A Coelho1, J P Canta2, J N R Martins3, S Arantes-Oliveira4, P F Marques1. 1. Pediatric Dentistry Department, Faculdade de Medicina Dentária, Universidade de Lisboa, Rua Professora Teresa Ambrósio, Cidade Universitária, 1600-277, Lisbon, Portugal. 2. Implantology Department, Faculdade de Medicina Dentária, Universidade de Lisboa, Rua Professora Teresa Ambrósio, Cidade Universitária, 1600-277, Lisbon, Portugal. 3. Endodontics Department, Faculdade de Medicina Dentária, Universidade de Lisboa, Rua Professora Teresa Ambrósio, Cidade Universitária, 1600-277, Lisbon, Portugal. jnr_martins@yahoo.com.br. 4. Biomaterials Department, Faculdade de Medicina Dentária, Universidade de Lisboa, Rua Professora Teresa Ambrósio, Cidade Universitária, 1600-277, Lisbon, Portugal.
Abstract
AIM: To determine the influence of two all-in-one self-etching adhesive systems on shear bond strength of a fissure sealant applied under different enamel surface conditions. METHODS: A total of 180 bovine enamel specimens were randomly distributed to nine experimental groups, defined by the combination of the sealant application technique (using phosphoric acid, or a self-etching water-based adhesive or a self-etching ethanol and water-based adhesive) and enamel surface conditions (dry enamel, saliva or water contaminated enamel). The specimens were submitted to thermocycling prior to the shear bond strength test. RESULTS: High shear bond strength mean values were obtained with the classic technique for dry enamel (31.47 MPa), statistically similar values were obtained when the sealant was combined with a self-etching water-based adhesive, in dry enamel (32.36 MPa), and when the sealant was combined with a self-etching water-based adhesive in water contaminated enamel (32.62 MPa). Under enamel salivary contamination, the best results were achieved using a water-based adhesive (24.78 MPa). CONCLUSIONS: In saliva contaminated enamel, the combination of a sealant with a water-based self-etching adhesive can maintain high and satisfactory values of bond strength.
AIM: To determine the influence of two all-in-one self-etching adhesive systems on shear bond strength of a fissure sealant applied under different enamel surface conditions. METHODS: A total of 180 bovine enamel specimens were randomly distributed to nine experimental groups, defined by the combination of the sealant application technique (using phosphoric acid, or a self-etching water-based adhesive or a self-etching ethanol and water-based adhesive) and enamel surface conditions (dry enamel, saliva or water contaminated enamel). The specimens were submitted to thermocycling prior to the shear bond strength test. RESULTS: High shear bond strength mean values were obtained with the classic technique for dry enamel (31.47 MPa), statistically similar values were obtained when the sealant was combined with a self-etching water-based adhesive, in dry enamel (32.36 MPa), and when the sealant was combined with a self-etching water-based adhesive in water contaminated enamel (32.62 MPa). Under enamel salivary contamination, the best results were achieved using a water-based adhesive (24.78 MPa). CONCLUSIONS: In saliva contaminated enamel, the combination of a sealant with a water-based self-etching adhesive can maintain high and satisfactory values of bond strength.
Authors: I Mézquita-Rodrigo; R J Scougall-Vilchis; M A Moyaho-Bernal; L E Rodríguez-Vilchis; E Rubio-Rosas; R Contreras-Bulnes Journal: Eur Arch Paediatr Dent Date: 2021-08-07