J Korean Acad Conserv Dent.  2004 May;29(3):219-225. 10.5395/JKACD.2004.29.3.219.

The effect of various commercially available bleaching agents on the microshear bond strength of composite resin to enamel

• Chang HS
• Cho KM
• Kim JW

• KMID: 1987097
• DOI: http://doi.org/10.5395/JKACD.2004.29.3.219

Abstract

This study evaluated the microshear bond strength of composte resin to teeth bleached with commercial whitening strips and compared with those bleached with home bleaching gel. Twelve extracted human central incisors were cut into pieces and central four segments were chosen from each tooth and embedded in acrylic resin. Four blocks with 12 tooth segments embedded in acrylic resin were acquired and numbered from group one to group four. Group 1 was bleached with Crest Whitestrips, group 2 with Claren, group 3 with Opalescence tooth whitening gel (10% carbamide peroxide). Group 4 was used as control. The bleaching procedure was conducted for 14 days according to the manufacturer's instructions; the bleaching strips twice a day for 30 min and the bleaching gel once a day for 2 hr. After bleaching, composite resin (Filtek Supreme) was bonded to the enamel surfaces with a self-etching adhesive (Adper Prompt L-Pop) using Tygon tube. Microshear bond strength was tested with a universal testing machine (EZ-test). The data were statistically analysed by one-way ANOVA. The study resulted in no statistical differences in microshear bond strength between the tooth segments bleached with 2 different whitening strips and bleaching gel. It can be concluded that the effect of bleaching with either commercial whitening strips or bleaching gel on enamel is minimal in bonding with self-etching adhesive to composite resin.

Keyword

Whitening strips; Crest; Claren; Microshear bond strength

MeSH Terms

Adhesives
Bleaching Agents*
Dental Enamel*
Humans
Incisor
Soil
Tooth
Tooth Bleaching
Urea
Adhesives
Bleaching Agents
Soil
Urea

Figure

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  Figure 1 Tooth embedded in resin specimen was cut into squares of 2×2 mm in size and the most central 4 segments were chosen.

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  Figure 2 Fine ligature wire was looped around the composite resin cylinder and pulled until failure occurred. The load cell, the wire and the composite resin cylinder were arranged in one line.

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