Evaluation of the Effect of the Enamel Deproteinization Combined with a Self-Etching Primer in the Adhesion of Orthodontic Brackets: An in Vitro Study

To evaluate the enamel deproteinization with sodium hypochlorite in the enamel conditioning using a self-etching primer to adhesion in orthodontic brackets. The bonding in Orthodontics has a major role in the success of the treatment. tTe self-etching primers reduces the chair time and diminishes the risk of saliva contamination To evaluate the enamel deproteinization with sodium hypochlorite in the enamel conditioning using a self-etching primer to adhesion in orthodontic brackets. The sample comprised 80 bovines' incisors, divided into 4 groups according to deproteinization process and adhesive system used: G1: enamel deproteinization + Transbond Plus self-etching primer + Transbond XT adhesive; G2: enamel deproteinization + 37% phosphoric acid + conventional primer + and Transbond XT adhesive; G3: Transbond Plus self-etching primer + Transbond XT adhesive; and G4: 37% phosphoric acid + conventional primer + Transbond XT adhesive. EMIC® DL 500 Universal Testing Machine was used for testing the shear bond strength of the samples. Brackets bonded with self-etching primer showed greater adhesion force. The enamel deproteinization didn't improve the bonding strength, regardless of the primer used. The deproteinization process doesn't improve the result of the adhesive bonding when using a self-etching primer in-vitro.