Abstract:Aims:To assess the shear and tensile strengths of the bonded bracket to the treated porcelain surface with hydrofluoric acid, and microetcher. Materials and Methods: The sample included 30 specimens of porcelain blocks (6 mm in diameter and 2mm thickness). The sample was grouped into three groups, 10 specimens for each group. The groups were: acid etched, microetched at 5mm distance, and microetched at 10mm distance. Stainless steel brackets (Roth System) were bonded to the treated porcelain surfaces using lig… Show more
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