J Korean Acad Conserv Dent.  2010 Mar;35(2):106-115. 10.5395/JKACD.2010.35.2.106.

Microtensile bond strength of self-etching and self-adhesive resin cements to dentin and indirect composite resin

Affiliations
  • 1Department of Conservative Dentistry, College of Dentistry, Chosun University, Gwangju, Korea. ygcho@chosun.ac.kr
  • 2Department of Dentistry, Graduated School of Chonnam National University, Gwangju, Korea.

Abstract

The purpose of this study was to evaluate the microtensile bond strength (microTBS), failure modes and bonding interfaces of self-etching and three self-adhesive resin cements to dentin and indirect composite resin. Cylindrical composite blocks (Tescera, Bisco Inc.) were luted with resin cements (PA: Panavia F 2.0, Kuraray Medical Inc., RE: RelyX Unicem Clicker, 3M ESPE., MA: Maxem, Kerr Co., BI: BisCem, Bisco Inc.) on the prepared occlusal dentin surfaces of 20 extracted molars. After storage in distilled water for 24 h, 1.0 mm x 1.0 mm composite-dentin beams were prepared. microTBS was tested at a cross-head speed of 0.5 mm/min. Data were analyzed with one-way ANOVA and Tukey's HSD test. Dentin sides of all fractured specimens and interfaces of resin cements-dentin or resin cements-composite were examined at FE-SEM (Field Emission-Scanning Electron Microscope). In conclusion, PA and RE showed higher bond strength and closer adaptation than MA and BI when indirect composite blocks were luted to dentin using a self-etching and three self-adhesive resin cements.

Keyword

Microtensile bond strength; Self-etching resin cement; Self-adhesive resin cement; Dentin; Indirect composite resin

MeSH Terms

Dentin
Dentin-Bonding Agents
Electrons
Molar
Resin Cements
Water
Dentin-Bonding Agents
Resin Cements
Water

Figure

  • Figure 1 SEM micrograph of dentin side showing a representative cohesive failure within Panavia F 2.0 (× 130).

  • Figure 2 SEM micrograph showing remnant fractured filler (F) and cement (C) on the surface of fractured Panavia F 2.0 (× 5,000).

  • Figure 3 SEM micrograph of dentin side showing a representative mixed failure with a thin layer of RelyX Unicem Clicker on the dentin surface (× 130).

  • Figure 4 SEM micrograph of dentin side showing a representative adhesive failure of Maxcem along dentin surface (× 130).

  • Figure 5 SEM micrograph showing remnant a few small sized filler (F) and cement (C) on the dentin surface and fractured Maxem (× 5,000).

  • Figure 6 SEM micrograph of dentin side showing a representative adhesive failure of BisCem along dentin surface (× 130).

  • Figure 7 SEM micrograph showing gap (G), about 5 µm wide, between the composite resin (R)-Panavia F 2.0 (P), and close adaptation with numerous short and long resin tags between the Panavia F 2.0-dentin (D) (× 600).

  • Figure 8 SEM micrograph showing wide gap (G), about 70 µm wide, between the composite resin (R)-RelyX Unicem Clicker (RU), and close adaptation with a few short resin tags between RelyX Unicem Clicker-dentin (D) (× 600).

  • Figure 9 SEM micrograph showing wide gap (G), about 60 µm wide, between the composite resin (R)-Maxcem (M), and discontinuous 1-2 µm wide gaps(g) between Maxem-dentin (D) (× 600).

  • Figure 10 SEM micrograph showing gap (G), about 15 µm wide, and a few short resin tags between BisCem (B)-dentin (D) (× 600).


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