Dental implants are also used in orthodontics to provide anchorage (orthodontic mini implants). Treatment can be undertaken using orthodontic treatments using dental braces. Dental cements have a wide range of dental and orthodontic applications. These deposits are commonly found on teeth or dental appliances such as orthodontic brackets. Angle contributed greatly to the design of orthodontic and dental appliances, making many simplifications. Headgear is most often used along with braces or other orthodontic appliances. They are also indicated for patients who have experienced a relapse after fixed orthodontic treatment. Alveolar prognathism can also easily be corrected with fixed orthodontic therapy. Pacifiers are orthodontic and designed to be placed in the mouth. This is commonly done prior to orthodontic treatment. There is also no evidence for a causal link between orthodontic treatment and TMD. See more details in the section Orthodontic headgear. After Darren got his orthodontic headgear removed, he changed clothes as well. Mahaffy's orthodontic appliance was instrumental in identifying her. Each country has their own system for training and registering orthodontic specialists.