Reflections about Adhesive Systems

Abstract

The adhesive systems are responsible for an efficient union between teeth and resin, resulting in a longevity restoration. They are organic molecules di or multifunctional that contain reactive groups that interact with dentin and with the resin monomer of composite resin. The adhesive systems are characterized by wet adhesion, which is a result of presence of hidrophylics radicals in their compositions, to promote a better bond and the best properties of the adhesion. Adhesive systems may use two different strategies to interact with the dental structure: total-etching and self-etching technique. The total-etching systems require a conditioning, a rinsing and a priming step in order to allow involvement of collagen fibers by the resin monomers and the formation of the so-called 'hybrid layer'. The total-etching promotes the cleaning of dentin, also promotes superficial demineralization and delivers collagen fibrils to participate of an interface union mechanism teeth/ adhesive system/restorative material. Self-etching adhesive systems are characterized by demineralization and infiltration of resin monomers simultaneously. This technique is attractive because reduced sensitivity associated with retaining the smear layer and smear plugs, thereby, minimize the possibility of inadvertent contamination of the bonding surface with dentinal surface through dentinal fluid transudate. B. M.; DIESEL, G. P.; CORRÊA, G. F.; BERNARDI, E.; FERNANDES M. A.; SKUPIEN, J. A. & SUSIN, A. H. Reflections about adhesive systems. DE FREITASInt. J. Odontostomat., 4(1):47-52, 2010.

Efecto de los diferentes tiempos de grabado ácido sobre la resistencia de unión de un sistema adhesivo autoacondicionante en esmalte bovino

“…Se caracterizan por adherirse en medios húmedos, producto del resultado de la presencia de radicales hidrofílicos en sus composiciones, para promover una mejor adherencia y mejores propiedades adhesivas. 1,2 Para que pueda existir una mejor resistencia de unión en una restauración dental el acondicionamiento ácido es un paso fundamental, debido a que se encarga de desmineralizar la superficie del esmalte creando microporos que proveerán un mayor anclaje, sobre todo en restauraciones dentales poco retentivas, superficiales o adhesivas. Se pueden utilizar dos estrategias diferentes para interactuar con la estructura dental: Sistemas adhesivos convencionales y autoacondicionantes.…”