Rinsing with salt water seems to work well for me. I have no idea what the science says about it though. But there is some talk in new treatments about ionizing stimulating healing, and I wouldn’t be surprised if salt water does a bit of that too.?
I also wouldn’t be surprised if it helps remineralize. Very subjectively it feels like it does a little, but it’s easy to fool oneself with wishful thinking. Preferably have a dentist monitor results.