Contaminación de la dentina con diferentes técnicas de secado / Contamination of dentin with different drying techniques

El secado es uno de los factores clave para lograr una adhesión micromecánica exitosa en la dentina con los sistemas adhesivos de grabado independiente. El objetivo de este trabajo fue comparar los residuos remanentes luego de cuatro procedimientos diferentes de secado en preparaciones ex vivo en dentina. Se utilizaron cinco terceros molares ex-vivo, en cada uno de los cuales se realizó una preparación dentinaria en piso y paredes con al menos un socavado. Las unidades experimentales fueron almacenadas en solución fisiológica durante 7 días. Las distintas técnicas de secado (G1- G8) se aplicaron, luego de que las preparaciones fueron tratadas con gel de ácido fosfórico al 37% (Blue Gel etch Megadental) durante 15s y lavadas con jeringa y agua a presión durante 15s (Técnica de Grabado Ácido o TGA), de la siguiente manera: algodón común (Condesa) (G1), papel tisú (Achiss) cortado a mano (G2) y con tijera (G3), esponja (Sharpys) (G4), papel tisú (Simplicity) cortado a mano (G5)(AU)

Effect Of Saliva Contamination And Different Decontamination Modes On Dentin Bond Strength During Bonding With Single Bottle Adhesive.

The objective of the present study is to evaluate the different mode of decontamination of saliva on dentin bond strength. Buccal/lingual surfaces of 48 extracted human molars were wet ground to create flat dentin surface, to serve as bonding area for single bond and the hybrid composite resin. The experimental teeth were then categorized into six groups of 8 teeth each and treated in the following manner. Group 1 control (without contamination), Group 2 etched surface is contaminated with saliva and saliva is decontaminated by air drying. Group 3 etched surface is contaminated and saliva was decontaminated by rinsing and blot drying.group4 uncured adhesive surface contaminated, saliva is decontaminated by rinsing and blot drying. Group 5 cured adhesive surface is contaminated, decontamination of saliva was done by rinsing and air drying. Group 6 treated similar to Group 5 with additional adhesive application after air drying. All teeth were mounted in iron mould and subjected to universal testing machine for shear bond strength. Lowest mean bond strength was found in Group2 which was significantly lower than all other Groups (p<0.01). Group5 and Group6 were significantly lower than Group1, 3 and 4. Based on this study it was found that one bottle adhesive systems are less sensitive to salivary contamination in contrast to previous generation adhesives.