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. 2024 Sep 26:30:e944051.
doi: 10.12659/MSMBR.944051.

Methods of Processing Dental Chromium-Cobalt Alloys for Production of Metal Frameworks Faced with Ceramics to Obtain the Best Mechanical Properties

Igor Wojciechowski  1 , Tomasz Klatkiewicz  1 , Agata Prylińska-Czyżewska  1 , Adrianna Borczyńska  1 , Weronika Jakubowska  2 , Mariusz Pryliński  1
Affiliations

Methods of Processing Dental Chromium-Cobalt Alloys for Production of Metal Frameworks Faced with Ceramics to Obtain the Best Mechanical Properties

Igor Wojciechowski et al. Med Sci Monit Basic Res. .

Abstract

BACKGROUND Modern prosthetic technologies make it possible to fabricate prosthetic restorations without material loss and to make prosthetic restorations with complex geometric shapes in a relatively simple way. One such technology is selective laser melting (SLM), or additive manufacturing of metal materials, better known as 3D printing from metal or selective laser melting, but currently the most commonly used method is casting. The present study investigated use of dental chromium-cobalt alloys for prosthetic bridges and compared methods of processing dental chromium-cobalt alloys to obtain the best mechanical properties. MATERIAL AND METHODS We used dental chromium-cobalt alloy (SCHEFTNER GMBH) for laser melting StarbondCoSEeasy Powder with grain size of 10-30 µm and StarbondCoS alloy casting, made in accordance with the European standard EN ISO 22674. SLM-made specimens and induction melted alloy castings were prepared for the study. A centrifugal casting system with induction current melting of the metal alloy was used to produce the samples. The melting and casting process is automatic and limits changes in chemical composition. RESULTS The results show that none of the samples changed their chemical composition, while the samples made by SLM had better mechanical properties. CONCLUSIONS The SLM technique makes it possible to produce restorations faster and cheaper without any loss of quality compared to restorations made with the casting technique. Casting technology reduces mechanical properties, but still provides good mechanical properties.

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Conflict of interest statement

Conflict of interest: None declared

Figures

Figure 1
Figure 1
Samples made of StarbondCoS alloy, (A) laser melted (the red one), (B) inductive cast (the green one).
Figure 2
Figure 2
A comparison of Rp0.2 and Rm between the tested materials.
Figure 3
Figure 3
Sample BB.903.0444-11922.012.001 (laser melted) in the non-etched state – tested area of porosity: (A) roller 1; (B) roller 2.
Figure 4
Figure 4
Sample BB.903.0444-11922.024.001 (inductively cast) in the non-etched state - tested area of porosity: (A) roller 1; (B) roller 2.
Figure 5
Figure 5
Sample BB.903.0444-11922.012.001 (laser melted) in the etched state.
Figure 6
Figure 6
Sample BB.903.0444-118922.024.001(induction cast) in the etched state.
Figure 7
Figure 7
Sites of analysis for the chemical composition of sample BB.903.0444-11922.024 (induction cast).
Figure 8
Figure 8
Hardness diagram for the cross-sections of the tested samples.
See this image and copyright information in PMC

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