advanced anterior position in both embodiments of the guide ramp the soft material surface of the ramp which contacts the incisor teeth is convexly curved the convex curvature approximates the anterior circumference of the dental arch the rearward surface of the guide ramp is bi concave and it encourages the user to posture his or her tongue against the roof of the mouth instead of below it in the floor of the mouth hence the anterior reposturing of the jaw has a maximum effect on reposturing the tongue in use a trial fitting is done before the appliance is heated and molded the guide ramp is positioned rearwardly further away from the lower incisor teeth so that the lower incisor teeth do not bite upon it when the appliance is trial fitted in the mouth the dental overly is fitted upon the template so that all surfaces of the dental overlay the upper plate except the biting surface are is exposed to near boiling water for approximately 30 seconds the template carrying the appliance is placed upon a mug or jar which is filled to its rim with the hot water holding the overlay by the stick extension the appliance is then lifted off the template and the overlay placed over the upper teeth and the patient bites down firmly then the dentist or a therapist molds the outermost surface of the overlay with finger pressure the existing concavities and tooth forms which are pre molded into the appliance serve to grip the contours of the teeth during the molding process so that the appliance becomes self retentive when it cools the appliance is then allowed to cool in the mouth for approximately one minute it is then soaked in cold water for.