生物材料表面粗糙度及提高生产率的二氧化钛喷砂工艺参数

Mizael Rodrigues, N. C. da Cruz, Joaquim A F Rocha, Rosa Sa, E. Bock
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引用次数: 8

摘要

钛因其生物材料的特性而被用于牙科植入物。表面粗糙度对于获得所需的生物相容性结果非常重要和基础。具有中等粗糙表面的牙种植体通常用于治疗无牙患者。为了提高生产效率,在某种植体行业进行了实验,评估了加工参数对种植体表面的影响。采用特定的工艺参数对不同直径的试样进行加工,并在爆破前后、有无无菌化学腐蚀的情况下测量试样的粗糙度。结果表明,粗糙度随进给量的增加而随机增大,表明喷砂后粗糙度与加工进给量无关。与经过无菌处理的喷砂样品相比,未经过化学无菌处理的喷砂样品的粗糙度有所降低。然而,这一趋势保持不变,从而得出结论,喷钛过程使表面粗糙度均匀,独立于第一粗糙度的变化。没有观察到进给量的变化与粗糙度的变化之间的关系。因此,在提高产量的同时,切料对生物相容性没有影响。经过二十多年的首次工业应用,本研究证明了改变二氧化钛喷砂工艺参数以提高种植牙生产效率的可能性。
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Surface roughness of biomaterials and process parameters of titanium dioxide gritblasting for productivity enhancement
Titanium is used in dental implants because of its properties as a biomaterial. Surface roughness is very important and fundamental for obtaining required results of biocompatibility. Dental implants with moderately rough surfaces are commonly used in the treatment of edentulous patients. Aiming for improvements in productivity, experiments were conducted in a dental implant industry to evaluate the influence of machining parameters on the surface of dental implants. Samples of different diameters were machined with specific parameters and their roughnesses were measured, before and after blasting, with and without asepsis chemical attack. The results indicate a random increase in roughness according to increase of feed parameter, evidencing that there is no relation between roughness and machining feed after gritblasting. Samples exposed to gritblasting that did not undergo chemical asepsis showed a decrease in roughness, compared to roughness of blasted samples and submitted to asepsis process. However, this trend remained constant leading to the conclusion that titanium-blasting process makes the surface roughness uniform, independently of first roughness variation. No relationship was observed between the variation of feed and the variation of roughness. Thus, in terms of productivity, cutting feed was increased with no harm to the biocompatibility. After more than twenty years of its first use in the industry, this study proves the possibility of changes in the process parameters of titanium dioxide gritblasting to increase productivity in the manufacture of dental implants.
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