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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 9
[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
Total Affiliations: 6
Document type: Review article
Web of Science Citations: 0

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)

FAPESP's process: 17/10336-7 - Effect of design and surface treatment of new models of mini-implants in the osseointegration process: in vivo study in rabbits
Grantee:Mariana Lima da Costa Valente
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/17012-2 - Influence of macro and micro geometry of new models of mini-implants in the process of osseointegration: in vivo study in rabbits
Grantee:Andréa Cândido dos Reis
Support type: Regular Research Grants