Análise microscópica de características de superfície e espectroscopia da composição química de diferentes arcos ortodônticos
DOI:
https://doi.org/10.33448/rsd-v14i3.48429Palavras-chave:
Ortodontia, Microscopia Eletrônica de Varredura, Propriedades de Superfície.Resumo
The aim of this study was evaluate the superficial characteristics and chemical composition of thermally activated archwires used in self-ligating systems. NiTi and CuNiTi of 0.014 diameter (Ormco, Aditek, Orthometric, Morelli and Smart4Y) submitted to variable conditions using segments measuring 10-mm divided in 3 groups according to the immersion: not submitted to immersion, artificial saliva (Kin Hidrat) and acid solution (pH 4.3) using 2 mL of solution and kept at 37oC for 28 days. Then, the samples were evaluated in scanning electron microscopy Personal SEM© eXpress™ (Aspex Corporation, Oregon, EUA). Semi-quantitative analysis performed in energy dispersive x-ray spectroscopy mode evaluated surface chemical composition. CuNiTi wire (Ormco) showed higher roughness, while thermally activated wire (Morelli) the lower. In the wires immersed in artificial saliva, the superficial alteration was evident. In the chemical composition analysis, the CuNiTi wires presented percentages of Cu near to 6%. Low percentages (<0.3%) of Cu were detected in the other wires evaluated. For all groups there was predominance of Ni and Ti ions. In the wires immersed in artificial saliva, the ions Na, Cl and K were detected, suggesting saliva deposition components in the surface of wires. CuNiTi wires showed roughness surface characteristics in comparison to the other evaluated wires. The immersion in artificial saliva altered the surface of wires with deposition of ions.
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Copyright (c) 2025 Marina Angélica Marciano; Thiago Bessa Marconato Antunes; Ribamar Lazanha Lucateli; Ana Cristina Padilha Janini; Bruno Martini Guimarães; Adriana de Jesus Soares; Talita Tartari; Brenda P. F. A. Gomes; Maria Eugenia Pincke Coutinho
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