The fact that you know what "buccal corridors" means tells me that you have been listening (reading) to doctors who stress expansion as part of their treatment plan.The whole idea of buccal corridor problem is really a made up issue designed to justify expansion treatment. There is no good...
Since you haven't worn any of the aligners in 18 months, the easy answer would be to restart with the highest number aligner that fits comfortably, yet snuggly.But since you can't find numbers 2-6, then I'm afraid you'll have to redo all of the initial impressions and will probably incur a...
Unfortunately once the teeth move it’s not that easy to get
them back. You will have to consult with your orthodontist. You might be able
to go back few trays to realign them or
they might have to order some additional trays at this time.