
y 1, comparado con la técnica de
autograbado donde predominó el grado 1
y 2.
PALABRAS CLAVE: microfiltración,
adhesión, adhesivos autograbantes, resina
compuesta, termociclado.
ABSTRACT
The adhesive systems seek as their main
goal, to obtain a complete interaction with
the dental structure that provides high
adhesion strength, satisfactory sealing,
good marginal adaptation and less
microleakage of bacteria, fluids, molecules
or ions between the walls of the cavity
preparation and restorative material. The
objective was to evaluate in vitro the
degree of microleakage of composite resin
restorations, using three different
trademarks of self-etching adhesive
systems, comparing two techniques: with
selective etching in enamel and with self-
etching technique, performing artificial
aging at various temperatures. The sample
consisted of 70 premolars divided into
three groups of 20 samples plus a control
group of 10 samples, the Tetric N-Bond
Universal (Ivoclar), Prime & Bond Universal
(Dentsply), One Coat adhesives were used 7
Universal (Coltene), applying two adhesive
techniques: selective enamel etching
technique and self-etching technique. The
control group with the three-step total
etched technique with the Optibond FL
(Kerr) adhesive system. The thermocycling
process was 500 cycles of 55 ° C, 37 ° C and
5 ° C and microleakage was detected by
penetration of 2% Giemsa staining and
observed with a stereomicroscope.
Statistically there were no significant
differences (p≥0.05) between both
adhesive techniques. A greater quantity of
dental pieces was recorded without
microleakage in group 1 with selective
etching technique. It is concluded that the
enamel selective etching technique
presented minor microleakage
predominantly grades 0 and 1, compared to
the self-etch technique where grade 1 and
2 predominated.
KEYWORDS: microleakage, adhesion, self-
etching adhesives, composite resin,
thermocycling.
INTRODUCCIÓN
Los sistemas adhesivos buscan como meta principal, obtener una completa interacción con la
estructura dental que logre proporcionar alta fuerza de adhesión, sellado satisfactorio, buena
adaptación marginal y menor microfiltración de bacterias, fluidos, moléculas o iones entre las
paredes de la preparación cavitaria y el material restaurador. (1-3)
Los adhesivos autograbantes, implican un procedimiento menos sensible a la técnica, ya que
realizan la adhesión sin la necesidad de lavar los monómeros ácidos y así controlar la humedad
de la cavidad dentaria. (2,8)
Estos sistemas actúan de manera que acondicionan, desmineralizan e infiltran el esmalte y la
dentina de forma simultánea, por lo tanto, la capa de barrillo se altera, pero no se elimina y no
está indicado el lavado. El objetivo de estos adhesivos autograbantes es reducir la profundidad
de la capa desmineralizada formando una capa más homogénea, regular y delgada
favoreciendo una penetración completa del adhesivo. (4)