Smear Layer-Deproteinization: Improving the Adhesion of Self-Etch Adhesive Systems to Caries-Affected Dentin

Keiichi Hosaka; Taweesak Prasansuttiporn; Ornnicha Thanatvarakorn; Sitthikorn Kunawarote; Masahiro Takahashi; Richard M. Foxton; Junji Tagami; Masatoshi Nakajima

doi:10.1007/s40496-018-0185-z

Smear Layer-Deproteinization: Improving the Adhesion of Self-Etch Adhesive Systems to Caries-Affected Dentin

Keiichi Hosaka, Taweesak Prasansuttiporn, Ornnicha Thanatvarakorn, Sitthikorn Kunawarote, Masahiro Takahashi, Richard M. Foxton, Junji Tagami, Masatoshi Nakajima^*

^*Corresponding author for this work

Centre for Oral, Clinical & Translational Sciences

Research output: Contribution to journal › Review article › peer-review

14 Citations (Scopus)

Abstract

Purpose of review: This paper reviews a new method of dentin surface modification, smear layer-deproteinization for self-etch adhesive systems, particularly in relation to improving the adhesion to caries-affected dentin. Recent Findings: Remnants of smear debris, which forms hybridized smear layer with self-etch adhesives, can prevent monomer infiltration and interfere with the chemical interaction of adhesive monomers and the underlying dentin. The hybridized smear layer weakens the physical and chemical properties of the resin-dentin hybridized complex both immediately and over time. Smear layer-deproteinization with NaOCl and HOCl solutions can improve the quality of resin-dentin interface of self-etch adhesives through elimination of the hybridized smear layer, development of monomer infiltration, and enhancement of the chemical interaction of adhesive monomers with hydroxyapatite due to an increase in the mineral/organic ratio on the dentin surface. These positive effects are influenced by the types of oxidizing solution and their application time and also depend upon the adhesive materials used because compromising effects of residual oxidized-byproducts at the dentin surface on the polymerization behavior of the adhesives are different between the materials. However, applying antioxidant/reducing agents can eliminate this problem. Summary: Smear layer-deproteinization is more effective for improving the bonding efficacy of self-etch adhesives to caries-affected dentin than normal dentin because caries-affected dentin produces a thicker organic-rich smear layer. Smear layer-deproteinization with HOCl solution, which has a rapid and broad-spectrum antimicrobial activity with less irritating and sensitizing properties, along with the subsequent application of antioxidant/reducing agents could enhance the longevity of composite restoration with self-etch adhesives.

Original language	English
Pages (from-to)	169-177
Number of pages	9
Journal	Current Oral Health Reports
Volume	5
Issue number	3
DOIs	https://doi.org/10.1007/s40496-018-0185-z
Publication status	Published - Sept 2018

Keywords

Antioxidant/reducing agent
Caries-affected dentin
Oxidizing solution
Self-etch adhesive
Smear layer
Smear layer-deproteinization

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10.1007/s40496-018-0185-z

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@article{2a36c577e34d4ab38f7f5a10a0afb746,

title = "Smear Layer-Deproteinization: Improving the Adhesion of Self-Etch Adhesive Systems to Caries-Affected Dentin",

abstract = "Purpose of review: This paper reviews a new method of dentin surface modification, smear layer-deproteinization for self-etch adhesive systems, particularly in relation to improving the adhesion to caries-affected dentin. Recent Findings: Remnants of smear debris, which forms hybridized smear layer with self-etch adhesives, can prevent monomer infiltration and interfere with the chemical interaction of adhesive monomers and the underlying dentin. The hybridized smear layer weakens the physical and chemical properties of the resin-dentin hybridized complex both immediately and over time. Smear layer-deproteinization with NaOCl and HOCl solutions can improve the quality of resin-dentin interface of self-etch adhesives through elimination of the hybridized smear layer, development of monomer infiltration, and enhancement of the chemical interaction of adhesive monomers with hydroxyapatite due to an increase in the mineral/organic ratio on the dentin surface. These positive effects are influenced by the types of oxidizing solution and their application time and also depend upon the adhesive materials used because compromising effects of residual oxidized-byproducts at the dentin surface on the polymerization behavior of the adhesives are different between the materials. However, applying antioxidant/reducing agents can eliminate this problem. Summary: Smear layer-deproteinization is more effective for improving the bonding efficacy of self-etch adhesives to caries-affected dentin than normal dentin because caries-affected dentin produces a thicker organic-rich smear layer. Smear layer-deproteinization with HOCl solution, which has a rapid and broad-spectrum antimicrobial activity with less irritating and sensitizing properties, along with the subsequent application of antioxidant/reducing agents could enhance the longevity of composite restoration with self-etch adhesives.",

keywords = "Antioxidant/reducing agent, Caries-affected dentin, Oxidizing solution, Self-etch adhesive, Smear layer, Smear layer-deproteinization",

author = "Keiichi Hosaka and Taweesak Prasansuttiporn and Ornnicha Thanatvarakorn and Sitthikorn Kunawarote and Masahiro Takahashi and Foxton, {Richard M.} and Junji Tagami and Masatoshi Nakajima",

year = "2018",

month = sep,

doi = "10.1007/s40496-018-0185-z",

language = "English",

volume = "5",

pages = "169--177",

journal = "Current Oral Health Reports",

issn = "2196-3002",

publisher = "Springer",

number = "3",

}

TY - JOUR

T1 - Smear Layer-Deproteinization

T2 - Improving the Adhesion of Self-Etch Adhesive Systems to Caries-Affected Dentin

