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    Adhesive resistance against shear forces of metal brackets using different adhesive cements. In vitro study. Lima – Peru 2021
    (Universidad Privada Norbert Wiener, 2022-01-25) Yanac Calero, Darwin Newton; Chanamé Marín, Ann Rosemary
    One of the challenges in orthodontic treatment with braces is the installation and maintenance of fixed orthodontic appliances throughout the duration of the treatment. Therefore, the adhesive resistance to shear forces of metal brackets using different adhesive cements was determined. The research was experimental, cross-sectional, prospective, and comparative, where two types of cements were used: Orthocem and Heliosit, bonding to 20 dental pieces with their brackets. The laboratory mechanical procedure was then carried out using a universal testing machine, which applied vertical force at a rate of 1 mm/min until the brackets detached from the tooth, recording the data of this action. The adhesive resistance to shear forces of the metal brackets using the Orthocem adhesive cement was 2.592 ± 1.28 megapascals, and for the Heliosit adhesive cement, it was 2.437 ± 0.80 megapascals. The conclusion was that both Orthocem and Heliosit adhesive cements present similar adhesive resistance, with no statistically significant difference (p>0.05) to shear forces.