There are four considerations that I have when evaluating patients as candidates for
1). DRBB’s are best intended for the missing lateral or central incisor, though I have had some success when replacing canines and bicuspids.
2) Mobile or loose teeth as abutments are not ideal for any resin bonded bridge. While I have used DRBB’s where there is a missing anterior tooth and some mobility, my preparation design must be more aggressive and must have internal preparation for the resin reinforced fiber material.
3) Splayed, or flared anterior teeth are poor candidates for DRBB’s and either Zirconia or LiDi RBB’s should be used in these cases. When teeth are flared, the bite force vectors in chewing and function are different on each of the abutment teeth. As such, with these opposing vectors, there will be stresses on the adhesive bond with these minimally prepped bridges.
4) Heavy bruxers damage their teeth and dentistry equally. The same considerations on vector forces need to be considered as with the flared teeth when patients are heavy grinders. For my patients that are heavy grinders, night guard use is paramount for long term success of their DRBB’s. For patients that are daytime clenchers and grinders, there must be correction of their behaviors to ensure prosthesis success.