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Analysis of the mechanical and physicochemical properties of Ti-6Al-4 V discs obtained by selective laser melting and subtractive manufacturing method.
Journal of Biomedical Materials Research Part B: Applied Biomaterials ( IF 3.4 ) Pub Date : 2020-08-20 , DOI: 10.1002/jbm.b.34710
Mariana Lima da Costa Valente 1 , Thaísa Theodoro de Oliveira 1 , Simone Kreve 1 , Rodolfo Lisboa Batalha 2 , Diego Pedreira de Oliveira 2 , Simon Pauly 3 , Claudemiro Bolfarini 2 , Luciano Bachmann 4 , Andréa Cândido Dos Reis 1
Affiliation  

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° ± 13) than CM (0.06 ± 0.01 Ra; 0.42 ± 0.078 Rz; 0.07 ± 0.01 Sa) (76.95° ± 4.18) and CM + ST (0.17 ± 0.38 Ra; 0.88 ± 0.15 Rz; 0.18 ± 0.04 Sa) (18.55° ± 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.

中文翻译:

选区激光熔化减材制造Ti-6Al-4 V圆盘的力学和物理化学性能分析。

钛及其合金的表面特性通常通过不同的技术进行改性,包括增材制造 (AM),以改善牙科植入物的骨整合。本研究的目的是评估和比较通过选择性激光熔化 (SLM) 和减材制造(传统加工)制造的钛-铝-钒 (Ti-6Al-4 V) 圆盘的润湿性、形貌、化学和结构。评估了三个不同的组:选择性激光熔化 (SLM);使用 H 3 PO 4进行常规加工 + NaOH 表面处理(CM + ST);和未经表面处理 (CM) 的常规加工,包括通过扫描电子显微镜 (SEM) 和能量色散 X 射线光谱 (EDX) 进行的润湿性和粗糙度分析、形态和化学分析,以及通过计算机断层扫描 (micro-CT) 进行的结构表征分析) 和 X 射线衍射 (XRD)。结果表明,与CM相比,SLM表面具有更高的粗糙度(9.09±1.94 Ra;51.93±11.59 Rz;11.03±1.95 Sa)和更低的润湿性(103.23°±13)(0.06±0.01 Ra;0.42±0.078 Rz;0.07±0.01) Sa) (76.95° ± 4.18) 和 CM + ST (0.17 ± 0.38 Ra; 0.88 ± 0.15 Rz; 0.18 ± 0.04 Sa) (18.55° ± 6.47) ( p < 0.05)。SEM 图像还证明了 SLM 表面的更高粗糙度,CM + ST 圆盘显示出类似于海绵的形貌,这是应用纳米处理的特征。EDX 和 XRD 发现不同表面之间没有差异,显微 CT 证明了 SLM 盘的固体特性。与传统加工相比,SLM 技术导致更高的粗糙度和更低的润湿性。同时,该技术并未改变钛合金的化学性质和结构。
更新日期:2020-08-20
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