Abstract
Ultrasonic treatment reduced residual monomer in methyl methacrylate-based orthodontic base-plate materials
Highlights
Orthodontic treatment can be with either fixed or removable appliances
Polymethyl methacrylate, acrylic resin has been widely used in the constructions of both active and passive removable orthodontic appliances for many years [1]
The three specimens that were divided into nine solutions were tested for pass/fail determination of residual monomer (RM), which is defined in ISO 20795-2 (2013)
Summary
Orthodontic treatment can be with either fixed or removable appliances. Polymethyl methacrylate, acrylic resin has been widely used in the constructions of both active and passive removable orthodontic appliances for many years [1]. Orthodontic appliances are used for newborn patients with cleft lip and palate, space maintenance, tipping teeth, overbite reduction, thumb-sucking deterrence, block movements and retention after active treatment [2,3,4]. The appliances are used in children, adult and elderly patients. The base plate of orthodontic appliance is kept in contact with oral mucosa for a long time during treatment. A spray-on technique, in which the polymer is saturated by its monomer, is commonly utilized in orthodontics for removable orthodontic appliances [5]
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