Effect of self-etching primer containing N-acryloyl aspartic acid on enamel adhesion

Yasuhiro Torii, Kousuke Itou, Yoshihiro Nishitani, Masahiro Yoshiyama, Kunio Ishikawa, Kazuomi Suzuki

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Objectives: A previous study demonstrated that N-acryloyl aspartic acid (N-AAsp) aqueous solution is useful as a self-etching primer for dentin adhesion. The purpose of this study was to evaluate whether N-AAsp solution can be used for enamel etching, when compared with phosphoric acid. Methods: N-AAsp was synthesized by the reaction of DL-aspartic acid and acryloyl chloride. The experimental self-etching primers were prepared by dissolving N-AAsp in water at various concentrations up to 20 wt%. The tensile bond strength of resin to bovine enamel was measured after the enamel was treated with the N-AAsp primers. The 40 wt% H3PO4 was used for comparison. The treated enamel surfaces and the resin-enamel interfaces were also observed with a scanning electron microscope. Results: The tensile bond strength to enamel increased linearly with the increasing N-AAsp concentration and reached the same value as that to enamel etched with 40 wt% H3PO4 when N-AAsp concentration was 20 wt%, even though the etching ability of 20 wt% N-AAsp was inferior to 40 wt% H3PO4. Regardless of the concentration of N-AAsp, the bond strength to enamel was the same as that to dentin reported in our previous study. Significance: The 20 wt% N-AAsp aqueous solution showed enamel bonding equivalent to 40 wt% H3PO4 in addition to the advantage of eliminating the rinse step with water. Based on the results obtained in this study along with those obtained in a previous study, it was concluded that 20 wt% N-AAsp aqueous solution is a promising self-etching primer to simultaneously treat enamel and dentin.

Original languageEnglish
Pages (from-to)253-258
Number of pages6
JournalDental Materials
Volume19
Issue number4
DOIs
Publication statusPublished - Jun 2003

Fingerprint

Enamels
Dental Enamel
Etching
Adhesion
Acids
Dentin
Tensile Strength
N-acryloylaspartic acid
Resins
Water
Phosphoric acid
Aspartic Acid
Electron microscopes
Electrons
Scanning

Keywords

  • Enamel adhesion
  • N-acryloyl aspartic acid
  • Self-etching primer
  • Tensile bond strength

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Effect of self-etching primer containing N-acryloyl aspartic acid on enamel adhesion. / Torii, Yasuhiro; Itou, Kousuke; Nishitani, Yoshihiro; Yoshiyama, Masahiro; Ishikawa, Kunio; Suzuki, Kazuomi.

In: Dental Materials, Vol. 19, No. 4, 06.2003, p. 253-258.

Research output: Contribution to journalArticle

Torii, Yasuhiro ; Itou, Kousuke ; Nishitani, Yoshihiro ; Yoshiyama, Masahiro ; Ishikawa, Kunio ; Suzuki, Kazuomi. / Effect of self-etching primer containing N-acryloyl aspartic acid on enamel adhesion. In: Dental Materials. 2003 ; Vol. 19, No. 4. pp. 253-258.
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abstract = "Objectives: A previous study demonstrated that N-acryloyl aspartic acid (N-AAsp) aqueous solution is useful as a self-etching primer for dentin adhesion. The purpose of this study was to evaluate whether N-AAsp solution can be used for enamel etching, when compared with phosphoric acid. Methods: N-AAsp was synthesized by the reaction of DL-aspartic acid and acryloyl chloride. The experimental self-etching primers were prepared by dissolving N-AAsp in water at various concentrations up to 20 wt{\%}. The tensile bond strength of resin to bovine enamel was measured after the enamel was treated with the N-AAsp primers. The 40 wt{\%} H3PO4 was used for comparison. The treated enamel surfaces and the resin-enamel interfaces were also observed with a scanning electron microscope. Results: The tensile bond strength to enamel increased linearly with the increasing N-AAsp concentration and reached the same value as that to enamel etched with 40 wt{\%} H3PO4 when N-AAsp concentration was 20 wt{\%}, even though the etching ability of 20 wt{\%} N-AAsp was inferior to 40 wt{\%} H3PO4. Regardless of the concentration of N-AAsp, the bond strength to enamel was the same as that to dentin reported in our previous study. Significance: The 20 wt{\%} N-AAsp aqueous solution showed enamel bonding equivalent to 40 wt{\%} H3PO4 in addition to the advantage of eliminating the rinse step with water. Based on the results obtained in this study along with those obtained in a previous study, it was concluded that 20 wt{\%} N-AAsp aqueous solution is a promising self-etching primer to simultaneously treat enamel and dentin.",
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N2 - Objectives: A previous study demonstrated that N-acryloyl aspartic acid (N-AAsp) aqueous solution is useful as a self-etching primer for dentin adhesion. The purpose of this study was to evaluate whether N-AAsp solution can be used for enamel etching, when compared with phosphoric acid. Methods: N-AAsp was synthesized by the reaction of DL-aspartic acid and acryloyl chloride. The experimental self-etching primers were prepared by dissolving N-AAsp in water at various concentrations up to 20 wt%. The tensile bond strength of resin to bovine enamel was measured after the enamel was treated with the N-AAsp primers. The 40 wt% H3PO4 was used for comparison. The treated enamel surfaces and the resin-enamel interfaces were also observed with a scanning electron microscope. Results: The tensile bond strength to enamel increased linearly with the increasing N-AAsp concentration and reached the same value as that to enamel etched with 40 wt% H3PO4 when N-AAsp concentration was 20 wt%, even though the etching ability of 20 wt% N-AAsp was inferior to 40 wt% H3PO4. Regardless of the concentration of N-AAsp, the bond strength to enamel was the same as that to dentin reported in our previous study. Significance: The 20 wt% N-AAsp aqueous solution showed enamel bonding equivalent to 40 wt% H3PO4 in addition to the advantage of eliminating the rinse step with water. Based on the results obtained in this study along with those obtained in a previous study, it was concluded that 20 wt% N-AAsp aqueous solution is a promising self-etching primer to simultaneously treat enamel and dentin.

AB - Objectives: A previous study demonstrated that N-acryloyl aspartic acid (N-AAsp) aqueous solution is useful as a self-etching primer for dentin adhesion. The purpose of this study was to evaluate whether N-AAsp solution can be used for enamel etching, when compared with phosphoric acid. Methods: N-AAsp was synthesized by the reaction of DL-aspartic acid and acryloyl chloride. The experimental self-etching primers were prepared by dissolving N-AAsp in water at various concentrations up to 20 wt%. The tensile bond strength of resin to bovine enamel was measured after the enamel was treated with the N-AAsp primers. The 40 wt% H3PO4 was used for comparison. The treated enamel surfaces and the resin-enamel interfaces were also observed with a scanning electron microscope. Results: The tensile bond strength to enamel increased linearly with the increasing N-AAsp concentration and reached the same value as that to enamel etched with 40 wt% H3PO4 when N-AAsp concentration was 20 wt%, even though the etching ability of 20 wt% N-AAsp was inferior to 40 wt% H3PO4. Regardless of the concentration of N-AAsp, the bond strength to enamel was the same as that to dentin reported in our previous study. Significance: The 20 wt% N-AAsp aqueous solution showed enamel bonding equivalent to 40 wt% H3PO4 in addition to the advantage of eliminating the rinse step with water. Based on the results obtained in this study along with those obtained in a previous study, it was concluded that 20 wt% N-AAsp aqueous solution is a promising self-etching primer to simultaneously treat enamel and dentin.

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