Abstract: A mouthpiece for use in diving or medical equipment, among others made of moldable resilient material having an offset between upper and lower jaw, a bite plane which is tapered with the bite plane formed by wings which have varying thickness to create the taper in which the wing members have substantially vertical surfaces on either side thereof for contacting the lateral surfaces of the user's cuspids and bicuspids and in which the main body portion has upper and lower apron and eminence skirts for avoiding contact with the user's frenum and cuspid eminences and in which the internal wing members have a range in size, at the cuspid, from about 6 to about 12 mm in width, from about 14 to about 40 mm in length and from about 2 mm to about 8 mm in thickness. The greater the offset, the shorter the length of the internal wing members.

Abstract: A mouthpiece for use in diving or medical equipment, among others made of moldable resilient material having an offset between upper and lower jaw and a bite plane which is tapered with the bite place formed by wings which have varying thickness to create the taper.