[Cantilever resin-bonded bridges with one adhesive surface. A review of the literature].
Conventional resin-bonded bridges are designed with adhesive surfaces on both sides of the dummy. As a consequence both abutment teeth are rigidly connected to each other. Loading of the abutment teeth or dummy will lead to wringing forces in the cement. Adhesive bridges with one adhesive surface are actually cantilever bridges. Theoretically this type of bridges will be less prone to wringing forces due to loading. However, long term research into the performance of cantilever resin-bonded bridges (RBBs) is hardly available. The results of research into the longevity of conventional RBBs differ remarkably between Europe, and the United States and Japan. These difference are discussed in this article. This article compares the fixed-fixed design RBBs with the cantilever RBBs. The differences are discussed based on eight articles, the earliest being published in 1991, which are dedicated, completely or partially, to the subject of cantilever adhesive bridges. One can conclude that in The Netherlands RBBs are wrongly considered to be unreliable. On the contrary, they appear to be reliable and predictable restorations provided their preparations meet the right standards. Although a number of authors conclude that cantilever RBBs are performing better than their fixed-fixed design counterparts in similar situations, further research is needed concerning the longevity of this type of adhesive bridges.
Afdeling Tandheelkundige Basiswetenschappen, sectie Tandheelkundige Materiaalwetenschappen van het Academisch Centrum Tandheelkunde Amsterdam (ACTA), Louwesweg 1 1066 EA Amsterdam. a.dalen@acta.nl
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D000044:Dental Abutments; D001840:Dental Bonding; D003779:Denture Design / Q000592:standards; D016379:Denture, Partial, Fixed, Resin-Bonded / Q000592:standards; D006801:Humans; D013314:Stress, Mechanical; D013997:Time Factors; D016896:Treatment Outcome