If you’re getting a bridge on the right side is it necessary to do it on the left side?

This can go 2 ways... You could end up with a bridge that DOESN'T match your natural teeth and smile or you could end up with a bridge that DOES match your natural teeth and smile. The way to control which one you get is to do your research, find a dentist that does cosmetic dentistry and ask to see before and afters. If you get a few quotes, make sure that you are comparing pricing for an all-porcelain bridge. All-porcelain will produce the most natural results. Last, most likely your cheapest quote wont yield the most esthetic bridge. If you choose the right dentist, you wont need to put a bridge on the other side, but to make your teeth match. Hope this helps and Good Luck!
Dr. Patty AKA 

The bridge on your right  side should match how your teeth appear on your left side assuming your mouth is consistent on both sides  From a color matching standpoint, both sides should match. You definitely do not need to do anything to the teeth on the opposite side to make both sides match. I hope this helps!