Whether it is aligner or braces, it's all about force. We are applying force on the teeth to move the teeth in a certain direction, it is quite technical but aligners generally are good moving teeth backwards compared to braces which move teeth towards each other.
That is why when you see an orthodontist for the treatment they say you need the wisdom teeth, we can use the wisdom teeth space to align your teeth to move it backwards. Aligners are good at closing open bites, maybe the front teeth don't meet at all so aligners are good at doing those because of the thickness of the aligners but all these things are very technical so it better to discuss with your orthodontist on your concerns then they can explain to you individually on what they think is best for your child.
