Can the top of my bottom teeth be bonded, and how much wound it cost? There are a total of 6 on the bottom and 1-2 on the top.

Sorry about your condition...Bondings on lower front teeth on the biting edge is "iffy" at best since the material used is not quite as resistant to wear as porcelain..It would just add to your problems to bond and have them wear away or fracture sooner than later...Need more info like photos, models etc.  A bite guard would be an interim solution to slow down wear until you are ready to attack this with a good cosmetic rehab dentist. Good luck

I am so sorry for your situation--without photos it is hard to be certain but in general--if you are having spacing occur many times an option is to close the gaps using bonded composite--you also want to find out why the change is happening--it can be from weakening bone or bite changes and many other causes--you would want to get those factors under control as well so the spacing does not continue to worsen. Good Luck to you.