Shear bond strength of a RMGIC for orthodontic bracket bonding to enamel

Maureen Boudrot; Philippe François; Sarah Abdel-Gawad; Jean-Pierre Attal; Claire-Adeline Dantagnan

doi:10.1038/s41405-023-00181-5

Shear bond strength of a RMGIC for orthodontic bracket bonding to enamel

BDJ Open. 2024 Jan 2;10(1):1. doi: 10.1038/s41405-023-00181-5.

Authors

Maureen Boudrot¹, Philippe François^{2

3}, Sarah Abdel-Gawad², Jean-Pierre Attal^{2

4}, Claire-Adeline Dantagnan^{5

6}

Affiliations

¹ Pitié Salpêtrière Hospital, 47-83 Boulevard de l'Hôpital, 75013, Paris, France.
² Innovative Dental Materials and Interfaces Research Unit (URB2i), UR 4462, 1 Rue Maurice Arnoux, 92120, Montrouge, France.
³ Bretonneau Hospital, 23 Rue Joseph de Maistre, 75018, Paris, France.
⁴ Charles Foix Hospital, 7 Avenue de la République, 94200, Ivry-sur-Seine, France.
⁵ Pitié Salpêtrière Hospital, 47-83 Boulevard de l'Hôpital, 75013, Paris, France. claire-adeline.dantagnan@u-paris.fr.
⁶ Innovative Dental Materials and Interfaces Research Unit (URB2i), UR 4462, 1 Rue Maurice Arnoux, 92120, Montrouge, France. claire-adeline.dantagnan@u-paris.fr.

Abstract

Objective: To evaluate the shear bond strength (SBS) of a restorative resin-modified glass ionomer cement (RMGIC) for orthodontic bracket bonding.

Materials and methods: One hundred twenty-one human teeth were randomly divided into 11 groups (n = 11) according to the surface treatment applied (H₃PO₄ ± Transbond Plus (TSEP) or Scotchbond Universal (SU)), and the adhesive used (Riva LC HV (RIVA), Fuji Ortho (FUJI), and Transbond XT (TXT)). For each sample, a metal button was bonded. SBS tests were performed at 1 week and debonded specimens were observed for failure modes determination. One-way ANOVA followed by Tukey's post hoc test was used to compare SBS differences and Fisher's exact test to analyze the failure modes (p < 0.05).

Results: TSEP + FUJI and H₃PO₄ + SU + TXT showed the highest SBS values while H₃PO₄ + TSEP + RIVA showed the lowest value. Cohesive failure and mixed failure were found in the groups with SU and TXT and adhesive failure in the other groups.

Discussion/conclusions: The bonding of orthodontic attachments to enamel could be performed with any of the three materials studied. The use of a universal adhesive in the bonding protocol could optimize the adhesion values. Clinical studies would be needed to confirm the results obtained.