This is a new system which is very similar to Invisalign. Due to being new to the market, they offer better prices and even free retainers at the end. This system uses number of aligners to move the teeth gradually to the right position. Depending on how crowded teeth are and what we expect to achieve at the end, number of aligners needed to achieve that goal is going to be different. The more movement we need, the more aligner we get. each aligner needs to be worn for 2 weeks before moving to the next one. In this system, same as Invisalign, some attachments will be used to make the forces on the teeth stronger. These attachments work as handles which aligners use, to pull or push the teeth to the correct position.