Is it easy for a dentist to tap off a dental bridge that's cemented permanently if he needs to do it?

Not really: Crown and bridges that are cemented permanently are not designed to be removed. The usual method of removal is cutting the bridge (and thus destroying it) to remove it in an effort to prevent damage to the underlying teeth. If any of the abutments have had root canal therapy, the are brittle and can fracture quite easily. You're better off remaking the bridge.

Bridge removal: A lot depends on what the bridge is made of and what it was cemented with. All ceramic bridges have a poor record of removal with out damage to tooth or bridge. Usually they need to be cut off and remade if removal is mandated. Porcelain fused to metal bridges have a better record of removal but the better the original cement the less likely the tooth will survive with out fracture. T

Permanent cement: depends on a number of factors, number of teeth holding bridge in , type of material , and cement used.....some permanent cements can be made to be retrievable, which can be employed if we want the patient to road test the prosthesis. That is strictly a clinical choice of the dentist, meaning he/she isn't doing anything wrong if they choose not do so.

Not recommended: If the force is used to tap off the bridge, you may run the risk of damaging one of the teeth holding the bridge.