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 reusable application devices (e.g., cartridge gun), and might include a dental impression tray(s). 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 reusable device that may contain some disposable devices.