Surface Modification on CoCrMo Alloy to Improve the Adhesion Strength of Hydroxyapatite Coating

Ayu, Hassan Mas; Izman, S.; Daud, R.; Krishnamurithy, G.; Shah, A.; Tomadi, S. H.; Salwani, Mohd Salleh

doi:10.1016/j.proeng.2017.04.110

Cited by 30 publications

(27 citation statements)

References 40 publications

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“…One of those methods is through reinforcing materials such as zirconia oxide (ZrO 2 ), carbon nanotubes (CNTs), and titanium oxide (TiO 2 ) [11,[83][84][85][86][87]. On the other hand, several reported regarding the HAp-based coating showed the enhancement in adhesion strength approaching 70% greater compared to pure HAp coating [88].…”

Section: Electrochemical Depositionmentioning

confidence: 99%

“…The hydroxyapatite (HAp) is the primary inorganic ingredient of natural bones and has been the most widely used ceramic-based biomaterial for over four decades in medicine and dentistry. It has been proven by many researchers that HAp coating allows a controlled and rapid osseointegration between living bone and the surface of an implant [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Hydroxyapatite-Based Coating on Biomedical Implant

Harun¹,

Asri²,

Sulong³

et al. 2018

Hydroxyapatite - Advances in Composite Nanomaterials, Biomedical Applications and Its Technological Facets

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The use of metallic biomaterials for replacement of biomedical implants has been traced back from the nineteenth century. These metallic biomaterials have been declared as clinical success as their mechanical properties that satisfy the prerequisite of the human bone. Nevertheless, critical issues of the materials when they are utilised as implants; including the releasing toxic and harmful metal ions through wear and corrosion processes after longer implantation. Besides that, the bonding strength between bone and implants itself is considered weak due to the diferent components of human bone and metal implants. Hence, developing hydroxyapatite (HAp) coating on metallic biomaterials is expected to overcome the problems faced by biocompatible metallic biomaterials. As far as this, various commercial techniques have been introduced to develop the HAp coating on metallic biomaterials. The techniques are including plasma-spraying method, sol-gel dip-coating, electrochemical deposition and high-velocity suspension plasma-spraying. The formation of HAp coating on metallic biomaterials improved the corrosion resistance together promoting its load-bearing ability and enhanced substrate-coating adhesion.

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Section: Electrochemical Depositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite-Based Coating on Biomedical Implant

Harun¹,

Asri²,

Sulong³

et al. 2018

Hydroxyapatite - Advances in Composite Nanomaterials, Biomedical Applications and Its Technological Facets

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show abstract

“…However, this alloy is known to have low biocompatibility properties during implantation such as releasing toxicity ions and slow speed in promoting cell growth on the tissues-substrate interface [3]. Since the formation of a living bone with direct contact to the implant surface is a critical issue, many attempts have been made to modify the implant surface in order to improve bone bonding ability as well as accelerate the bone healing [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, numerous research on surface modification techniques pertaining cobalt based alloy including thermal oxidation, surface coating, thermal spray, electrochemical deposition and ion implantation have been investigated many years to overcome these issues [4,[6][7][8][9][10][11][12]. At early implantation, protein film will respond with cells to multiply and form into various types of complex tissues [13].…”

Section: Introductionmentioning

confidence: 99%

Improving biocompatibility of cobalt based alloy using chemical etching and mechanical treatment

Ayu

Daud

Kurniawan

et al. 2019

Materialwissenschaft Werkst

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Biomedical grade of cobalt based alloy have found a plethora of applications as medical devices especially in dental and articulation joints like in total ankle, knee and hip arthroplasty. However, the long‐term performance of this material is highly dependent on their ability to withstand in harsh aqueous environment effects such as corrosion and wear once they are used inside a human body. Loss of surface integrity and subsequent leaching of toxic metal ions as well as particles to the surrounding tissues may undermine biocompatibility of metallic implants, also potentially causing untimely loss of mechanical function and device failure. In this study, a biomedical grade of Co−Cr−Mo alloy surface was treated with various surface modification techniques such as chemical etching and mechanical roughening in order to improve its biocompatibility. Investigation was done to study which surface modification techniques possesses the positive effect in cell growth and exhibit excellent cell response on Co−Cr−Mo alloy. In‐vitro study showed that human osteoblast cells grown with good adherence and spread out with an intimate contact on the chemical treated surface after 14 days of incubation. It is believed that porous structure with grooves owned by chemical treated surface helps in anchoring the cells to the substrate surface and facilitates cells growth since more protein molecules expected to have more sites on this surface. Whilst on mechanical roughened surface, the cells appeared to show slightly less extended cell membranes and the cells remained retarded.

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“…The good mechanical properties of implants are also related to the contact of the implant and human hard tissues. Even though, basic requirement of an implant material is to have good hardness, excellent corrosion and erosion resistance with good wear resistance, interaction between the tissues-implant interfaces is also play an important role (Mas Ayu et al, 2017;Giacchi et al, 2011;Geetha et al, 2010;Guocheng and Hala, 2010;Paital and Dahotre, 2009). Hence, surface modification of biomaterial implants is always aimed at modifying the material while still maintaining the bulk mechanical properties of the implant.…”

Section: Introductionmentioning

confidence: 99%

Thermal oxidation process improved corrosion in cobalt chromium molybdenum alloys

Ayu

Daud²,

Shah³

et al. 2017

Int. j. adv. appl. sci.

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The corrosion phenomena are always give bad impact to any metal products including human implants. This is due to the corrosion impacts are harmful for hard tissues and soft tissues. There are many methods to prevent the process of corrosion on implant materials such as coating with bioceramic materials and modify the implant surface with surface modification techniques. However, until now there is still no gold standard to overcome this problem and it is remain in researching process. Thus, the aim of this research is to investigate the potential and economical surface modification method to reduce the corrosion effects on Cobalt-Chromium-Molybdenum (Co-Cr-Mo) based alloy when insert in human body. The thermal oxidation process was selected to treat Co-Cr-Mo surface substrate. Firstly, Co-Cr-Mo alloy was heated in muffle furnace at constant temperature of 850°C with different duration of heating such as 3 hours and 6 hours in order to analyze the formation of oxide layer. The corrosion behaviours of untreated sample and oxidized sample were investigated utilizing potentiodynamic polarization tests in simulated body fluids (SBF). The Vickers hardness after corrosion testing was measured in order to evaluate the effect of thermal oxidation in reducing corrosion rate. Based on the results obtained it is clearly showed that substrates undergone thermal oxidation with 6 hours duration time performed better than 3 hours duration, with the hardness value 832.2HV vs. 588HV respectively. Dense oxide layer and uniform thickness formed on the oxidized substrates able to help in reducing the corrosion effects on Co-Cr-Mo alloy without degraded its excellent mechanical properties. The microstructures of oxidized substrates before and after corrosion test were also analyzed using FESEM images for better observations. It was determined that corrosion resistance of Co-Cr-Mo substrate can be increased with oxide layer formed on the alloys using thermal oxidation process.

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Surface Modification on CoCrMo Alloy to Improve the Adhesion Strength of Hydroxyapatite Coating

Cited by 30 publications

References 40 publications

Hydroxyapatite-Based Coating on Biomedical Implant

Hydroxyapatite-Based Coating on Biomedical Implant

Improving biocompatibility of cobalt based alloy using chemical etching and mechanical treatment

Thermal oxidation process improved corrosion in cobalt chromium molybdenum alloys

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