Removable orthodontic appliances (plates) are a varied group of treatment devices that generally have a plastic part and wires. They have been used to straighten teeth since the mid-19th century, and the first braces were invented around the same time. Since then, both types of orthodontic appliance have developed a great deal thanks to the discovery of new materials, but innovation in braces is still continuing in terms of design, function and materials, whereas with removable appliances it is limited. Both braces and removable plates are still used to straighten teeth. While plates are more widespread in Europe and some Asian countries, braces are used everywhere in the United States, where they originated, and throughout the world.
This answer is for general information. Your own case needs an examination by an orthodontist.