scholarly journals The bond strength of dental porcelain to cobalt-chromium alloys fabricated by casting, milling and by selective laser melting: a comparative analysis

2019 ◽  
Vol 53 (6) ◽  
pp. 845-852
Author(s):  
M. Antanasova ◽  
A. Kocjan ◽  
B. Žužek ◽  
S. Jovanovski ◽  
P. Jevnikar
Keyword(s):  
Comparative Analysis ◽  
Bond Strength ◽  
Selective Laser Melting ◽  
Cobalt Chromium ◽  
Laser Melting ◽  
Dental Porcelain ◽  
Chromium Alloys

Bond strengths of porcelain to cobalt-chromium alloys made by casting, milling, and selective laser melting

2017 ◽  
Vol 118 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Jieyin Li ◽  
Chaojie Chen ◽  
Juankun Liao ◽  
Lang Liu ◽  
Xiuhua Ye ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Cobalt Chromium ◽  
Laser Melting ◽  
Chromium Alloys ◽  
Bond Strengths

Adhesion of dental porcelain to cast, milled, and laser-sintered cobalt-chromium alloys: Shear bond strength and sensitivity to thermocycling

2014 ◽  
Vol 112 (3) ◽  
pp. 600-605 ◽  
Author(s):  
Josep Serra-Prat ◽  
Jordi Cano-Batalla ◽  
Josep Cabratosa-Termes ◽  
Oscar Figueras-Àlvarez
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Cobalt Chromium ◽  
Dental Porcelain ◽  
Chromium Alloys

scholarly journals Bond strength of porcelain to cobalt chromium dental alloy fabricated by selective laser melting and casting methods

2017 ◽  
Vol 10 (3) ◽  
pp. 424-430
Author(s):  
Fariborz Vafaee ◽  
Farnaz Firouz ◽  
Parisa Alirezaii ◽  
Kusha Gholamrezaii ◽  
Sara Khazaei
Keyword(s):  
Bond Strength ◽  
Selective Laser Melting ◽  
Dental Alloy ◽  
Cobalt Chromium ◽  
Laser Melting

Surface Formation Mechanisms in Selective Laser Melting of Cobalt-Chromium-Molybdenum Powder

2020 ◽  
Vol 839 ◽  
pp. 73-78
Author(s):  
Alexander A. Saprykin ◽  
Yuriy P. Sharkeev ◽  
Natalya A. Saprykina ◽  
Egor A. Ibragimov
Keyword(s):  
Selective Laser Melting ◽  
Marangoni Effect ◽  
Powdered Material ◽  
Formation Mechanisms ◽  
Cobalt Chromium ◽  
Laser Melting ◽  
Movement Velocity ◽  
Surface Formation ◽  
Preheating Temperature ◽  
Cobalt Chromium Molybdenum

Selective laser melting (SLM) is a manufacturing technology of metal parts of any shapes with target mechanical properties by means of laser melting. This paper discusses the effect of SLM parameters: laser output power, laser movement velocity, scanning pitch and preheating temperature of a powdered material on surface formation mechanism, namely, its physical configuration when melting cobalt-chromium-molybdenum powdered material Со28Cr3Mo. The study points at structural differences of melted surfaces even under identical process parameters. Several types of surface formation are identified, e.g. homogenous melt, coagulated particles, and shapeless particles. Vapor pressure, Marangoni effect, and heat effect of a melted powder are stated to be key reasons for rough surface. This research is of high importance for understanding the effect of SLM parameters on formation of a target quality surface, positive stability and repeatable accuracy of the process.

