In clinical practice, the prognosis seems, with some reservations, to be comparable for tooth-implant and implant-implant supported bridges in the middle-long term. This conclusion seems particularly valid for tooth-implant bridges in free-end situations, where a single implant is connected with a tooth. Prerequisites are a healthy tooth abutment, a pontic length not exceeding the width of a bicuspid, a rigid connection between implant and tooth and the use of permanent cement.