palatal expander for the maxilla, . the removable orthodontic appliance to make the upper jaw wider

adult appliance arch braces children closed dental dentist dentistry device early expand expander expansion functional graphic growing hooks illustration isolated jaws jelly key kids mandible maxilla medical metal middle narrow occlusal orthodontic orthodontist orthopedics palatal plastic plate removable retainer screw smile specialized technician teeth treatment upper vector view white wires