Influence of different surface treatments on shear bond strength of a highly viscous glass ionomer cement bonded to a nanocomposite filling material using sandwich technique

Nasr El-Din El-Saeid, Lamiaa; . El-Negoly, Salwa A; Jazar, Husn A.

doi:10.21608/mjd.2020.198746

Influence of different surface treatments on shear bond strength of a highly viscous glass ionomer cement bonded to a nanocomposite filling material using sandwich technique

Document Type : Original Article

Authors

¹ Master’s faculty of Dentistry

² Professor of Dental BiomaterialsFaculty of DentistryLecturer of Dental BiomaterialsFaculty of DentistryMansoura University

10.21608/mjd.2020.198746

Abstract

Aim of study: This study aimed to evaluate the influence of different surface treatments on shear bond strength of a highly viscous glass ionomer cement bonded to a nanocomposite filling material using sandwich technique.
Materials &Methods: Sixty specimens (n=60) of a new HVGIC were divided into three main equal groups according to surface treatment protocols, group I (control): was treated with total etch adhesive, group II was treated with sandblasting with Al2o3 particles, group III was treated with sandblasting with Al2o3 and total etch adhesive. After surface treatment in all groups nanofilled composite resins were applied. Shear bond strength has been evaluated by using universal testing machine. The data were statically analyzed. Scanning Electron Microscope (SEM) was used to examine the mode of failure.
Results: The highest mean shear bond strength value was for group III with a significantly difference from group I (control) which showed lowest mean value. High incidence of mixed failure (adhesive-cohesive failure) was demonstrated among I & II groups. The predominant mode was cohesive failure in group III.
Conclusion: sandblasting with Al2o3 and total etch adhesive was the most effective technique to treat glass ionomer surface in sandwich technique..