Expansion appliances increase the width of the jaws to broaden the smile and to prevent the extraction of permanent teeth. These appliances work best before all of the permanent teeth erupt. Before Treatment    After Treatment    Her smile compared to her parents. Narrow smile of her father This patient was treated with expansion. Notice the broad smile! Her mother has a narrow smile. Different Types of Expansion Appliances      1. Pendex Appliance with Springs Upper Pendex Appliance expands the width of the upper jaw and can move the molars back with springs. A Case Where The Pendulum Appliance Was Used To Correct A Narrow Arch And A Crossbite.    Crossbite And Constricted Arches Before Treatment    Before Expanding the Upper Arch           After Expanding The Upper Arch      2. Basic Upper Expansion Appliance Upper Expander without springs      3. Expander Used With The Herbst Appliance           4. Pendulum Appliance This appliance moves the molars back to correct a protrusion and crowding. Inserted in Mouth After the Teeth Have Been Moved Back      5. Distal Jet Upper and Lower Expanders after expansion Lower Expansion These appliances expand the lower arch to broaden the smile and in many cases can prevent the extraction of permanent teeth.      1. Lower Fixed Expander Before expansion After expansion - Lower arch width was increase 5 mm.      2. Lip Bumper Case treated with the lip bumper Before the lip bumper After the lip bumper Holding Appliances Some cases require a Nance to hold the upper arch and upper molars in place and some need a lingual arch to hold the lower molars and lower arch width.      1. Upper Nance Appliance Teeth are held while all of the teeth erupt. Front and back teeth are moved back with braces & elastic chains.      2. Lower Lingual Arch Back to top