Permanent solution needs a permanent treatment. Braces are the final word.

Gap between your teeth can be cause of orthodontic treatment relapse and /or gums issues. Kindly visit a orthodontist for the best option possible in your case .

Dear practo user Orthodontic relapse needs orthodontic intervention only Composites and veneers can be done, but if the gaps increase it will be a problem. So you can use removable orthodontic appliances, followed by permanent retainers to prevent relapse. This is ideal And this will not take 1 to 2 years again Your orthodontist is the best person to discuss And solve  your issue

Cheap solution will be closing gaps with composite restoration. You can also go for veneers but they are costly.