[Retention of adhesive bridges].
Since the development of adhesive bridges in the early seventies, the retention and therefore the durability of these bridges has been tremendously improved. To ensure an adequate retention over a number of years different factors have to be considered. Conditioning of the non-precious metal by silanisation, careful acid etching of the enamel and the use of the appropriate composite resin (Panavia Ex) are of prime importance. Furthermore, the meticulous preparation with enough interproximal embrace, occlusal rets, interocclusal clearance of 0.4 mm and cingulum stops is equally important. Care should be taken not to remove all the enamel in the cervical region in preparing a mini chamfer. Including more teeth in the design does not necessarily lead to an improved retention. Teeth with a different mobility should not be included in the same bridge. Besides the material and technical aspects, the whole clinical procedure needs much attention. Only an exact impression, a precise model and a reliable casting technique will provide a metal frame with an optimal marginal adaptation and a close fit. The retention does not depend on one single factor but on the precision of all the necessary clinical steps and on a well-defined selection of the material. In this way a five-year survival rate of close to 90% can be obtained.
Raes
F
F
Service de Prothèse et de Parodontologie, Kliniek voor Tand-, Mond- en Kaakziekten, Rijksuniversiteit Gent.
De Boever
J
J
D000134:Acid Etching, Dental / Q000592:standards; D003188:Composite Resins; D003735:Dental Casting Technique; D003781:Denture Retention; D003830:Denture, Partial, Fixed; D006801:Humans
D003188:Composite Resins
La rétention des bridges collés.