Category “Clear aligners”

Q.
I left my aligners at home this weekend when I went away by accident. That meant two days without wearing them and now when I got back the set I am on feel fine, thought a little tight. If I was to wear them a couple more days after end point for them then would they be okay? I will make sure to tell my dentist. But, I was thinking how long would be the absolute maximum that you could not wear the aligners say half way through treatment? I do not plan on doing this by the way. I’m not that stupid.

Q.
How long is it now that the invisalign system has been on the market? Is it something that had only recently come to the UK or has been about for quite a bit now, and how well founded is it now in terms of technique and results?