What is the difference between aligners and braces? Unlike traditional braces, Invisalign aligners are made from clear plastic and do not involve any wires, elastics or brackets. They are removable, and each set is worn for around two weeks before being replaced by the next set. Throughout this process, the teeth gradually move into the desired position. Why are aligners faster than braces? While the exact amount of time depends on each individual patient's needs, using this aligner system typically works faster when it comes to straightening teeth than traditional braces. ... The one-piece aligners are able to provide force to the teeth as a whole vs. braces that move each tooth individually.