Abstract: A toroid shaped mouthpiece that is inserted into a patient's mouth between the patient's gums and cheeks. The mouthpiece is particularly configured to sustain an oral space through which the patient can breathe from an anesthesia face mask. With the anesthesia face mask in place over the patient's nose and mouth cavities, the mask generates a good seal with the patient's cheeks because the mouthpiece insures that the cheeks will remain flushed out against the mask. This is particularly advantageous in the case of edentulous patients.