Certainly, both Invisalign and conventional braces are options that you can consider for orthodontic re-treatment. Studies have shown that both modalities are effective in the treatment of simple relapse cases.
It is advisable to visit an orthodontist for an examination and discussion on what will be the best option for you.
For more information, please join us at our 'Smile.Sparkle.Shine' public forum at NDCS on 24th of March 2018. http://bit.ly/2DQuCh6