- Higher maintenance: TRMs ordinarily have to have more diligent cleaning than MADs due to their distinct layout. An implant supported bridge (or preset denture) is a group of teeth secured to dental implants And so the prosthetic can't be removed by the person. These are equivalent to traditional bridges, https://crown-and-bridge.full-design.com/5-simple-statements-about-removable-prosthetics-explained-75171631