Evaluación de la microfiltración en restauraciones indirectas de cerómero cementadas con: agente adhesivo dual, autoadhesivo y resina restaurativa precalentada

Abstract

The purpose of this study was to evaluate the microfiltration in indirect ceromer restorations Ceramage A1 Body (Shofu), cemented with a dual adhesive agent RelyX ARC (3M ESPE); with a RelyX U200 self-adhesive (3M ESPE) and a Filtek Supreme Z350 pre-heated restorative resin (3M ESPE) for 10 minutes at 55 ° C. The sample consisted of 60 third molars, in which mesio-occluso-distal MOD cavities with 3 mm depth and width (inlays) were performed. Impression was made with addition silicone and the restorations were made. The samples were divided into groups of 20; the first group was cemented with dual adhesive agent, the second group with self-adhesive and the third with pre-heated restorative resin, following the manufacturer's instructions. All samples were photocured with Optilux 501 halogen light (SDS Kerr) at 1020 mw / cm2, for 40 sec. each surface , then were subjected to 10,000 cycles Introducción Las restauraciones indirectas en el sector posterior se han convertido en la mejor opción cuando la destrucción coronal es amplia y compromete una cara proximal, ya que las restauraciones directas tienen mayor índice de contracción, formando espacios entre la interfase de la estructura dental y la resina, dando paso a la microfiltración, siendo éste un fenómeno dinámico que provoca pigmentación marginal, caries secundaria, sensibilidad post operatoria, lesiones pulpares, y fallas en la adhesión (1) (2) (3). Es así que el uso de restauraciones indirectas se popularizó a partir de 1980, ya que presentan mayor control en su polimerización, por lo tanto mejor contorno anatómico y proximal, estética y cualidades de pulido (4) (5). Su uso está indicado cuando no hay paredes proximales, cuando la altura del piso a cúspide es de 1.5-3 mm o cuando la medida entre cúspides es la mitad de la totalidad de las misma. (6) Uno de los varios materiales que se utilizan en una restauración indirecta es el cerómero, por su biocompatibilidad, sin embargo la técnica de cementación se vuelve un protocolo susceptible. En el mercado existen diferentes tipos de cemento a base de resina que han probado tener una alta resistencia en restauraciones de composite; ya que se caracterizan por ser resilentes, tienden a deformarse y a absorber fuerzas de tensión. (7) (8) of thermocycling and submerged in 2% basic fuchsin for 24 hours at room temperature. Macro- photographies were taken of the MOD surfaces and marginal microfiltration was evaluated in ranges from 0 to 4 between the inlays and the dental structure; 0 being the one that does not present any pigmentation and 4 presence of cracks. It is concluded that the samples that have lower marginal microfiltration are cemented with preheated restorative resin, followed by cemented with the dual adhesive agent and finally those cemented with self adhesive. In addition, the surface with the lowest microfiltration was the occlusal, followed by the mesial and finally the distal surface in all cases