtain a negative imprint of the teeth and/or upper palate (i.e., the roof of the mouth with the gums and teeth). It is subsequently used to make a mould for the manufacture of a custom-made dental prosthesis, orthodontic appliance, and/or oral appliance. The kit typically includes dental impression materials and a dental impression tray(s); reusable application devices are not included. Impression material is placed on the tray and the tray is then positioned in the mouth of the patient until the material becomes firm creating the mould. This is a single-use device.