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presented By : Seyed Kianoosh Emamzadeh

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Dentin Histology

Dentin Tubules

PeritubularDentin

IntertubularDentin

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Conditioner

Mild acids

E.g.: 10- 40 %Phosphoric Acid

EDTA

10% Nitric acid

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Conditioner Function:

Remove Smear Layer/Plug Partially dissolve Peri/Intertubular dentin

Micro porosity

around tubules

Open dentinal tubules

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Conditioner Function

1!

2!

3!

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PrimerE.g.: HEMA in solvent

Ethanol

Acetone

Coupling Agent : Bond

HydrophobicResin Bonding

Agent

HydrophilicDentin

Clear away waterallowing betterPenetration of Primer

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Resin Bonding AgentE.g.: Unfilled resin : bis-GMA

ChemicallyTo Resin restoration

Micro mechanicallyTo Dentin

R

esin Tag

Hybrid Zone

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No Questions? Great!!

References:Dentine Bonding Systems: 1. Mode

of Action

F.J.T. BURKE, E.C COMBE ANDW.H. DOUGLAS