Dental Implant Bridge vs Crown?

Every situation where one has to fill the missing tooth space is unique and needs a number of considerations addressed to find the right answer. You sound like you have had ongoing trouble with failing crowns (that problem may need to be addressed separately by your dentist). 

In your situation, if the teeth are strong enough, a bridge is still a good solution. It's a relatively fast process-like the crown making process that you have had before. IF you are having on-going problems around your crowns, then having a bridge only ups the ante for future problems, as whatever problem happens to one part of the bridge, then affects all three teeth in the bridge.

Implants are less susceptible to cavities under crowns, so that may lower your overall risk and increase the longevity of your dental work. You sounds like you have a good specialist. This is probably the right direction. Make sure to discuss your specific fears with them so they can find a way to make you comfortable.

Today, it's often better and less expensive long term to have successful implants rather than complicated dentistry on questionable teeth. Dentists usually try not to combine implants and teeth with bridges, but I have seen cases where this was successful. A second opinion would be a good idea here since it's impossible to be more specific without an exam and x-rays.