Invisible aligners are clear retainers that straighten and align your smile over time. They are way less expensive and painful than traditional braces to straighten teeth, not to mention more discreet, comfortable and aesthetic. Clear-alignment treatments aren’t easily noticed by others because they are made of clear plastic or acrylic material instead of the metal wires some of us had on our teeth as kids. Sometimes called clear aligners, invisible braces or dental aligners, invisible aligners are an excellent option for those with: Crooked teeth, Gapped teeth, Crowding, Overlapping, Overbite & Underbite.