Abstract
In this study, we have analysed the effects of a silane coupling agent on the volume fraction of zirconia for digital light processing (DLP)-based additive manufacturing processes. Zirconia suspension was prepared by the incorporation of silane-modified zirconia particles (experimental group) or untreated zirconia particles (control group). Furthermore, the control and experimental group were subdivided into three groups based on the volume fraction (52, 54, and 56 vol%) of zirconia particles. The disk-shaped zirconia samples were 3D (three-dimensional) printed using the DLP technique and their physical and mechanical properties were evaluated. The addition of a silane coupling agent to the zirconia samples was found to have influence of about 6% on the hardness and biaxial flexural strength. Moreover, the decrease in minute air gaps inside the zirconia layers significantly increased the material density (visualized from the microstructure analysis). Thus, from this study, it was established that the silane-modified zirconia particles had a positive effect on the physical properties of the zirconia parts.
Highlights
Various materials have been used for prostheses in dental clinics, such as titanium, cobalt–chromium, zirconia, and glass ceramics [1,2,3,4,5,6,7]
This study demonstrated the effect of silane on the volume fraction of zirconia
The preparation with of a silane ever,In future experiments are neededoftozirconia evaluatesuspensions the dispersion of the the addition silane-modified zircoupling agent in for DLPassociated additive manufacconia particles the suspension byofvarying parameters with the turing technology has been demonstrated
Summary
Various materials have been used for prostheses in dental clinics, such as titanium, cobalt–chromium, zirconia, and glass ceramics [1,2,3,4,5,6,7]. These materials do not satisfy the physical properties, such as strength, required by dental clinics [1,2,3]. Several studies on zirconia have found that this compound enhances material fracture strength and biocompatibility; it has been widely applied as a material for dental clinic-fabricated prostheses and artificial joints [8]. CAD/CAM technology has been applied to clinic care for dental restorations employing zirconia. The fabrication of highly complex shapes using CAD/CAM is extremely difficult [10,11,12]. To overcome these disadvantages, research on additive manufacturing and formulations for additive manufacturing is actively being conducted. Recent research indicates that dental prostheses manufactured through additive manufacturing present acceptable density compared with those produced by milling or traditional methods [14,15,16,17,18]
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