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Órgano Oficial de la Asociación Dental Mexicana

2020, Number 1

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Rev ADM 2020; 77 (1)

Evaluation of adhesion of total etch adhesive systems on bovine dental enamel using a deproteinizing agent: an in vitro study

Lang‑Salas MG, Villarreal‑Romero LA, Domínguez‑Monreal JA, Cuevas‑González JC, Donohué‑Cornejo A, Reyes‑López SY, Zaragoza‑Contreras EA, Espinosa‑Cristóbal LF

Language: Spanish
References: 18
Page: 22-27
PDF size: 226.33 Kb.


ABSTRACT

Introduction: Nowadays, patients require conventional fixed orthodontic treatment, which uses adhesive procedures related to the dentinal denture surface. Although there are different adhesive techniques that can offer adequate levels of bonding resistance, the use of NaClO as a deproteinizing agent has not been well defined in cementing materials in conventional orthodontic appliances. Objective: The objective of this study was to determine the levels of bond resistance using micro tension tests and topographic analysis with scanning electron microscopy. Material and methods: Twenty-blocks of bovine enamel were exposed superficially to conditioning solutions (37% orthophosphoric acid) with and without deproteinizing agent (5.25% NaClO); finally, individual orthodontic brackets were cemented with adhesive systems and resin composites of different trademarks (Ormco and 3M). Bonding resistance tests were performed with a universal force machine and topographic analysis was made with scanning electron microscopy. Results: The use of 5.25% NaClO and the Ormco brand had statistically better levels of adhesion than the group without deproteinization and the 3M brand, respectively. Adamantine topography exposed to the deproteinizing agent showed surface characteristics related to the type I etching pattern. Conclusion: The use of a deproteinizing agent (NaClO 5.25%) as well as a trademark (Ormco) in particular conditions could define the increase in adhesion levels on adamantine surfaces with conventional orthodontic appliances.


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