Adhesion and marginal adaptation of a claimed bioactive, restorative material

Abstract

Objectives: Adhesion and marginal adaptation of a claimed bioactive restorative material (ACTIVA BioACTIVE Restorative) to human teeth were compared with those of a resin-modified glass ionomer cement (Fuji II LC) and a control resin composite (Ceram X Mono).

Material and Methods: Shear bond strength and marginal adaptation to enamel and dentine were assessed after no pretreatment of the hard tissues or after etching with phosphoric acid (ACTIVA BioACTIVE Restorative and Ceram X Mono) or polyacrylic acid (Fuji II LC). For ACTIVA BioACTIVE Restorative, the effect of applying a self-etch adhesive (Xeno Select, Dentsply Sirona) was also investigated. Data were analyzed using non-parametric tests (α = 0.05).

Results: Bond strength and marginal adaptation in enamel and dentine were significantly different among the investigated materials (p<.05). Due to loss of restorations, it was not possible to measure bond strength of ACTIVA BioACTIVE Restorative if no pretreatment was performed or if dentine was etched; however, use of the self-etch adhesive resulted in similar bond strength as Ceram X Mono. Etching improved adhesion of Fuji II LC to enamel and dentine. Regarding marginal adaptation, ACTIVA BioACTIVE Restorative showed the highest wall-to-wall contraction to enamel in all pretreatment groups and the overall highest wall-to-wall contraction to dentine after etching. Due to loss of restorations, no marginal assessment was possible on cavities with margins in dentine when no pretreatment was used. The use of a self-etch adhesive with ACTIVA BioACTIVE Restorative resulted in similar adaptation to dentine compared to the other materials.

Conclusion: The self-adhesive property of ACTIVA BioACTIVE Restorative is nonexistent.

Keywords:

• Composite resins
• glass ionomer cements
• dental bonding
• dental marginal adaptation

Acknowledgments

This work was part of the research traineeship of Stavroula Michou, funded by the Erasmus+ EU Programme, European Commission. Additional expenses were covered by the Faculty of Health and Medical Sciences, Department of Odontology, University of Copenhagen. The authors acknowledge Lifco Dental AB, Sweden, for donating the investigated materials and some consumables used in this project. The results of this study were shared at the Academy of Dental Materials meeting in Porto de Galinhas, Brazil held on October 2018 [23].

Disclosure statement

The authors report no conflict of interest.