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. 2021 Jan;16(1):424-430.
doi: 10.1016/j.jds.2020.07.014. Epub 2020 Aug 20.

Effects of plastic bracket primer on the shear bond strengths of orthodontic brackets

Hisae Saito  1 , Yukio Miyagawa  2 , Toshiya Endo  1   3
Affiliations

Effects of plastic bracket primer on the shear bond strengths of orthodontic brackets

Hisae Saito et al. J Dent Sci. 2021 Jan.

Abstract

Background/purpose: To assess the usefulness of plastic bracket primer (PBP) for improving the bond strength of plastic brackets (PBs) using three types of orthodontic brackets, including PBs, metal brackets (MBs), and ceramic brackets (CBs).

Materials and methods: A total of 162 premolars were gathered and divided equally into six groups of 27. Three groups were tested with the application of PBP (PB+, MB+, and CB+), and three groups were tested without primer (groups PB-, MB-, and CB-). All the groups were bonded using BeautiOrtho Bond II self-etching adhesive. The shear bond strength (SBS) was measured and the bond failure mode was evaluated using the adhesive remnant index after debonding.

Results: There were significant differences in the mean SBS between groups PB-, MB and CB-, between PB+ and CB+, and between MB+ and CB+. Group PB + had a significantly higher mean SBS than group PB-. The occurrence of bond failure at the enamel and adhesive interface was more frequent in groups PB+ and CB- than in group PB-; and in groups PB+ and CB + than in group MB+.

Conclusion: Plastic bracket primer can increase the bond strength of PBs to the level of metal brackets, but not to the level of ceramic brackets.

Keywords: Adhesive remnant index; Ceramic bracket; Metal bracket; Plastic bracket; Plastic bracket primer; Shear bond strength.

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Conflict of interest statement

Shofu Inc provided the BeautiOrtho Bond II to carry out this study. However, this company had no role in the study design, conduct of this study, date interpretation or preparation of this article.

Figures

Figure 1
Figure 1
The universal testing machine with the specimen holder ring.
Figure 2
Figure 2
Stereomicroscope photographs (a-d, x 10) and Scanning electron microscope photographs (e-h, x 22) of the enamel surface showing typical ARI scores of 0–3; a, e the ARI score 0, no adhesive remaining; b, f the ARI score 1, less than half of the adhesive remaining; c, g the ARI score 2, more than half of the adhesive remaining; d, h the ARI score 3, all adhesive remaining.
Figure 3
Figure 3
Shear bond strength (MPa). PB, MB, and CB indicate plastic, metal, and ceramic brackets, respectively; PB-, MB-, and CB-indicate plastic, metal, and ceramic brackets without the application of plastic bracket primer, respectively; PB+, MB+, and CB + indicate plastic, metal, and ceramic brackets with the application of the plastic bracket primer, respectively. ∗∗p < .01, ∗∗∗p < .001.
See this image and copyright information in PMC

References

    1. Ali O., Makou M., Papadopoulos T., Eliades G. Laboratory evaluation of modern plastic brackets. Eur J Orthod. 2012;34:595–602. - PubMed
    1. Ozcan M., Finnema K., Ybema A. Evaluation of failure characteristics and bond strength after ceramic and polycarbonate bracket debonding: effect of bracket base silanization. Eur J Orthod. 2008;30:176–182. - PubMed
    1. Godard M., Deuve B., Lopez I., Hippolyte M.P., Barthélemi S. Shear bond strength of two 2-step etch-and-rinse adhesives when bonding ceramic brackets to bovine enamel. Int Orthod. 2017;15:388–404. - PubMed
    1. Kumar B.S., Miryala S., Kumar K.K., Shameem K., Regalla R.R. Comparative evaluation of friction resistance of titanium, stainless steel, ceramic and ceramic with metal insert brackets with varying dimensions of stainless steel wire: an in vitro multi-center study. J Int Oral Health. 2014;6:66–71. - PMC - PubMed
    1. Anusavice K.J., Shen C., Rawls H.R. 12th ed. Saunders; St Louis, MO: 2013. pp. 99–100. (Phillips' science of dental materials).