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. 2015 Oct 1;7(4):e519-23.
doi: 10.4317/jced.52253. eCollection 2015 Oct.

Evaluation of Bond Strength of Orthodontic Brackets Without Enamel Etching

Free PMC article

Evaluation of Bond Strength of Orthodontic Brackets Without Enamel Etching

Alireza Boruziniat et al. J Clin Exp Dent. .
Free PMC article


Background: To compare the shear bond strength of brackets with and without enamel etching.

Material and methods: In this study, 60 sound premolars were randomly divided into four different groups: 1- TXE group: Enamel etching+Transbond XT adhesive+ Transbond XT composite. 2- TXS group: Transbond plus self-etch adhesive+ Transbond XT composite. 3- PQ1E group: Enamel etching+ PQ1 adhesive+ Transbond XT composite. 4- PQ1 group: PQ1 adhesive+ Transbond XT composite. The shear bond strengths of brackets were evaluated using universal testing machine at cross head speed of 0.5 mm/min. The Adhesive Remnant Index (ARI) was also measured. One-way ANOVA, Tukey's post hoc, Kruskal-wallis and Mann-Witney U test were used for data analysis.

Results: There was a significant difference between etched and unetched groups respect to SBS and ARI (p<0.05), however; no significant difference was observed between unetched group and self-etch adhesive group (p>> 0.05). The shear bond strength of PQ1 group was the least but in acceptable range and its ARI was less than other groups.

Conclusions: PQ1 adhesive can be used for bracket bonding without enamel etching with adequate bond strength and minimal ARI.

Key words: Bracket, shear bond strength, filled-adhesive, self-etch adhesive.

Conflict of interest statement

Conflict of interest statement: The authors affirm that they have no financial affiliation (e.g., employment, direct payment, stock holdings, retainers, consultantships, patent licensing arrangements or honoraria), or involvement with any commercial organization with direct financial interest in the subject or materials discussed in this manuscript, nor have any such arrangements existed in the past three years. Any other potential conflict of interest is disclosed.

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