Mechanical performance of apatite/TiO2 composite coatings formed on Ti and NiTi shape memory alloy

Sun, Tao; Wang, Min

doi:10.1016/j.apsusc.2008.06.070

Cited by 20 publications

(10 citation statements)

References 10 publications

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“…We acknowledge that movement in the hip implant may best be simulated by fretting wear 37. However, the current study uses ball‐on‐disk wear technique, which is an accepted technique, because several researchers have used ball/pin as counter surface along a circular track to evaluate wear characteristics of HA 38–42. Our experiments were conducted in dry condition as opposed to physiological solution because dry condition is mechanically more aggressive to evaluate wear and would provide a conservative estimate of the wear resistance.…”

Section: Resultsmentioning

confidence: 99%

Wear behavior and in vitro cytotoxicity of wear debris generated from hydroxyapatite–carbon nanotube composite coating

Lahiri

Benaduce

Rouzaud

et al. 2010

J Biomedical Materials Res

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This work evaluates the effect of carbon nanotube (CNT) addition to plasma-sprayed hydroxyapatite (HA) coating on its tribological behavior, biocompatibility of the coating, and cytotoxicity of CNT-containing wear debris. Biological response of the CNT-containing wear debris is critical for osteoblasts, the bone-forming cells, and macrophages, the cells that clear up wear debris from blood stream. The addition of 4 wt % CNTs to HA coating reduces the volume of wear debris generation by 80% because of the improved elastic modulus and fracture toughness. CNT reinforcement has a pronounced effect on the particle size in the wear debris and subsequent biological response. There was a slight increase in the numbers and viability of osteoblasts grown on HA-CNT compared with HA alone. The cytotoxic effect of HA and HA-CNT debris to macrophages and osteoblasts was similar, demonstrating that loose CNT does not pose a problem to these cells.

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Section: Resultsmentioning

confidence: 99%

Wear behavior and in vitro cytotoxicity of wear debris generated from hydroxyapatite–carbon nanotube composite coating

Lahiri

Benaduce

Rouzaud

et al. 2010

J Biomedical Materials Res

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“…19 There have been many studies on coating implants with a bioactive surface that reduces Ni ion release and improves biocompatibility for nickel allergen patients. 22 In these studies, TiN, 23,24 TiO 2 , 21,25 Ti, 26,27 and hydroxyapatite 28 coatings have been applied for this purpose using different methods. TiN differs from the others in terms of better mechanical properties and biocompatibility; 29 a passive TiO 2 film is formed during its formation.…”

Section: Introductionmentioning

confidence: 99%

“…There have been many studies on coating implants with a bioactive surface that reduces Ni ion release and improves biocompatibility for nickel allergen patients . In these studies, TiN, , TiO 2 , , Ti, , and hydroxyapatite coatings have been applied for this purpose using different methods. TiN differs from the others in terms of better mechanical properties and biocompatibility; a passive TiO 2 film is formed during its formation. , In a review study, del Castillo et al, investigating TiN coating specific to dental implants, reported that TiN coatings reduce early bacterial colonization and biofilm formation and improve fibroblast cell attachment and adhesion .…”

Section: Introductionmentioning

confidence: 99%

Determination of the Effect of TiN Coating on Self-Fitting Properties of Dental Implants Made of NiTi Alloy

Korkmaz

Sağlam

2022

ACS Biomater. Sci. Eng.

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Design and material research continues to increase dental implants’ success rates, which is a widely applied treatment type. The size and morphology of the implant–bone interface are essential for implant stability. Our study produced a dental implant with two artificial tooth roots from NiTi alloy to increase the implant–bone contact surface. The properties of NiTi alloy, such as transformation temperature and composition, were determined by material characterization tests. Using NiTi alloy’s shape memory effect, these artificial roots at body temperature were programmed with appropriate heat treatments for the self-fitting feature. Dental-implant-like models are coated with TiN to prevent Ni ion release. The corrosion tests were performed in Ringer’s solution to determine the effect of TiN coating on Ni ion release. The nickel ion emission values showed that the TiN coating inhibited the release. In addition, it was determined that the TiN coating increased the shape memory transformation time of the NiTi alloy. In in vitro tests of NiTi and TiN-coated NiTi implants, it was observed that they completed self-fitting by deforming the trabecular bone, but the placement in the cortical bone was not complete. During the use of a shape memory implant, it should complete its transformation without contacting the cortical bone and should not cause a stress concentration.

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“…For example, hydroxyapatite (Ca 5 (PO 4 ) 3 OH) and other calcium phosphate coatings have been developed in order to promote the attachment of bone tissue and enhance the interface bonding of Nitinol surfaces for orthopedic applications [13,14]. However, although these coatings can improve the surface bioactivity of NiTi alloys, low bonding strength with the underlying metal and deformation capacity are major concerns over its long-term usage [15,16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of hybrid micro/nano-structured NiTi surfaces by a combination of etching and anodizing

et al. 2014

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The purpose of this study was to generate hybrid micro/nano-structures on biomedical nickel-titanium alloy (NiTi). To achieve this, NiTi surfaces were firstly electrochemically etched and then anodized in fluoride-containing electrolyte. With the etching process, the NiTi surface was micro-roughened through the formation of micropits uniformly distributed over the entire surface. Following the subsequent anodizing process, self-organized nanotube structures enriched in TiO2 could be superimposed on the etched surface under specific conditions. Furthermore, the anodizing treatment significantly reduced water contact angles and increased the surface free energy compared to the surfaces prior to anodizing. The results of this study show for the first time that it is possible to create hybrid micro/nano-structures on biomedical NiTi alloys by combining electrochemical etching and anodizing under controlled conditions. These novel structures are expected to significantly enhance the surface biofunctionality of the material when compared to conventional implant devices with either micro- or nano-structured surfaces.

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Mechanical performance of apatite/TiO2 composite coatings formed on Ti and NiTi shape memory alloy

Cited by 20 publications

References 10 publications

Wear behavior and in vitro cytotoxicity of wear debris generated from hydroxyapatite–carbon nanotube composite coating

Wear behavior and in vitro cytotoxicity of wear debris generated from hydroxyapatite–carbon nanotube composite coating

Determination of the Effect of TiN Coating on Self-Fitting Properties of Dental Implants Made of NiTi Alloy

Synthesis and characterization of hybrid micro/nano-structured NiTi surfaces by a combination of etching and anodizing

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