If you have gaps between your teeth, they're chipped or fractured, they are worn or misshapen, or if they are stained and bleaching treatments have proven ineffective, veneers may be the corrective option you're looking for. Veneers are thin covers (or "caps") that look like natural teeth. If you choose to get veneers, your dental professional will remove a thin layer of tooth enamel, which is irreversible, then fix the veneers to your teeth using a light-sensitive resin. Another option available to you is no-prep veneers, which the American Academy of Cosmetic Dentistry explains are attached without removing as much of your tooth enamel.
Your orthodontist is best positioned to make recommendations to straighten your teeth tailored to your specific needs. Hopefully, now that you have a solid foundation of information regarding your options, you and your dental professional will be able to align on a choice to straighten your teeth that will make you smile.