Effect of two bleaching regimens on enamel bonding performance

• Published in: Dental Materials Journal Vol. 39; no. 6; pp. 984 - 991
• Main Authors: HALABI, Somayah, MATSUI, Naoko, NIKAIDO, Toru, ABDO, Ahmed, BURROW, Michael F., TAGAMI, Junji
• Format: Journal Article
• Language: English; Japanese
• Published: Japan The Japanese Society for Dental Materials and Devices 27.11.2020; Japanese Society for Dental Materials and Devices; Japan Science and Technology Agency
• Subjects: Acid Etching, Dental; Acid resistance; Acid-base resistance zone; Adhesives; Animals; Bleaches; Bleaching; Bonding performance; Bonding strength; Cattle; Composite Resins; Dental Bonding; Dental Cements; Dental Enamel; Dentistry; Enamel; Materials Testing; Microshear bond strength; Performance evaluation; Resin Cements; Shear Strength; Tooth Bleaching; Variance analysis; Acid-base resistance zone; Bleaching; Enamel; Microshear bond strength; Bonding performance
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2019-239

This study evaluated the post-bleaching bonding performance of a one-step and two-step self-etch adhesive (SEA) to bleached enamel using in-office or at-home bleaching. Bovine enamel surfaces were treated with an in-office or at-home bleaching agent and divided into four post-bleach time periods: immediate, one day (1d), one week (1w) and one month (1m) before application of SEA systems. Enamel was bonded using the following procedures: Group 1: one-step SEA application (BeautiBond Multi, BBM), Group 2: two-step SEA application (FL-Bond II, FLBII). Microshear bond strengths (µSBS) were measured 24-h after bonding for each of the post-bleaching time periods. Acid-base resistant zones (ABRZs) were observed under SEM. Data were analyzed using three-way ANOVA. Bleaching caused a significant decrease of the immediate µSBSs for both adhesives (p≤0.005) then increased. Thick ABRZs were observed in BBM and FLBII after bleaching. Enamel µSBSs were adversely affected by bleaching. Thick ABRZ was created with bleaching.