Is the composite bonding material dentists put on chipped front teeth supposed to shrink over the course of one day?

You have a great looking smile.  Some minor shaping of the central incisors and canines will be magical in your case, as this will give the a much closer mirror image of symmetry to the left and right side of the smile.This is done without any need for local numbing injections and when done...

Your teeth really shouldn't hit. It sounds like having a simple adjustment on your retainer would probably solve the problem. Call for an appointment and they should be able to do it quite quickly and easily

The cost will depend on the region and the dentist that does the work.  I would recommend 4-6 veneers across the front to fix your top arch of teeth.  Bonding will generally be just a temporary fix because it easily stains and chips.  Good luck and I hope this helps. Follow me if...

By both the ways u can close the gaps. but better option is bonding . veneers is the option for whole tooth not only for the sides. for sides go for bonding.BUT REMEMBER , closing gap by bonding/veneers will change golden ratio of teeth [u may feel big bulky teeth after restorations]. so braces...

Direct bonding , single visit required , economical option, *good hands will charge more

It is not uncommon to get dark spaces between teeth, from gum recession, braces, Invisalign, etc.  Many solutions can be considered "aggressive" or time consuming/expensive.  Bioclear allows a conservative solution in a single visit and usually without removing any tooth structure.