[Actual facial points as indication for bonded bridges]

The results of recent long-term investigations show that the failure rates of adhesive bridges vary between 0% and 50%. Since only a few clinical and material effects--which in some cases are contradictory--on the success or failure could be definitively detected so far, establishment of the indication is of particular importance: Three-unit bridges have proved to have the best prognosis at present. There are no significant differences between the regions of the front and side teeth and between the upper and lower jaw. Abutments loosened to various degrees increase the risk as well as the parafunctional strain on abutments and the bridge. Caries and gingivitis is rarely observed in patients with adhesive bridges. This is due to the follow-up care practised in the studies and by no means obviates the need for regular checks of hygiene.