How to Fix One Tooth in a Crossbite?! (photo)

From what is visible in the photo, you may be able to correct this with an appliance that gently pushes your upper tooth out past the lower one. Braces may not even be needed and it could take 4-6  months.

This tooth is basically the "cornerstone" in the arch.  It is designed to withstand more force.  That makes moving it with clear aligner therapy (Invisalign, Clear choice) very difficult to impossible.  Conventional orthodontics with wire and brackets would be the only predictable way to move these two teeth that are in cross bite.  If you are totally opposed to conventional orthodontics there is another option.  First a gingivectomy to raise the tissue on the upper right cuspid, then a porcelain restoration for both teeth (upper and lower) the align them correctly.  I would strongly encourage you to go the conventional orthodontic route as it is more conservative and predictable.

You sure have a beautiful, almost picture-perfect smile.

The best possible option is to move that tooth forward into alignment using one of the many methods available to dentists today.. (traditional wires and brackets, Invisalign, fast-track wires and brackets such as the Six Month Smile system, Inman Aligners, etc.)  I've treated many similar cases using Invisalign and Six Month Smile with excellent results.  Realistically speaking, you can expect about 9 months to one year of treatment.

I would not recommend an implant since that will take almost as long as moving the tooth into alignment.   Nor do I recommend the crown since your dentist will have to remove a significant portion of the tooth away so they can place a crown that aligned with the other teeth.  As such, that tooth will more than likely require to have a root canal.  You may even find some dentists who would not preform the procedure on your behalf even if you requested them to do so.