There are a lot of orthodontists today who refer to extractions of healthy teeth as amputation because of the damage it causes. The traditional orthodontists that promote retraction with braces often say that a retainer (an appliance worn at night or bonded wires glued to the back of the teeth) https://www.xaphyr.com/blogs/1180916/Emergency-Dentist-When-and-Why-You-Need-Urgent-Dental-Care