Can Invisalign reduce chin projection?

Invisalign can change the angle but you must have your Invisalign dentist dictate that angle you wish to have on their software, ClinCheck, when they design and order your aligners.

The problem is that your gingival papilla between 9 and 10 is blunted, does not fill in the space. I definitely would not recommend more IPR.  Bonding would be an option, but I would first consult with a periodontist and see if the papilla can be reconstructed to fill in the gap.  

I would agree that your treatment is not complete.  The fact you are on your 3rd refinement tells me that either  your provider is not very experienced (or you are doing a self aligner treatment), or, you are not wearing your aligners as prescribed.  Given where your teeth are now, you should ex...

Yes, Invisalign should be able to remedy this problem quite easily. Moving teeth up or down can be done with this process and I'm sure your dentist knows how to do this.

It is OK to place your Invisalign right back in after scaling and root planing. But if your gum is sore then it’s recommended that you wait til the next day after your deep cleaning. I would not wait any longer than 24 hours.

Contact you dentist immediately.  If you need a strong cleaning at the office it should remove the discoloration.  Also if your engagers are removed the aligners can be used as whitening trays to return your teeth to a brighter whiter shade again.