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Analysis of the mechanical and physicochemical properties ofTi-6Al-4 Vdiscs obtained by selective laser melting and subtractive manufacturing method

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Autor(es):
da Costa Vermilion, Mariana Lima [1, 2] ; de Oliveira, Thaisa Theodoro [1, 2] ; Kreve, Simone [1, 2] ; Batalha, Rodolfo Lisboa [3] ; de Oliveira, Diego Pedreira [3] ; Pauly, Simon [4] ; Bolfarini, Claudemiro [3] ; Bachmann, Luciano [5, 6] ; dos Reis, Andrea Candido [1, 2]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Dent Mat & Prosthodont, USP, Sao Paulo - Brazil
[2] Univ Sao Paulo, Ribeirao Preto Dent Sch, USP, Sao Paulo - Brazil
[3] Univ Fed Sao Carlos, Dept Mat Engn, UFScar, Sao Carlos - Brazil
[4] Leibniz Inst Solid State & Mat Res, IFW, Inst Complex Mat, Dresden - Germany
[5] Univ Sao Paulo, Phys Dept, USP, Sao Paulo - Brazil
[6] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, USP, Sao Paulo - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo de Revisão
Fonte: JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS; v. 109, n. 3 AUG 2020.
Citações Web of Science: 0
Resumo

The surface properties of titanium and its alloys are commonly modified by different techniques, including additive manufacturing (AM), to improve the osseointegration of dental implants. The aim of this study was to evaluate and compare the wettability, topography, chemistry, and structure of titanium-aluminum-vanadium (Ti-6Al-4 V) discs fabricated by selective laser melting (SLM) and subtractive manufacturing (conventional machining). Three different groups were evaluated: selective laser melting (SLM); conventional machining with H3PO4 + NaOH surface treatment (CM + ST); and conventional machining without surface treatment (CM), including analysis of wettability and roughness, morphological and chemical analyses by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), and structural characterization analysis by computed tomography (micro-CT), and X-ray diffraction (XRD). The results showed that SLM surface had higher roughness (9.09 +/- 1.94 Ra; 51.93 +/- 11.59 Rz; 11.03 +/- 1.95 Sa) and lower wettability (103.23 degrees +/- 13) than CM (0.06 +/- 0.01 Ra; 0.42 +/- 0.078 Rz; 0.07 +/- 0.01 Sa) (76.95 degrees +/- 4.18) and CM + ST (0.17 +/- 0.38 Ra; 0.88 +/- 0.15 Rz; 0.18 +/- 0.04 Sa) (18.55 degrees +/- 6.47) (p < 0.05). SEM images also proved the higher roughness of SLM surface, and CM + ST discs showed a topography resembling a sponge, characteristic of the nanometric treatment applied. EDX and XRD found no differences between the different surfaces, and micro-CT demonstrated the solid characteristic of the SLM disc. Compared with conventional machining, the SLM technique resulted in higher roughness and lower wettability. Meanwhile, the chemical properties and structure of the titanium alloy was not altered by the technique. (AU)

Processo FAPESP: 17/10336-7 - Efeito do design e tratamento de superfície de novos modelos de mini-implantes no processo de osseointegração: estudo in vivo em coelhos
Beneficiário:Mariana Lima da Costa Valente
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 17/17012-2 - Influência da macro e micro geometria de novos modelos de mini-implantes no processo de osseointegração: estudo in vivo em coelhos
Beneficiário:Andréa Cândido dos Reis
Linha de fomento: Auxílio à Pesquisa - Regular