Reinforcement of bond strength of self-etching orthodontic adhesive

Abstract

Objective: To determine the reinforcement of bond strength of a self-etching system by applying a pretreatment agent. Materials and Methods: Sixty extracted human premolars were used in this study. The enamel surfaces were treated with four pretreatment agents-phosphoric acid, polyacrylic acid, citric acid, and ammonium hexafluorosilicate (SiF)-and were examined under a scanning electron microscope. Afterward, orthodontic brackets were bonded with a self-etching adhesive system (n 5 10 for each agent), and shear bond strength was measured through a debonding process. The adhesive remnant index (ARI) was also assessed.

Consequences of enamel preparation with sodium hypochlorite, polyacrylic and phosphoric acids for the bonding of brackets with resin-modified glass ionomer cements

“…The maintenance of adequate oral hygiene alongside the use of fixed braces remains a challenge for orthodontic patients and the development of white spot lesions during the orthodontic treatment is still a source of concern for dental professionals 2,3 . Bonding materials based on glass ionomer cement (GIC) have been commercially available for a long period of time 4 and these materials possess many important properties, such as biocompatibility with the enamel and dentin, and cariostatic effect. However, conventional GIC-based products exhibit low bond strengths (BSs) for bonding orthodontic brackets [5][6][7] .…”

“…These researchers concluded that the group of brackets bonded with RMGIC and previously treated with PAA showed greater shear BS compared with the group with enamel treated with PA. Horiuchi et al 4 microscopically observed enamel surfaces after acid conditioning using different agents (including PAA and PA) and subsequently conducted tests of shear strength on brackets bonded with composite resin. Surfaces conditioned with PAA remained virtually intact, whereas those conditioned with PA acid were porous.…”

Surface Evaluation of Enamel Etched by Er,Cr:YSGG Laser for Orthodontic Purpose

“…2 The main advantage of phosphoric acid etching is a high level of SBS is achieved. 3 Alternative methods to prepare dental surfaces, such as laser irradiation, have attracted increasing attention since the first laser application reported in 1964. 4 Among the high-power lasers, most used for dental applications is the erbium, chromium:yttriumscandium-gallium-garnet (Er,Cr:YSGG) laser, which emits at 2.78 μm and is strongly absorbed in hard tissues due to its interaction with both water and OH − from hydroxyapatite at the tissue interface.…”