Effect of oxidation heat treatment on the bond strength between a ceramic and cast and milled cobalt-chromium alloys

2015 ◽  
Vol 123 (4) ◽  
pp. 297-304 ◽  
Author(s):  
Jieyin Li ◽  
Xiuhua Ye ◽  
Bohua Li ◽  
Juankun Liao ◽  
Peilin Zhuang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Bond Strength ◽  
Cobalt Chromium ◽  
Chromium Alloys

Mechanical Properties and Microstructural Characterization of Cobalt-Chromium (CoCr) Obtained by Casting and Selective Laser Melting (SLM)

2017 ◽  
Vol 899 ◽  
pp. 534-539 ◽  
Author(s):  
Marcello Vertamatti Mergulhão ◽  
Carlos Eduardo Podestá ◽  
Maurício David Martins das Neves
Keyword(s):  
Mechanical Properties ◽  
Selective Laser Melting ◽  
Rupture Strength ◽  
Chemical Properties ◽  
Optical Microscope ◽  
Tensile Yield Strength ◽  
Cobalt Chromium ◽  
Laser Melting ◽  
Standard Samples ◽  
Casting Technique

The aim of this study is the consolidation of Cobalt-Chromium (CoCr) alloy powder using the additive manufacturing - selective laser melting (SLM) and the investment casting techniques. The research of this study has been applied to their biomaterial applied to development of prosthesis and dental implants. The gas atomized powder are spherical (mean diameter equal to 42,74 μm) and was analyzed by their physical and chemical properties. The microstructure of the powder and specimens was evaluated using optical microscope (OM) and scanning electron microscope with energy-dispersed X-ray spectroscopy (SEM-EDS). The mechanical properties were evaluated of standard samples using a tensile (yield strength, maximum tensile, rupture tensile and elongation), three point bending (transverse rupture strength) and micro hardness tests. The mechanical results indicate higher values for the SLM than casting specimens. The micrographs revealed a characteristic morphology of laser been used in the SLM technique and the dendrites in the casting technique. The microstructure of samples made by SLM is thinner than the samples obtained in the cast.

scholarly journals Comparison of Marginal Integrity and Surface Roughness of Selective Laser Melting, CAD-CAM and Digital Light Processing Manufactured Co-Cr Alloy Copings

2021 ◽  
Vol 11 (18) ◽  
pp. 8328
Author(s):  
Abdulaziz S. Alqahtani ◽  
Abdullah M. AlFadda ◽  
Malek Eldesouky ◽  
Mazen K. Alnuwaiser ◽  
Samar Al-Saleh ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Cobalt Chromium ◽  
Laser Melting ◽  
Digital Light Processing ◽  
Group 4 ◽  
Cad Cam ◽  
Ct Analysis ◽  
Group 3 ◽  
Group 2 ◽  
Cast Technique

The purpose of the present study was to evaluate the influence of fabrication techniques on the surface micro-roughness (Ra) and marginal misfit of cobalt chromium (CoCr) copings. A mandibular first molar was prepared for a metal ceramic crown. Forty metal copings were prepared and divided into groups (n = 10). Group 1, Casting-Lost wax technique (Cast-LWT), Group 2, CAD-CAM, Group 3, Selective laser melting (SLM), and Group 4, Digital light processing-Cast (DLP-Cast). Ra was measured using laser profilometry and marginal misfit was analyzed with Micro-CT. Analysis of variance (ANOVA), Tukey multiple comparison, and correlation coefficient tests were applied (p < 0.05). SLM technique showed the highest Ra (2.251 ± 0.310 μm) and the Cast-LWT group presented the lowest Ra (1.055 ± 0.184 μm). CAD-CAM copings showed statistically lower Ra compared with SLM samples (p = 0.028), but comparable Ra to DLP-Cast (p > 0.05). CoCr copings fabricated from the DLP-Cast technique demonstrated the highest marginal misfit (147.746 ± 30.306 μm) and the lowest misfit was established by SLM copings (27.193 ± 8.519 μm). The SLM technique displayed lower marginal misfit than DLP-Cast and CAD-CAM (p = 0.001), but comparable misfit to Cast-LWT copings. Ra influenced the marginal misfit in CAD-CAM, SLM, and DLP-Cast technique-fabricated copings. (p < 0.01). Marginal misfit and Ra of CoCr copings are contingent on the different fabrication techniques.

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