Adhesive technology

The adhesive technique ( Latin : adhaerere , to stick) is a method in dentistry for the attachment of dental restorations using plastic. It is used for composite fillings and for cementing ceramic fillings as well as for cementing crowns , veneers (veneers) and adhesive bridges using composite and for sealing fissures . The principle is that a thin plastic ( adhesion promoter ) forms a bond between the hard tooth substance and the corresponding filling material.

differentiation

A distinction must be made between the adhesion promotion on the tooth enamel and the adhesion promotion on the dentine. Common to both is the prior application of an acid (usually phosphoric acid ).

Adhesion to the enamel

The application of the acid causes the tooth enamel to be etched, creating a microstructure into which a low-viscosity, unfilled or low-fill monomer mixture is introduced as an adhesion promoter and polymerized by means of light.

Adhesion to the dentin

The application of the acid on the dentin the dissolution of a smear layer caused ( engl. : Smear layer). At the same time, collagen is exposed by etching the apatite of the intertubular dentin. This is followed by the application of a primer (a priming liquid), which flows into the dentinal tubules and the colleague's plexus. An adhesive is then applied and polymerized using light.

Combination systems

Due to the further development of the materials (enamel-dentin adhesives), both adhesive effects can be brought about by a single procedure and a simultaneous adhesion to enamel and dentin can be created. There is a choice between one-step systems and four-step systems. The seventh generation of adhesion promoters is now in use.

method

The adhesive technique requires the tooth to be drained, for example with the help of a rubber dam . First, the required enamel, if necessary the dentin, is etched by applying an acid (usually 30 to 40 percent phosphoric acid in the form of an etching gel). The fine structure created in this way enables better wettability for the bonding agent (bond), which flows into the roughened structures and creates microretention after light curing using a polymerization lamp. If a bond with the dentine is also desired, the smear layer can be dissolved at the same time. After applying the primer and the adhesive and curing them with light, the actual filling material (composite) is applied in layers, which forms a chemical bond with the bonding agent and is light-curing. When used as a fastening material, self-curing composite is used.

Individual evidence

↑ Thomas Weber: Memorix dentistry . Georg Thieme, 2010, ISBN 978-3-13-114373-0 , p. 477 ( google.com ).
↑ Reinhard Marxkors, Jürgen Geis-Gerstorfer, Hermann Meiners: Pocket book of dental materials science: from defect to restoration; with 11 tables . Deutscher Ärzteverlag, 2008, ISBN 978-3-7691-3344-8 , p. 235-236 ( google.com ).
↑ Detlef Heidemann: Amalgam-free filling therapy . Elsevier, Urban & Fischer, 2001, ISBN 978-3-437-05040-4 , pp. 14- ( google.com ).
↑ Klaus M. Lehmann, Elmar Hellwig, Hans-Jürgen Wenz: Dental Propaedeutics: Introduction to Dentistry; with 32 tables . Deutscher Ärzteverlag, 2012, ISBN 978-3-7691-3434-6 , p. 164 ff . ( google.com ).

[Weber2010-1] Thomas Weber: Memorix dentistry . Georg Thieme, 2010, ISBN 978-3-13-114373-0 , p. 477 ( google.com ).

[MarxkorsGeis-Gerstorfer2008-2] Reinhard Marxkors, Jürgen Geis-Gerstorfer, Hermann Meiners: Pocket book of dental materials science: from defect to restoration; with 11 tables . Deutscher Ärzteverlag, 2008, ISBN 978-3-7691-3344-8 , p. 235-236 ( google.com ).

[Heidemann2001-3] Detlef Heidemann: Amalgam-free filling therapy . Elsevier, Urban & Fischer, 2001, ISBN 978-3-437-05040-4 , pp. 14- ( google.com ).

[LehmannHellwig2012-4] Klaus M. Lehmann, Elmar Hellwig, Hans-Jürgen Wenz: Dental Propaedeutics: Introduction to Dentistry; with 32 tables . Deutscher Ärzteverlag, 2012, ISBN 978-3-7691-3434-6 , p. 164 ff . ( google.com ).