Effect of sterilization processes on the properties of a silane hybrid coating applied to Ti6Al4V alloy

Baldin, Estela Kerstner; Garcia, Charlene Silvestrin Celi; Henriques, João Antônio Pêgas; Ely, Mariana Roesch; Birriel, Eliena Jonko; Brandalise, Rosmary Nichele; Malfatti, Célia de Fraga

doi:10.1557/jmr.2017.429

Cited by 11 publications

(10 citation statements)

References 64 publications

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“…The increase in surface roughness provides more surface area which leads to more gas pockets getting entrapped and lower contact angles as a result, according to ref. 25 and 26 . This is in agreement with our data after the incorporation of 1000 mg L −1 and 2000 mg L −1 of HA nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Silane coatings modified with hydroxyapatite nanoparticles to enhance the biocompatibility and corrosion resistance of a magnesium alloy

2021

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Section: Resultsmentioning

confidence: 99%

Silane coatings modified with hydroxyapatite nanoparticles to enhance the biocompatibility and corrosion resistance of a magnesium alloy

2021

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“…It evidences even more the effect of the sterilization processes on the electrochemical behavior of the samples. e degradation behavior previously observed (Figure 9(b)) most likely contributed to the increase in the permeability of the electrolyte through the coatings, leading to the formation of corrosion products on the metallic substrate, Ti6Al4V alloy [16,52], which, consequently, caused the blockage of the surface defects and the reduction of the current density developed in the anodic sweep. In addition, the reduction of current density on the surface caused by the deposition of the apatite layer formed on the coatings, corroborating the findings on bioactivity behavior (Figures 6 and 7), can be related mainly to the Ti6Al4V/TM/TM HA/AC sample.…”

Section: Electrochemical Propertiesmentioning

confidence: 79%

“…is suspension was subsequently agitated for 24 hours until the deposition of the hybrid coating on a metallic substrate of Ti6Al4V, already coated with a protective coating, was obtained, according to the methodology by Baldin et al [16]. e deposition of the coating was performed by the dipcoating technique (Marconi, Brazil), with the application of a single layer of sol, with velocities of entrance and withdrawal of the suspension of 18 cm•min −1 and immersion time of 5 minutes [7].…”

Section: Obtaining the Hybrid Coating With Hydroxyapatitementioning

confidence: 99%

“…In this context, Walke et al [15] showed the compromise of the corrosion resistance of a coating formed by TEOS and TMOS silanes on stainless steel (316L). Baldin et al [16] observed that different sterilization processes caused alterations in the electrochemical properties and biocompatibility behavior with MG-63 cells for the silane coating composed of TEOS and MTES applied on the Ti6Al4V alloy. However, there is a lack of studies on the influence of sterilization on the osseointegration process for hybrid bioactive silane coatings.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sterilization on the Properties of a Bioactive Hybrid Coating Containing Hydroxyapatite

Baldin

Malfatti

Rodói

et al. 2019

Advances in Materials Science and Engineering

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The objective of this study was to evaluate the influence of sterilization on a hybrid coating obtained from a sol composed of alkoxysilane tetraethoxysilane (TEOS) and organoalkoxysilane methyltriethoxysilane (MTES) containing 10% (mass) of hydroxyapatite particles. The coating was obtained by dip coating, by applying two layers (protective/bioactive), which were cured at different temperatures (450°C and 60°C). The effects of sterilization on the superficial, electrochemical, bioactive, and mechanical properties of the coating were evaluated by performing different sterilization processes, namely, steam autoclave, hydrogen peroxide plasma, and ethylene oxide. Subsequently, the coating was characterized by using scanning electron microscopy (SEM/FEG), and FTIR measurements were performed to characterize the chemical structure. The bioactivity and degradability of the coating were analyzed by mass variation after immersion in SBF and X-ray diffraction (XRD) analysis. The electrochemical behavior was assessed by open circuit potential (OCP) and potentiodynamic polarization curves and the mechanical behavior by wear resistance. Results showed that all sterilization processes caused significant morphological changes in the hybrid coating. The autoclaved sample presented the highest structural chemical changes, and, consequently, the highest degradability, even though it had a superior bioactive behavior in relation to the other samples. In addition, the sterilization processes influenced the electrochemical behavior of the hybrid coating and altered the mechanical resistance to abrasion, thus presenting lower wear performance in relation to the nonsterilized sample.

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“…In each group, eight implant samples were sonicated to lyse bacteria and used for bacterial count. Since the choice of sterilization methods may cause changes in the chemical structure of the coatings and their bioactivity behavior, [15] coated titanium pins were sterilized with ethylene oxide. Pressurized steam was used for the sterilization of uncoated pins.…”

Section: Methodsmentioning

confidence: 99%

Silver ion doped hydroxyapatite-coated titanium pins prevent bacterial colonization

2021

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Objectives This study aims to evaluate the effectiveness of silver ion doped calcium phosphate-based ceramic nano powder-coated titanium pins in preventing bacterial colonization. Materials and methods A total of 66 titanium pins were divided into three groups of 22 implants. The first group was coated with silver ion doped calcium phosphate-based ceramic powder by using electrospray method. The second group was coated with pure hydroxyapatite (HA), and the remaining pins were used without any coating. The remaining 22 pins were used without any coating. Staphylococcus epidermidis clinical isolate was used for the study. Each pin was placed in 1¥104 CFU/mL bacterial suspension containing tube and at 24 h quantitative culture of bacteria on the broth and on the pins were performed. Free silver ions were determined by atomic absorption method. The antibacterial culture tests were repeated on Day 2 and Weeks 2, 4, 6, and 8. Results Bacterial growth was statistically higher in broth containing uncoated pins, compared to broth media containing silver ion doped HA-coated, and pure HA-coated pins at 24 h (p=0.036 and p=0.009, respectively). The release of bacteria from silver doped HA-coated pins was statistically less, compared to pure HA-coated pins and uncoated pins (p=0.039 and p=0.002, respectively). No significant differences were observed between the HA-coated and uncoated pin groups. Minimum inhibitory concentration levels for silver ion doped powder was 8 μg/mL for coagulase-negative Staphylococcus. No free silver ions were detected in the broth media. Conclusion Silver ion doped nano size calcium phosphate-based powder-coated titanium pins reduced the bacterial colonization significantly. Using silver ion doped materials in the body can be a good option to prevent from implant related infections.

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Effect of sterilization processes on the properties of a silane hybrid coating applied to Ti6Al4V alloy

Abstract: Abstract

Cited by 11 publications

References 64 publications

Silane coatings modified with hydroxyapatite nanoparticles to enhance the biocompatibility and corrosion resistance of a magnesium alloy

Silane coatings modified with hydroxyapatite nanoparticles to enhance the biocompatibility and corrosion resistance of a magnesium alloy

Effect of Sterilization on the Properties of a Bioactive Hybrid Coating Containing Hydroxyapatite

Silver ion doped hydroxyapatite-coated titanium pins prevent bacterial colonization

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