They may be advertised as cheaper and easier to use, but DIY orthodontia devices can cause serious issues for your oral health.
When you order teeth straightening kits directly from a supplier, they require you to supply either the dental impression, or self-taken photographs of your teeth.
These patient-supplied impressions may be more likely to result in an improper fit of orthodontic appliances. This can cause your gum tissue to be impinged or stripped. It can also increase the chances of tooth loss or misalignment, and/or cause problems with your temporomandibular joint (TMJ), making chewing and other mouth movements very painful.
Orthodontic treatment should always be guided in-person by an experienced, licensed dental professional.