This method is usually used for very slight movements. The retainer has a spring-loaded bar that pushes the teeth to the proper position.
This is a more cosmetic way to straighten teeth. The patient wears clear, plastic trays for 2-3 weeks at a time. Each time a tray is changed, the teeth are slowly moved. This method depends on the patient to properly wear the trays all day, every day except while eating. The result may not be as precise as conventional braces, but typically are.
Conventional braces are usually made up of metal brackets that are glued to your teeth and a wire connecting them. This method has been around for a long time and produces great results. The brackets can sometimes be clear or white. The wire moves the teeth into the proper position and the results are very accurate. Treatment time is very variable. After treatment is complete, the brackets and wires are removed and a retainer is made.