Korean J Orthod.  2010 Aug;40(4):267-275. 10.4041/kjod.2010.40.4.267.

Effects of conventional and self-etching adhesive systems on bond strength of orthodontic attachments bonded to erupted and unerupted teeth

• Nur M
• Uysal T
• Yesilyurt
• Bayram M

• KMID: 1975607
• DOI: http://doi.org/10.4041/kjod.2010.40.4.267

Abstract

OBJECTIVE
The aim of this study was to evaluate and compare the shear bond strength (SBS) and failure-mode of orthodontic buttons bonded to erupted and unerupted teeth with conventional and self-etching adhesive systems.
METHODS
Eighty-four erupted and 84 unerupted, human third-molar teeth were used. For both groups, the buccal surfaces of each tooth were assigned one of the following type of adhesive systems (n = 12). A, Conventional systems: 1, Transbond XT (3M Unitek, Monrovia, CA, USA); 2, Prime & Bond NT (Dentsply/Caulk, Milford, USA); 3, Single Bond (3M ESPE, Minnesota, USA); and B, Self-etching adhesives; 4, Clearfil SE Bond (Kuraray, Okayama, Japan); 5, Transbond Plus (3M Unitek, Monrovia, CA, USA); 6, Clearfil S3 (Kuraray, Tokyo, Japan); 7, G Bond (GC, Tokyo, Japan). The SBSs of the attachments and the adhesive remnant index (ARI) scores were recorded. Data were analyzed with analysis of variance (ANOVA), independent-sample t-test and chi-square tests.
RESULTS
When the SBSs of erupted and unerupted teeth were compared, only the Clearfil-SE Bond and G-Bond were significantly different. Bond strengths of all adhesive systems were higher in unerupted teeth than erupted teeth, except the Single-Bond system.
CONCLUSIONS
When using conventional adhesives, bonding to erupted and unerupted teeth may not be significantly different. However, clinicians need to take into consideration the types of self-etching systems before usage.

Keyword

Bonding; Bracket; Resin; Adhesive

MeSH Terms

Adhesives
Bisphenol A-Glycidyl Methacrylate
Humans
Methacrylates
Minnesota
Polymethacrylic Acids
Resin Cements
Tokyo
Tooth
Tooth, Unerupted
Adhesives
Bisphenol A-Glycidyl Methacrylate
Methacrylates
Polymethacrylic Acids
Resin Cements

Figure

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  Fig 1 Shear application using the testing machine.

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  Fig 2 Scanning electron micrographs of erupted (A, × 500; B, × 1,500) and unerupted (C, × 500; D, × 1,500) molar teeth.

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  Fig 3 Attachment base design used in this study.

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