Machining of biocompatible materials: a review

Saptaji, Kushendarsyah; Asmelash, Mebrahitom; Azhari, Azmir

doi:10.1007/s00170-018-1973-2

Cited by 80 publications

(42 citation statements)

References 143 publications

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“…Different oxides and carbides (TiO 2 , SiO 2 , TiC etc.) are used previously in different studies to enhance biocompatibility [5,42]. In this study, EDS analysis is employed due to its capability to analyze the bulk concentration of elements present on the modified surface.…”

Section: Resultsmentioning

confidence: 99%

“…Non-conventional machining techniques electric discharge machining (EDM), electron beam machining (EBM), and laser beam machining (LBM) among many others are being used to machine hard-to-cut materials [5]. In addition to machining the profiles, biomedical applications in dental and orthopaedics require specific surface modifications to enhance inherent (biocompatibility) properties.…”

Section: Introductionmentioning

confidence: 99%

“…Though electron beam melting is a widely used additive manufacturing process for fabricating different complex shapes [7] in the biomedical industry, the challenge remains in dealing with the intrinsic changing surface roughness in between layers due to layer by layer deposition offering potential places for fatigue cracks to initiate [8,9]. Therefore, EDM is considered to be likely choice for machining as well as surface modification process due to having the potential to improve the mechanical properties, corrosion and fatigue resistance, improved surface hardness, fabricating the most favourable surface on bio-implant due to generation of carbon and oxygen-enriched surface [5,10,11]. Electric discharge machining uses a series of high-frequency sparks that erode material by melting, vaporization, simultaneous solidification, again melting and thus on [12].…”

Section: Introductionmentioning

confidence: 99%

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On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

et al. 2020

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Surface modification is given vital importance in the biomedical industry to cope with surface tissue growth problems. Conventionally, basic surface treatment methods are used which include physical and chemical deposition. The major drawbacks associated with these methods are excessive cost and poor adhesion of coating with implant material. To generate a bioactive surface on an implant, electric discharge machining (EDM) is a promising and emerging technology which simultaneously serves as machining and surface modification technique. Besides the surface topology, implant material plays a very important role in surgical applications. From various implant materials, titanium (Ti6Al4V ELI) alloy is the best choice for long-term hard body tissue replacement due to its superior engineering, excellent biocompatibility and antibacterial properties. In this research, EDM’s surface characteristics are explored using Si powder mixed in dielectric on Ti6Al4V ELI. The effect of powder concentration (5 g/L, 10 g/L and 20 g/L) along with pulse current and pulse on time is investigated on micro and nanoscale surface topography. Optimized process parameters having a 5 g/L powder concentration result in 2.76 μm surface roughness and 13.80 μm recast layer thickness. Furthermore, a nano-structured (50–200 nm) biocompatible surface is fabricated on the surface for better cell attachment and growth. A highly favourable carbon enriched surface is confirmed through EDS which increases adhesion and proliferation of human osteoblasts.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

et al. 2020

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“…The analysis of the components of cutting forces is virtually indispensable in subtractive machining for medical and aircraft purposes—the components implemented in these industries must meet particularly severe quality requirements. This is even more difficult given the frequently manufactured thin-walled workpieces of complex geometry [2,3,4]. Considerable cutting forces could potentially decrease the surface finish quality, as a consequence of excessive chatter in the milling machine-milling cutter–workpiece–fixture system [5].…”

Section: Introduction—state-of-the-artmentioning

confidence: 99%

Trochoidal Milling and Neural Networks Simulation of Magnesium Alloys

et al. 2019

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This paper set out to investigate the effect of cutting speed vc and trochoidal step str modification on selected machinability parameters (the cutting force components and vibration). In addition, for a more detailed analysis, selected surface roughness parameters were investigated. The research was carried out for two grades of magnesium alloys—AZ91D and AZ31—and aimed to determine stable machining parameters and to investigate the dynamics of the milling process, i.e., the resulting change in the cutting force components and in vibration. The tests were performed for the specified range of cutting parameters: vc = 400–1200 m/min and str = 5–30%. The results demonstrate a significant effect of cutting data modification on the parameter under scrutiny—the increase in vc resulted in the reduction of the cutting force components and the displacement and level of vibration recorded in tests. Selected cutting parameters were modelled by means of Statistica Artificial Neural Networks (Radial Basis Function and Multilayered Perceptron), which, furthermore, confirmed the suitability of neural networks as a tool for prediction of the cutting force and vibration in milling of magnesium alloys.

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“…This method is commonly used in the optimisation of machining parameters. 36–43 The experimental plan was developed in two stages. The final goal is to determine the best strategy and parameters to minimise the arithmetical mean roughness value ( R a ).…”

Section: Methodsmentioning

confidence: 99%

Toolpath and machining parameters optimisation of the cavities of a knee prosthesis tibial insert

Lopes

Completo

Davim

2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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The main purpose of this paper is to demonstrate the applicability of conventional cutting tools in the machining of a custom tibial insert of a knee prosthesis. This study also aims to reduce the roughness and minimise the production time. In this work, the optimisation of cutting strategies and parameters was achieved through the design and construction of a test-part containing the most important complex surfaces of the femoral cavities, the focus of the study. The milling was carried out in accordance with the Design Of Experiment and the Taguchi method and was performed in two stages to reduce the number of analysed factors. The achieved parameters are applied to the machining of a modelled tibial insert made of UHMWPE, using a NC machine with three axes. The initial parameters studied were the cutting method, axial and radial depth of cut, the direction of the feed and the feed rate. Three strategies were studied: two Blend, resulting in radial and spiral toolpaths, and one Parallel. According to the spiral strategy, an arithmetical mean roughness of Ra = 1.1 µm was obtained, representing an improvement of 45% relatively to the initial phase value of 2.0 µm, with the Parallel toolpath. An overall improvement of 34% in time efficiency of the finishing operation was achieved after changing the machine settings. This study supports the conclusion that high-speed milling is an expeditious process to produce customised tibial inserts.

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Machining of biocompatible materials: a review

Cited by 80 publications

References 143 publications

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

On the Investigation of Surface Integrity of Ti6Al4V ELI Using Si-Mixed Electric Discharge Machining

Trochoidal Milling and Neural Networks Simulation of Magnesium Alloys

Toolpath and machining parameters optimisation of the cavities of a knee prosthesis tibial insert

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