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KMID : 1034420210460040053
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Restorative Dentistry & Endodontics
2021 Volume.46 No. 4 p.53 ~ p.53
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Push-out bond strength and marginal adaptation of apical plugs with bioactive endodontic cements in simulated immature teeth
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Maria Aparecida Barbosa de Sa
Eduardo Nunes
Alberto Nogueira da Gama Antunes
Brito Manoel Junior
Martinho Campolina Rebello Horta
Rodrigo Rodrigues Amaral
Stephen Cohen
Frank Ferreira Silveira
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Abstract
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Objectives: This study evaluates the bond strength and marginal adaptation of mineral trioxide aggregate (MTA) Repair HP and Biodentine used as apical plugs; MTA was used as reference material for comparison.
Materials and Methods: A total of 30 single-rooted teeth with standardized, artificially created open apices were randomly divided into 3 groups (n = 10 per group), according to the material used to form 6-mm-thick apical plugs: group 1 (MTA Repair HP); group 2 (Biodentine); and group 3 (white MTA). Subsequently, the specimens were transversely sectioned to obtain 2 (cervical and apical) 2.5-mm-thick slices per root. Epoxy resin replicas were observed under a scanning electron microscope to measure the gap size at the material/dentin interface (the largest and smaller gaps were recorded for each replica). The bond strength of the investigated materials to dentin was determined using the push-out test. The variable bond strengths and gap sizes were evaluated independently at the apical and cervical root dentin slices. Data were analyzed using descriptive and analytic statistics.
Results: The comparison between the groups regarding the variables’ bond strengths and gap sizes showed no statistical difference (p > 0.05) except for a single difference in the smallest gap at the cervical root dentin slice, which was higher in group 3 than in group 1 (p < 0.05).
Conclusions: The bond strength and marginal adaptation to root canal walls of MTA HP and Biodentine cement were comparable to white MTA.
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KEYWORD
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Apexification, Calcium Silicate Materials, Marginal Adaptation, Mineral Trioxide Aggregate, Push-out Bond Strength, Scanning Electron Microscopy
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