hi jane, i see many of the dentists have answered most of the questions you asked regarding the invisible braces. for my own patients undergoing the invisible brace treatment for the first few days of each new alligner i always recommend the use of pain killers such as paracetamol, this really helps.
if you require any further assistance please do not hesitate to contact me.
Dr Kailesh Solanki.
kissdental
www.kissdental.co.uk