MOUTH EXPANDER Russian patent published in 1994 - IPC

FIELD: medicine. SUBSTANCE: mouth expander has arcs 1 , 2 provided with position locker 3, single-arm removable levers 4, support for teeth 7 and movable carriage 8 made in one end of lever 4. The carriage locks hoist 9 of soft palate. Tongue holder 11 is made in the other end of lever 4. At least single ring-shaped groove is made in the ends of removable levers 4. Radial threaded holes for locking screws 5 and 6 are disposed in the groove. Removable levers are attached to arcs by means of screws 5 and 6. Supports for teeth, soft palate hoist 9 and tongue holder 11 are made of material which is capable to memorize shape. EFFECT: improved reliability. 2 dwg