Chitosan-induced biomodification on demineralized dentin to improve the adhesive interface.

Objectives: Metalloproteinase-inhibiting agents, such as chitosan, can prevent collagen degradation in demineralized dental substrates, thereby improving the adhesive interface. This study evaluated the bond strength (BS) and chemical and morphological characterization of the adhesive interface after applying chitosan solution to demineralized dentin.

Materials And Methods: The 80 third molars were selected.

Chitosan improves the durability of resin-dentin interface with etch-and-rinse or self-etch adhesive systems.

Objective: Degradation of the dentin-resin interface can occur due to hydrolysis of exposed collagen, resulting in reduced bond strength. This study assessed the effect of dentin treatment with chitosan combined with an etch-and-rinse or self-etch adhesive system on improvement of bond strength and preservation of the interface durability.

Methodology: Enamel was removed from 80 molars and the teeth were divided into two groups: without chitosan (control) or with 2.

Protocols for sodium ascorbate application on intracoronary dentin bleached with high-concentrated agent.

Purpose: Composite resin restorations are normally replaced after the internal bleaching of endodontically treated-teeth because the bleaching agent does not alter the color of the restorative material. This study evaluated the effect of 10% sodium ascorbate (SA) applied at different protocols on bleached dentin.

Materials And Methods: One-hundred slabs of intracoronary bovine dentin were divided into 5 groups: 2 controls-GI without bleaching (positive), GII bleached with 35% hydrogen peroxide (HP) (negative); and 3 experimentals - GIII.