This document discusses dental adhesives and their evolution over several generations. It describes improvements in adhesion to dental structures and materials, including the development of self-etching adhesives and single-component adhesives. The document also covers adhesive components, properties, application techniques, advantages and disadvantages. Key adhesive types discussed include etch-and-rinse systems, self-etch adhesives, and light-cured or dual-cured formulations. Diagrams and tables supplement the text.

1. FIG. 1
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FIG.2
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2.  It is an innovative, modern
achievement of dentistry, which
allows aesthetic results, generally,
that previously could not be
achieved.
FIG.3
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3.  Restorations with important
achievements:
Aesthetic
Biological
Functional
 Being able to adhere does not only resin,
but also structures ceramics to dental
tissue.

4.  Induction of oral fluid and bacteria in
microscopic fissures that exist between the
surface of the prepared tooth and the
restorative material

5.  In amalgam: produces no continuity between
the two structures, but over time the interface is
sealed, since it produces corrosion products
that seal.
 In ionomer: fluoride is released which
prevents recurrent caries.
 In resins: the direct filling are inert, do not
produce marginal seal, therefore we must seek
other methods of achieving marginal seal.

6. Some may be polymerized only
with the components included
in its composition:
There are auto polymerizing,
self-curing, or chemical
activation.
FIG.5
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7. Others need a light
generating device to be
cured: they are the
photopolymerizable, light
photocurable or activation
(with light).
FIG. 4
Self-etching adhesive system
photocurable of a single
component for the dentin and the
enamel which releases fluoride.
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8. FIRST HYDROPHOBIC
SECOND MIXED
THIRD HYDROPHILIC
FOURT HYBRID LAYER
FIFTH SINGLE COMPONENTS
SIXTH ETCHING
SEVENTH ALL IN ONE

9.  FIRST: Before 1980. Without conditioning on
dentin. It had very low adhesion values ​in dentin:
2-7 MP, the enamel MP 24-27.
 SECOND: 3 times greater adhesion to dentin and
enamel 30-50%.
 THIRD: They generate bond strength similar to
that between enamel and resin. It was only trying
to produce a chemical bond, subsequently
obtained a micro mechanical junction, by forming
an interdiffusion layer which leads to high levels
of adhesion.

10.  FOURTH: Adhesion greater than 20 MP
 FIFTH: Based on hybridization dentin
layer. Easier use than previous. Resistance
similar to those of the fourth generation.
 SIXTH: It begins to use primers etching
and mixtures of adhesives with primers and
phosphoric acid is removed except for the
sound enamel.
 SEVENTH: Among the improvements we
can mention the self-etching adhesives and
those which do not require mixing.

11. MECHANICAL OR PHYSICAL
 Exclusively for one mechanical locking.
It is based on morphological features of
the parts (Grasp) and may be at levels:
 Macromechanic: undermined
 Micromechanic: differs from the
previous one in the size of the parts.

12.  Forces are generated between both parts. They
are interactions at atomic level or molecular,
based on primary joints (chemicals: ionic,
covalent, metal) and secondary (hydrogen
bridges and oscillating dipoles). The ideal is for
primary joints to be produced.

13.  BIS.GMA Bisfenol-glicidil-metacrilato
 HEMA 2 Hidroxidi-etil-metacrilato
 TEG.DMA Tri-etilen-glicol-glicidil-metacrilato
 PEG.DMA Polietilen-glicol-dimetacrilato
 GPDM Gilcerol-propano-dimetacrilato
 DMA Dimetacrilatos
 MMPAA Poliacidos-dimetacrilato-modificado
 UDMA Dimetacrilato de Uretano
 HPMA Hidroxidi-propil-metacrilato
 BPDM Bifenil-dimetacrilato
 4-META 4-metacril-oxi-etil-trimelitato-anhibrido
 PENTA Ester-fosfonato-penta-acrilato

14.  Low service tension
 Low Viscosity
 Dimensional Stability
 Adequate Mechanical Properties: to resist
forces of mastication
 Hydro resistance
 Biological Compatibility

15.  High surface energy to attract the liquid
so that it can be drained. In order for
that, it is necessary for it to be clean with
a smooth surface (favors the chemical
union but not the mechanical). This is,
the surface must be wettable by the
adhesive.
FIG.4
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16. NAME COMMERCIAL SOLVENT CURING TIME
HOME
TETRIC N IVOCLAR ETHANOL 10 SEC.
BOND VIVADENT
PRIME & DENTSPLY ACETONE 10 SEC.
BOND NT
ONE COAT COLTENE WATER 30 SEC.
BOND SL
TE-ECONOM IVOCLAR ETHANOL 20 SEC.
BOND VIVADENT
ADPER 3M ETHANOL 10 SEC.
SINGLE
BOND 2

17. Retain most of the
tooth structure
Achieve a lasting
and optimal
retention
Prevent
microleakage

18.  Photopolymerizable (marginal percolation)
 Auto curing
 Dual, Auto or phtocuring

19. ADVANTAGES DISADVANTAGES
Increase tooth retention and effort There is a greater chance of dentin
overmineralize
Higher marginal adaptation Need of long clinical time
Lower percentage of secondary Possibility of contaminating dental
decay structure
Decrease in sensitivity Major risk of over drying the dental
tissue or chance of moisture in the
substrate adherent

20.  3M
 Bisco
 Kerr
 Dentsply
 Kuraray
 Jeneric
FIG: 5
 Vivadent www.dentsply.es/adhes
ivos/XenoV.htm

21.  www.universodontologico.com.ar/pacientes/preguntas/adhe
sion.htm
 3.bp.blogspot.com
 www.rincondelvago.com/adhesivos-dentales.html
 www.slideshare.net
 http://www.scielo.org.ve
 https://docs.google.com/viewer?a=v&q=cache:qxouJGTtQrUJ
:www.idap.com.mx/apuntes/Materiales%25
 https://docs.google.com/viewer?a=v&q=cache:oEYB9SZmiZQ
J:www.dentaladvisor.com/viewer?a=v&q=cache:oEYB9SZmiZ
QJ:www.dentaladvisor.com/publications/the-dental-advisor/