My dental bridge broke 10 days ago. I want perfect fitted new one?

so, I want to know if cad/cam technology is the real solution , and will I need a new teeth preparation for my new bridge, or retraction cord is well enough to "open" the gums?

My dental bridge broke 10 days ago. I want perfect fitted new one?
To begin with Cad-cam is a trade name and the products are very good, they work, but are subject to a failure at some point just like any other product or system. If the tooth stumps have not broken or have decay, there is no reason to assume that additional tooth preparation by grinding would be required. If however a piece of the bridge crown is still attached and won't pop off, it may have to be removed by grinding. As for the gum tissue around the base of the tooth prep, epinephrine impregnated string can be applied to stop bleeding and create a space that allows a complete and accurate impression to be made. Once that is accomplished the new bridge can be created.....