Vol. 13 – Number 52 – 2020 Original article Page 96-101 A comparison of shear bond strength after bonding with two orthodontic cements – an in vitro study Kalena de Melo Maranhão Pereira1 Fernanda Neves Borges de Oliveira1 Clayton Pereira Silva de Lima2 Joyce Figueira de Araújo Gatti3 Ana Cássia de Souza Reis4 Abstract The objective of this study was to evaluate the shear strength of orthodontic bands cemented with a new Orthobite composite, comparing them to the conventional glass ionomer cement in bovine enamel and to analyze the Adhesive Remnant Index (ARI). The sample consisted of 30 bovine teeth divided into 2 groups: Group I – Orthobite (FGM) and Group II – CIV MERON (VOCO). Prophylaxis has been made with pumice and water followed by cementation according to the manufacturer’s instructions. Afterwards, they were subjected to the shear test at a speed of 0.5 mm/minute speed. Data were submitted to the Student T and Kruskal-Wallis tests. Significant statistical differences were found between the groups both in the shear strength values (p> 0.05) and in the ARI assessment (p> 0.05). The Orthobite cement proved to be statistically superior to MERON, that is, it presented a better margins seal and a greater resistance to displacement, so this stable union between the tooth and the band is fundamental for the success of the orthodontic treatment. Descriptors: Glass ionomer cements, Shear strength, Orthodontics. 1 Me. In Dentistry, Dr. in Orthodontics – ESAMAZ. 2 Me in Genetics, Researcher at Instituto Evandro Chagas (IEC) – Ananindeua-PA. 3 Me, Dr. in Dentistry – ESAMAZ. 4 Me. In Dentistry, Graduate Student – ESAMAZ.
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