Not Happy with Invisalign Results. Can I Do Traditional Braces Later?

It sounds like you have multiple issues with the final result you obtained with Invisalign.  I agree that you may best be served by finishing your case with braces because they allow precise positioning of teeth and closing of  spaces.  Visiting an orthodontist may be a good option for you because of the complex nature of your case.  There may be some restorative work needed as well ... but the bonding used to close the spaces which remained after Invisalign should not be a problem as it is easily removed or reshaped.  Your case illustrates an important fact about Invisalign: it is a great tool, but not a panacea. 

Invisalign offers 3 "refinements"  (additional aligners) with each Invisalign Full treatmentto hopefully com;eye your treatment.. However, Invisalign Express which limits the aligners to 10 or less does not offer refinement aligners. 

It sounds like you have gone to a general dentist since he "closed" your spaces with composite restorations.

Unfortunately general dentists are not really trained in orthodontics .... of any kind. As such, there is a major difference in training and experience between an orthodontist and a general dentist. I would suggest that you see an orthodontist if you seek re-treatment.

Blessings!