Surface treatments of ti-alloy based bone implant manufactured by electrical discharge machining

Abstract

Objective: This research aims to observe the extent to which several surface treatment techniques increase the surface roughness of titanium alloy implants which was manufactured via electrical discharge machining (EDM). The effects of these techniques were also observed to decrease the Cu content on the implant surface. Materials and Methods: In this research, ultrasonic cleaning, rotary tumbler polishing, and brushing were employed as techniques to increase the roughness of a titanium implant which was manufactured via EDM, to the moderately rough category, and to reduce the contaminant element deposited on its surface. An MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay test was also used to observe the effect of these engineered specimens with respect to mesenchymal stem cells’ proliferation. Results and Discussion: The results show that ultrasonic cleaning and rotary tumbler polishing created a significant increase (90% and 67%, respectively) in the surface roughness. On the other hand, brushing was shown to be the best benchmark for reducing the contamination of Copper (Cu). Furthermore, rotary tumbler polishing and brushing can increase the percentage of living cells compared to the original surface EDM specimens. Conclusion: All micro-finishing methods that were employed are able to increase the surface roughness of Ti alloy based-implant to moderately rough category.

β Tipi Ti Alaşımlarının Özellikleri Üzerine Bir Derleme: Mikroyapı, Mekanik, Korozyon Özellikleri ve Üretim Yöntemleri

“…Saf Ti ve Ti alaşımları döküm [120], talaşlı imalat [121], elektro erezyon ile işleme [122], bilgisayar destekli tasarım [123], bilgisayar destekli imalat [124], izotermal dövme [125], süperplastik şekillendirme [126], difüzyon bağlama, [127], toz metalürjisi [128], metal enjeksiyon kalıplama [35], lazer kaynağı [129] ve eklemeli imalat [130] gibi birçok farklı yöntem kullanılarak üretilebilmektedir. Üretim yöntemine bağlı olarak değişen işlem adımları, malzemenin mikroyapısını büyük ölçüde etkilemektedir.…”

Finite Element Analysis of Miniplate for Post-Fracture Finger Rehabilitation Device

“…Titanium alloys have better properties than pure titanium itself. Ti6Al4V alloy (ASTM F136) and commercially pure titanium (CP Ti), grade 4 (ASTM F67) are the most widely used materials in the implantation field (Qosim, Supriadi, Shamsuddin-Saragih, & Whulanza, 2018;Ratner, Hoffman, Schoen, & Lemons, 2004). So that in this study, Ti6Al4V was used as the material for the miniplate.…”

Comprehensive Review on Design and Manufacturing of Bio-scaffolds for Bone Reconstruction

“…Therefore, surface modification of developed scaffolds using a steel brush or ultrasonic cleaning or rotary tumbler polisher. It not only is effective in removing copper contaminants but also effective in enhancing surface roughness favoring cell attachment . Electrical discharge drilling (EDD) a type of EDM has also been reported in developing bio-scaffolds using Mg alloy (ZM21).…”

“…It not only is effective in removing copper contaminants but also effective in enhancing surface roughness favoring cell attachment. 240 Electrical discharge drilling (EDD) a type of EDM has also been reported in developing bioscaffolds using Mg alloy (ZM21). The repeated sparks resulting from EDD are said to generate high heat energy causing melting and evaporation of the material.…”