The short answer is yes, resin bonding can help; however, plastic will not mask dark discolouration as well as porcelain veneers. I hope that helps!
It is sometimes done to preserve the bone. Once the root is extracted, the bone will resorb and your denture may no longer stay in well.
Those teeth probably need crowns if they are not too badly decayed. It's always impossible to state definitively what can be done without doing a thorough examination to evaluate the state of the gums and decay. Good luck!
