Effect of adhesive strategy on non-carious cervical lesions pre-conditioned with bioactive glass air-abrasion: a randomised controlled clinical trial

Abstract

\n Background: This double-blind randomised controlled clinical trial evaluated the effect of adhesive strategy on the performance of resin composite restorations in non-carious cervical lesions (NCCLs) preconditioned using bioactive glass air-abrasion.Methods: One hundred teeth with NCCLs were assigned randomly into four experimental groups (n=25); A: air-abrasion + etch & rinse adhesive (AA+ER), B: air-abrasion + self-etch adhesive (AA+SE), C: etch & rinse adhesive (ER) and D: self-etch adhesive (SE). NCCLs were restored clinically using conventional resin composite placed incrementally. The lesions and restorations were evaluated at baseline, 3-months and 6-months according to the World Dental Federation (FDI) criteria. The level of statistical significance was established at p=0.05.Results: An increased retention rate was observed at 6-month recall within the AA+ER group. The retention rate of NCCLs restoration was affected significantly by the height of the NCCLs. NCCLs width and the height affected significantly the marginal adaptation of the restorations. Conclusion: Etch-and-rinse adhesive revealed a statistical improved retention rate when compared to self-etch adhesive in NCCLs pre-conditioned with bioactive glass air-abrasion at 6-months recall. NCCLs’ physical characteristics affected significantly the resin composite restoration performance.This clinical trial was registered in clinicaltrial.gov clinical registry under protocol # NCT04578717.