Characterization of the interface between cast-to Co-Cr implant cylinders and cast Co-Cr alloys

Özkömür, Ahmet; Uçar, Yurdanur; Ekren, Orhun; Shinkai, Rosemary Sadami Arai; Teixeira, Eduardo Rolim

doi:10.1016/j.prosdent.2015.07.021

Cited by 6 publications

(7 citation statements)

References 18 publications

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“…The main limitation of their use is the ability to disintegrate under long mechanical effects (friction, erosion, etc.) [[7], [8], [9]]. Stainless steel alloys are characterized by high strength and low cost, for example, compared to cobalt-chromium and titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

Modification of titanium surface via Ag-, Sr- and Si-containing micro-arc calcium phosphate coating

Sedelnikova

Комарова

Sharkeev

et al. 2019

Bioactive Materials

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The current research is devoted to the study of the modification of the titanium implants by the micro-arc oxidation with bioactive calcium phosphate coatings containing Ag or Sr and Si elements. The coatings’ microstructure, phase composition, morphology, physicochemical and biological properties were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). Ag-containing and Sr-Si-incorporated coatings were formed in alkaline and acid electrolytes, respectively. The formation of the coatings occurred at different ranges of the applied voltages, which led to the significant difference in the coatings properties. The trace elements Ag, Sr and Si participated intensively in the plasma-chemical reactions of the micro-arc coatings formation. Ag-containing coatings demonstrated strong antibacterial effect against Staphylococcus aureus AТСС 6538-P. MTT in vitro test with 3T3-L1 fibroblasts showed no cytotoxicity appearance on Sr-Si-incorporated coatings.

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Section: Introductionmentioning

confidence: 99%

Modification of titanium surface via Ag-, Sr- and Si-containing micro-arc calcium phosphate coating

Sedelnikova

Комарова

Sharkeev

et al. 2019

Bioactive Materials

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“…The different abutment types and casting technics may influence the implant/abutment adaptation [ 16 , 17 ]. Castable abutments may or may not have a metal base in the region of adaptation to the implant and the casting may be made by induction or by the lost wax technique [ 2 , 15 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Implant—Abutment Misfit after Cyclic Loading: An In Vitro Experimental Study

Vasconcelos

Matos²,

Queiroz³

et al. 2022

Materials

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This study aimed to evaluate the influence of thermomechanical cycling (TMC) and type of abutment on the misfit and compressive strength of the implant–abutment interface. Forty 3.75-mm external hexagon implants with 25° angled abutments were divided into four groups (N = 10). Group A: overcast plus TMC; Group B: overcast without TMC; Group C: completely cast plus TMC; Group D: completely cast without TMC. Abutments were fixed to the implants with 32-Ncm torque, and groups A and C specimens were cyclically loaded at 80 N with 2 Hz for 1 million cycles. The misfit on the implant–abutment interface was evaluated by optical microscope (100×) and the compressive strength test was performed in a universal test machine. For statistical analysis, a two-way ANOVA and post hoc Tukey test were used. There was no difference in misfit presented by all the abutments in the absence of TMC (p > 0.05). When TMC was performed, the completely cast abutments showed greater misfit than overcast ones (p = 0.001). Regarding compressive strength, irrespective of TMC performed, the overcast abutments showed higher compressive strength values than completely cast abutments (p = 0.003). Moreover, disregarding the type of abutment used, the absence of TMC provided higher compressive strength values (p < 0.001). It was concluded that thermomechanical cyclic loading aggravated the misfit, especially in completely cast abutments, regardless of material or fabrication technique, and reduced the compressive strength of the two types of abutments tested.

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“…These alloys are used as a prosthetic handle material in knee joints with high resistance to fatigue and tensile strength, arm, hip and leg construction where artificial joint construction load requires more. It is seen that the production technique of bio metallic alloys has significant effects on the microstructure and grain size of metals [10][11][12][13]. Microstructure and grain size have been suggested by researchers to have a significant effect on the mechanical properties of metals.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Icrostructure, Mechanical and Temperature Effects on Biomedical Co-25Cr-9,5W-3,5Mo-1Si Alloys Fabricated by Additive Manufacturing

Aygul¹,

Yalçinkaya²,

Şahin³

2019

Preprint

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The Wolfram (W), Silicium (Si) and Molybdenum (Mo) doped Co-Cr biomedical alloy were fabricated by additive manufacturing method, which is part of powder metadology. The mixture of Wolfram (W), Silicium (Si), Chrome (Cr) and Cobalt (Co) alloy is known good wear and corrosion resistance among of biomedical applications. By addition of Molybdenum (Mo) into the structure of alloy, the structure become more stbale also increase the corrosion and wear resistance. In addition, the effects of secondary annealing process on the alloy were investigated. The microstructure of the produced alloy was analyzed by X-ray diffraction method XRD, Energy Dispersive X-Ray Analysis EDX and scanning electron microscope SEM. Moreover, Electrochemical corrosion test, micro hardness and density measurements were performed to investigate the mechanical properties of the alloy. As a result of the analyzes, the effects of Molydenum (Mo) doped and secondary annealing on the microstructure and mechanical properties of bioalloying were determined.

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Characterization of the interface between cast-to Co-Cr implant cylinders and cast Co-Cr alloys

Cited by 6 publications

References 18 publications

Modification of titanium surface via Ag-, Sr- and Si-containing micro-arc calcium phosphate coating

Modification of titanium surface via Ag-, Sr- and Si-containing micro-arc calcium phosphate coating

Implant—Abutment Misfit after Cyclic Loading: An In Vitro Experimental Study

Investigation of Icrostructure, Mechanical and Temperature Effects on Biomedical Co-25Cr-9,5W-3,5Mo-1Si Alloys Fabricated by Additive Manufacturing

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