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BONDING AGENT - Coggle Diagram
BONDING AGENT
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Bonding to Dentine
bonding to dentin is more difficult than enamel due to its non homogenous structure and high water content.
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fluid present in dentinal tubules constantly flows outward from pulp which reduces the adhesion of the composite resin
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over dry
collapse of collagen fibre network which results in low bond strength because of ineffective penetration of the adhesive into the dentin
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by etching dentin, the smear layer and minerals from it are removed, exposing the collagen fibres.
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water keeps collagen fibrils from collapsing, thus helping in better penetration and bonding between resin and dentin.
Requirements for bonding
Clean adherent
Remove plaque, pellicle and smear layer will increase surface energy
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Bonding
physical, chemical, mechanical
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