AU - Hosaka, Keiichi

AU - Prasansuttiporn, Taweesak

AU - Thanatvarakorn, Ornnicha

AU - Kunawarote, Sitthikorn

AU - Takahashi, Masahiro

AU - Foxton, Richard M.

AU - Tagami, Junji

AU - Nakajima, Masatoshi

PY - 2018/9

Y1 - 2018/9

N2 - Purpose of review: This paper reviews a new method of dentin surface modification, smear layer-deproteinization for self-etch adhesive systems, particularly in relation to improving the adhesion to caries-affected dentin. Recent Findings: Remnants of smear debris, which forms hybridized smear layer with self-etch adhesives, can prevent monomer infiltration and interfere with the chemical interaction of adhesive monomers and the underlying dentin. The hybridized smear layer weakens the physical and chemical properties of the resin-dentin hybridized complex both immediately and over time. Smear layer-deproteinization with NaOCl and HOCl solutions can improve the quality of resin-dentin interface of self-etch adhesives through elimination of the hybridized smear layer, development of monomer infiltration, and enhancement of the chemical interaction of adhesive monomers with hydroxyapatite due to an increase in the mineral/organic ratio on the dentin surface. These positive effects are influenced by the types of oxidizing solution and their application time and also depend upon the adhesive materials used because compromising effects of residual oxidized-byproducts at the dentin surface on the polymerization behavior of the adhesives are different between the materials. However, applying antioxidant/reducing agents can eliminate this problem. Summary: Smear layer-deproteinization is more effective for improving the bonding efficacy of self-etch adhesives to caries-affected dentin than normal dentin because caries-affected dentin produces a thicker organic-rich smear layer. Smear layer-deproteinization with HOCl solution, which has a rapid and broad-spectrum antimicrobial activity with less irritating and sensitizing properties, along with the subsequent application of antioxidant/reducing agents could enhance the longevity of composite restoration with self-etch adhesives.

AB - Purpose of review: This paper reviews a new method of dentin surface modification, smear layer-deproteinization for self-etch adhesive systems, particularly in relation to improving the adhesion to caries-affected dentin. Recent Findings: Remnants of smear debris, which forms hybridized smear layer with self-etch adhesives, can prevent monomer infiltration and interfere with the chemical interaction of adhesive monomers and the underlying dentin. The hybridized smear layer weakens the physical and chemical properties of the resin-dentin hybridized complex both immediately and over time. Smear layer-deproteinization with NaOCl and HOCl solutions can improve the quality of resin-dentin interface of self-etch adhesives through elimination of the hybridized smear layer, development of monomer infiltration, and enhancement of the chemical interaction of adhesive monomers with hydroxyapatite due to an increase in the mineral/organic ratio on the dentin surface. These positive effects are influenced by the types of oxidizing solution and their application time and also depend upon the adhesive materials used because compromising effects of residual oxidized-byproducts at the dentin surface on the polymerization behavior of the adhesives are different between the materials. However, applying antioxidant/reducing agents can eliminate this problem. Summary: Smear layer-deproteinization is more effective for improving the bonding efficacy of self-etch adhesives to caries-affected dentin than normal dentin because caries-affected dentin produces a thicker organic-rich smear layer. Smear layer-deproteinization with HOCl solution, which has a rapid and broad-spectrum antimicrobial activity with less irritating and sensitizing properties, along with the subsequent application of antioxidant/reducing agents could enhance the longevity of composite restoration with self-etch adhesives.

KW - Antioxidant/reducing agent

KW - Caries-affected dentin

KW - Oxidizing solution

KW - Self-etch adhesive

KW - Smear layer

KW - Smear layer-deproteinization

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U2 - 10.1007/s40496-018-0185-z

DO - 10.1007/s40496-018-0185-z

M3 - Review article

AN - SCOPUS:85079859715

SN - 2196-3002

VL - 5

SP - 169

EP - 177

JO - Current Oral Health Reports

JF - Current Oral Health Reports

IS - 3

ER -

Smear Layer-Deproteinization: Improving the Adhesion of Self-Etch Adhesive Systems to Caries-Affected Dentin

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Keywords

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