After close to 2 years with Invisalign, I was supposed to be coming to the end of treatment this month. However a series of ill fitting aligners and problems getting appointments with my busy orthodontist has pushed my treatment out for 25 more sets (that translates to 50 weeks, which means I have about a year left). I had to have impressions (molds) recast twice during treatment, and I'm now on set 2 of my final 25 sets. So far, they fit perfectly. I don't really mind having to wear them one more year, as I have been thrilled with both the cosmetic results (it's amazing how fast your teeth move) and also with the relief they have provided for my TMJ symptoms. I still have chronic TMJ, and my chiropractor says it will probably never go away. But, whereas I used to have cracking and popping every day, now there are days that I don't even notice it. I can eat, talk, yawn, laugh, etc. and my jaw doesn't tighten up. So for me, that's significantly better than before. Before invisalign, I used to get lock jaw when my husband would go to kiss me!

That's how bad it was.
Perfect fit or not, the aligners have really helped me with not grinding my teeth at night. And that has resolved a good portion of the pain and tenseness that I used to wake up with daily. It's at the point where if I forget to wear my aligners to bed (such as falling asleep watching a movie) I regret it in the morning. So, even after I am done with the Invisalign treatment, I will be wearing the Invisalign retainers, possibly forever, just to help with the TMJ.