Braces + Molding Q&A

I broke my top retainer and bottom retainer a month ago and Im not sure if my teeth would have moved a lot by then but Im the instance they havent, can a mould from my most recent appointment be used to re-align my teeth or would I need braces or Invisalign to straighten my teeth again?

My provider is not reassuring. I'm on my second set of molds and there is a large enough gap on my upper pallet that I can hardly speak clear and air and saliva push out my top front teeth when I speak. This makes me concerned that my initial molds were not done correctly. My dentist thinks it's fine but I have not felt confident in this process from the beginning. I cannot speak without bubbles and spit coming out of my top teeth. It's asinine to think this is better than braces.

If not, what should I do If my teeth have already moved? I have already had braces twice in my life. And is it possible to get permanent retainers?

I lost mine today after having it for 6 months.I got my braces done September 2016 and they took them off May 31, 2017 .. ive been wearing my retainers when i go to sleep for the past 6 months

So I want to go through braces again and I got an invisilign set and I need to take molds of my teeth.My concern is I have a cap on one of my front teeth and I don't know if I can take impressions with that in. I don't necessarily want to walk around with a giant gap.

My molds were taken on April 14. I am scheduled to have braces attached on June 6. Not sure, but I think my bottoms have shifted since April 14. Is this possible? What if molds have to be recast? Thanks.