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The Barrer retainers (aka Spring retainers) carry acrylic bows both labially and lingually. [10] The original appliance extended only to the canines, however due to the risk of swallowing or aspiration, a modification which includes cribs on the first molars has been described. These retainers can be used to realign minor lower incisor relapse ...
Components such as Palatal Finger Springs, Buccal Canine Retractor, Z-Spring, T-Spring, Coffin Spring, Active Labial Bows (Mill's Bow or Roberts retractor), Screws and Elastics are all considered to be active components of the removable functional appliances. If a spring is moving one tooth it is made of 0.5mm thick stainless steel wire.
A Hawley retainer is also a removable orthodontic appliance made from a combination of plastic and metal that is custom-molded to fit the patient's mouth. Removable retainers will be worn for different periods of time, depending on the patient's need to stabilize the dentition. [47]
Orthodontic technology is a specialty of dental technology that is concerned with the design and fabrication of dental appliances for the treatment of malocclusions, which may be a result of tooth irregularity, disproportionate jaw relationships, or both. There are three main types of orthodontic appliances: active, passive and functional.
Viggo Andersen first used this appliance on his daughter's mandibular teeth in the summer of 1908. He took the mechanical braces off from his daughter, and he had her wear the "Biofunctional Retainer" throughout the summer in the mandibular arch. The maxillary arch received Hawley retainer. After a while, Viggo realized that her daughter's ...
A quad helix (or quadhelix) is an orthodontic appliance for the upper teeth that is cemented in the mouth.It is attached to the molars by 2 bands and has two or four active helix springs that widen the arch of the mouth to make room for crowded teeth, or correct a posterior cross-bite, where lower teeth are buccal (outer) than upper teeth. [1]