Usually 90% of patient do not need any pain killer.

to get perdictable results; Midligner recommends to wear aligner for 22 hours in daily basis during the treatment, to get best results.

Brush with warm water and soap.

They made out of composite, which bonds to the teeth, to allow movement with aligners (most of the cases use attachments).

Use same process of applying braces, so it is very simple process; no drilling, No Needle, just glow on the aligner.

IPR is inter proximal reduction, used in most cases to create space between teeth, when having crowded cases; it is usually replacing teeth extraction.

Any thing that you put on mouth will certainly affect the speech, but it takes couple of days maximum, to get back to normal.

Nothing as far as you take aligner off during that time and cleaning your teeth after, then you re-put it on.