Mechanical properties, corrosion resistance, and anti‐adherence characterization of pure titanium fabricated by casting, milling, and selective laser melting

Abstract

Milling and selective laser melting (SLM) technology have become new options for removable partial denture (RPD) processing. However, whether milling and SLM technology has an impact on the properties of RPD remains unclear, which is also the aim of our study. To investigate the effects of milling and SLM technology on pure titanium, mechanical property, corrosion resistance, and antiadherence of specimens were evaluated, and specimens processed by lost-wax casting were used as control. Compared with casting and milling groups, the SLM group showed enhanced Vickers hardness (402.1 ± 13.0 HV), tensile stress (694.4 ± 4.5 MPa), and larger electrochemical capacitance arc radius compared with casting and milling groups. A series of adhesion-related genes (Als1, Als3, and HWP1) of Candida albicans cultured on SLM specimens were upregulated for more than two times that of casting and milling groups. However, images from scanning electron microscopy and confocal laser scanning microscopy exhibited similar biofilm morphology and biomass of C. albicans on a titanium disk processed by casting, milling, and SLM. Dwindled water contact angle (64.7 ± 0.6 ) and higher TiO 2 constituents (40.82%) in the SLM group might lead to the incompatibility of genetic expression and biofilm generation. Our findings indicated that SLM is an ideal process to produce titanium dentures, providing a reference on the selection of processing technology for dentists.

Digital fabrication of complete dentures using a combination of additive and subtractive manufacturing technologies

“…Researchers found the better bacterial resistance of SLM fabricated titanium specimens than that of casting and milling titanium, because SLM group had more TiO 2 percentage (40.82%) than the casting (34.41%) and milling (34.74%) groups. And TiO 2 could effectively reduce the adhesion of microorganisms [ 15 , 16 ]. In a word, it is highly anticipated that SLM should an ideal process to produce titanium base plates for dentures.…”

Comparing the Cold, Warm, and Hot Deformation Flow Behavior of Selective Laser‐Melted and Electron‐Beam‐Melted Ti–6Al–2Sn–4Zr–2Mo Alloy

“…[2,4,5,13] Consequently, several studies have focused on comparing the mechanical properties of SLMed products with parts produced through traditional processes such as casting and forging. [14][15][16] In contrast, it is well documented that the as-built microstructure and performance of components differ between the EBM and SLM processes due to their inherent process variations. Therefore, this aspect should be considered an important factor, particularly when producing complex-shaped components.…”

Effect of Surface Textures and Fabrication Methods on Shear Bond Strength Between Titanium Framework and Auto-Polymerizing Acrylic Repair Resin

“…Such variation in grain size is assumed to produce different surface textures that could provide different mechanical interlocking patterns between repair resin and metal substructure. However, the effect of air abrasion with alumina particles on the metal surface is influenced by several factors, including the pressure applied during air abrasion and the metal surface hardness, which is material-dependent [11,12]. The surface hardness influences the penetration depth of alumina particles into the metal surface.…”

“…The surface hardness influences the penetration depth of alumina particles into the metal surface. Pure Ti is known to have low Vickers hardness ranging from 130 HV to 210 HV [5,11,12]. Ti hardness is also influenced by its fabrication method.…”