I may be facing the decision in the future to bridge or not to bridge. The down-side is having two good teeth on either side ground down to little points. One has an Amalgam filling. I don't feel good about posts in bone as an alternative -- I don't want to compromise the bone, but I also don't want to lose two good teeth and have an Amalgam filling removed, possibly leaving mercury residues.
I still have a baby tooth with almost no root left. If it can hang in there for me, I won't have to make this decision.