By only wearing aligners at night the inconvenience and discomfort of clear aligners can be minimised.
While standard clear aligner treatment is significantly more convenient than permanently attached bracers, some people still find clear aligners a hassle to remove while eating or are concerned about being noticed receiving treatment. Additionally, as straightening teeth can be uncomfortable, some are attracted to the option of sleeping through the worst of it.
However, it is not all positive. Treatment is only available for teeth that require minor straightening with only simple movements being consistently achievable, the treatment time can be more than double, and discomfort actually lasts longer as the teeth are moving for a longer period.