Structure and shear strength of implants with plasma coatings

Калита, В. И.; Mamaev, A. I.; Мамаева, В. А.; Маланин, Д А; Комлев, Д. И.; Gnedovets, A. G.; Новочадов, В. В.; Комлев, В. С.; Radyuk, A. A.

doi:10.1134/s2075113316030102

Cited by 20 publications

(10 citation statements)

References 44 publications

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“…Manley et al [ 36 ] found that the fatigue shearing strength of bead-sintered coating-substrate interfaces was similar to or less than that between coating and bone. An in vivo study found shearing strength at the bone-implant interface was between 4.25 and 7.81 MPa for plasma-sprayed, porous Ti coatings [ 31 ]. An in vitro analysis [ 24 ] of Ti porous coat-substrate interfaces found static shear strength to be greater than 20 MPa, on average; this same report showed the coating can withstand fatigue shear forces of 10 MPa for at least 10 7 cycles, per the ASTM F1160 standard [ 14 ].…”

Section: Discussionmentioning

confidence: 99%

Acetabular Debonding: An Investigation of Porous Coating Delamination in Hip Resurfacing Arthroplasty

Robinson

Gaillard-Campbell

Gross

2018

Advances in Orthopedics

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Background To date, there have been no published investigations on the cause of acetabular debonding, a rare failure phenomenon in metal-on-metal hip resurfacing where the acetabular porous coating delaminates from the implant while remaining well fixed to the pelvic bone. Purposes This study aims to summarize the current understanding of acetabular debonding and to investigate the discrepancy in rate of debonding between two implant systems. Patients and Methods To elucidate potential causes of debonding, we retrospectively analyzed a single-surgeon cohort of 839 hip resurfacing cases. Specifically, we compared rate of debonding and manufacturing processes between two implant systems. Results Group 1 experienced significantly more cases of debonding than Group 2 cases (4.0% versus 0.0%, p value<0.0001). Implant manufacturing processes differed in surface coating, heat treatment, postmanufacturing treatment, and apex thickness. Debonded implants were more likely to have missed RAIL guidelines (p=0.04). Conclusions We identified implant system, postoperative time, and acetabular component placement as variables contributing to rate of debonding. We recommend minimizing acetabular inclination angle according to RAIL guidelines. Further, we evaluated manufacturing differences between the two implant systems but did not have access to proprietary data to identify the cause of debonding. Both implants met ASTM standards, yet only the Group 1 implant debonded. This suggests the second implant had greater fatigue shear strength. Because the Group 2 implant achieved a more durable interface that did not debond, we suggest the ASTM F1160 standard for fatigue shear strength be increased to that achieved by its manufacturer. Level of Evidence II A retrospective evaluation of prospectively collected data.

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Section: Discussionmentioning

confidence: 99%

Acetabular Debonding: An Investigation of Porous Coating Delamination in Hip Resurfacing Arthroplasty

Robinson

Gaillard-Campbell

Gross

2018

Advances in Orthopedics

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“…Therefore, a relatively new method of valve metals surface refinementthe method of electrolytic plasma refinement (EPR) is of interest. The EPR is peculiar to the surface micro discharge involvement into the process of surfacing, having a substantial specific effect on the surfaces under development [1][2][3][4][5][6][7].…”

Section: исследование физико-механических свойств оксидных покрытий нmentioning

confidence: 99%

Physical and mechanical properties investigation of oxide coatings on titanium

Ramazanova¹,

Zamalitdinova²

2019

KIMS/CUMR/MShKP

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This paper studies the impact of rapidly flowing impulse effect of electrolytic plasma oxidation on physical and mechanical specifications of oxide coatings through the surface modification of VT1-0 titanium alloy. The present mode allows obtaining dense coatings with high mechanical properties. The electrolytic plasma oxidation process implementation leads to micro arc-discharge emergency in a short period through the small duration values of 250 µs anodic impulse. The achieved oxide coatings have high wearing features. Frictional testing resulted in wearing features increase in 4-15 times comparing to the sample off coating at to15 µm oxide layer thickness. Friction coefficient curves of oxide coating samples have shown no destruction of the coating to the bottom. A run-in area is recognized on the curves; sliding surfaces adapt to each other and pass to the stable friction regime. The later leads to the friction coefficient reduce and wear intensity reduction.

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“…Given this, the method of plasma electrolytic oxidation (PEO), a relatively new method used to treat the valve metals surface, is of interest [1][2][3]. A characteristic feature of PEO is the use of surface microdischarges to form a coating having a very significant and specific effect on the coating formed [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Study of the Properties of Qxide Coatings Formed on Titanium by Plasma Electrolytic Oxidation Method

Ramazanova¹,

Zamalitdinova²

2020

Eurasian Chem. Tech. J.

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The development of the modern industry requires to develop high-performance, environmentally friendly methods for the production of light structural material surface coatings. The use of products and structures made of titanium and its alloys with high wear resistance and corrosion resistance prevails in many industries, in particular in the aerospace industry, shipbuilding, and transport engineering. Nowadays, the application of the plasma electrolytic oxidation method, a promising metal surface treatment method, is of increasing interest. Besides this method is called microarc oxidation. The objective of this work is to study the properties of oxide coatings obtained on titanium alloys under the influence of rapid pulsed effects of the plasma electrolytic oxidation process. Oxide composite coatings were obtained in various electrolyte solutions in this work. Oxide coatings are characterized by high wear resistance. It has been established in tribological tests that the wear resistance of the coating is increased by 2-15 times compared with an uncoated sample. The friction coefficient curves obtained for coated samples show that there is no destruction of the coating to the base. The breaking-in area is marked in the curves. The friction surfaces are adjusted to each other and go to a stable friction mode. The latter results in the friction coefficient decrease and wear rate decrease.

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Structure and shear strength of implants with plasma coatings

Cited by 20 publications

References 44 publications

Acetabular Debonding: An Investigation of Porous Coating Delamination in Hip Resurfacing Arthroplasty

Acetabular Debonding: An Investigation of Porous Coating Delamination in Hip Resurfacing Arthroplasty

Physical and mechanical properties investigation of oxide coatings on titanium

Study of the Properties of Qxide Coatings Formed on Titanium by Plasma Electrolytic Oxidation Method

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