Kate - as someone that used to own a dental prosthetic lab and is very familiar with the steps it takes to prep teeth, take impressions have the lab cast a metal substructure, build porcelain on it and then the last appointment to cement it, the timeline that you are considering may not be doable unless you can convince all the parties involved to pull out all the stops and get the lab to turn the prosthesis around in a couple of days. It's not impossible, and an understanding laboratory owner could pull out all the stops and get this done. If so you are just down to scheduling at the dentists office that is going to prep the teeth, take impressions and cement the final restoration. Other concerns would be that the tissue under the pontics ( false teeth in the middle of the bridge) is gong to change shape during the healing process, and a natural illusion of those resting against the tissue might be compromised if al this is done too soon. In the lower anterior month this is no concern at all as you cannot see that area when people talk or smile... but is is an area that if there are big gaps under the bridge between it and the tissue that they become food traps later and hard to keep clean and health when foods that are eaten pack into that space.

Me, I am less concerned about a prosthetic appliance that can be made after treatments, than I am of getting the necessary extractions done and that area healed before treatment begins. That is essential, restoration can happen down the road. Delaying treatment for prosthetics just allows the cancer to grow further and obviously that is more of a concern than temporary esthetics.

And to comment on the above, they cannot make an impression till some dentist preps (cuts down) the abutment teeth to accept crowns on top of them that are going to support this whole thing when it is made. Also I have never heard of a "flexible" bridge as everything out there is a metal subtraction with acrylic or porcelain coatings. Anything flexible to me means removable and temporary. So a plastic prosthesis that can be put in for esthetics could be made relatively quickly, but on lower anterior teeth he will not be able to eat with it and it will just be there for social occasions. Biting with the front of your mouth, which we all do, would create a lever pressure on it and it would just dislodge. So this is a transitional or temporary solution to wear while a permanent rigid bridge is being made for the most part. People with the inability to afford fixed bridgework may live with this kind of acrylic device for many years.