DIY aligners are clear appliances that promise to straighten teeth without clinical supervision, but they raise health concerns. While DIY aligners are convenient and cheaper, they lack important aspects of comprehensive orthodontic treatment like accurate dental impressions, ongoing monitoring, and a clinically controlled environment. The emergence of DIY aligners has been influenced by social media marketing from companies, but traditional orthodontics under a dentist's supervision is still the safest approach due to their expertise and ability to carefully monitor treatment.