Colour stabilities of three types of orthodontic clear aligners exposed to staining agents

Abstract

Clear orthodontic braces can still be improved to avoid coloration changes resulting from coffee drinking. Clear aligners are an alternative to traditional teeth braces, often chosen because they are more cosmetically pleasing. Patients are advised to remove them while eating and drinking by drinking, but many do not comply. Zhi-He Zhao, Jun Liu and colleagues from Sichuan University in China tested clear aligners made of three different materials from three companies (Invisalign®, Angelalign®, and Smartee™) for coloration changes after immersion in coffee, black tea, red wine and water. The three types of devices showed color stability after 12 hours of immersion, except for the Invisalign®aligners immersed in coffee. These were more prone to pigmentation and had a rougher surface after seven days of immersion in coffee than the other aligners.

Keywords

aesthetics / clear aligner / clear aligner material / colour stability / orthodontic appliance

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