## 3 Initial Analysis of the Selected Articles
[42]; the purpose of this in vitro study was to evaluate the mechanical properties of test samples printed with SLA technology. Test samples in the form of dental prosthetics made of photopolymer were produced at three different temperatures, and as the result, the obtained samples had excellent biocompatibility and wear resistance. The fabrication of color-graded feldspathic dental prosthetics for aesthetic and restorative dentistry is presented by [PERSON] et al. [43]; the study refers to the feasibility investigation of natural teeth shades replication on dental prosthetics. The samples were made using functionally graded additive manufacturing (FGAM) technology, while feldspathic porcelain (FP) and yttrium aluminum garnet cerium were used for dental restoration; the applied method was expensive, while the quality of the printed samples was satisfactory. The marginal and internal fit of provisional crowns made using two 3D printing technologies were analyzed by [PERSON] et al. [44]; using SLA and DLP technologies, 60 test samples of temporary crowns were made. The authors used liquid resin for SLA, while for DLP they used PMMA, and as a result, the tests have shown that crowns produced by DLP have lower precision than crowns produced by SLA. A novel commercially pure titanium alloy for dental prosthetic applications was presented by [PERSON] et al. [45]; using LDED technology, the authors printed samples of the new alloy, after which they compared the characteristics of the samples obtained with samples made using traditional milling. The samples made with the new titanium alloy have better characteristics than traditional milling technology, with lower production costs because the obtained sample does not have to be post-processed. A comparison of test samples made through 3D printing--using SLS and CNC milling technology, for the purpose of application for dental implants and abutments--was performed and presented by [PERSON] et al. [46]; the authors used a Titanium-TiteAl4V alloy to make the test samples due to its corrosion resistance and good biocompatibility properties. Samples made through 3D printing are more precisely made with lower production costs because the obtained dental implant does not have to be processed afterwards. The fabrication of a customized tooth crown using 3D printing technology is presented by [PERSON] et al. [47]; FDM technology and materials--polyethylene terephthalate glycol (PETG, black in color) and polycyclohex dimethylene terephthalate glycol-modified (PCTG, white in color)--were used to fabricate the samples. Using the aforementioned technology and materials, the authors created a multipurpose tooth filling/tooth cap slurry and the resulting samples were tested with the Fourier transform infrared (FTIR) spectrum and an in vitro anti-bacterial study. The fabrication of dental restorative prostheses from metal materials and powdered polymers, using laser-assisted additive technologies, is presented by [PERSON] et al. [48]; the authors used SLS technology and Co-Cr alloys to create samples--dental prostheses--which they compared with samples produced by DLP technology and DruckWege Type D Dental resin material. The resulting dental prostheses are very precisely made, during production it is not necessary to use supports (aswith 3D printing technologies for thermoplastic materials) and no subsequent processing of those parts is necessary, which affects the total production costs. An in vitro study where a new and effective method for producing 3D-printed zirconia laminates in dental restorative prostheses using DLP technology is described and presented by [PERSON] et al. [49]; the authors performed the Shapiro-Wilk, Kolmogorov-Smirnov, and Mann-Whitney tests, and as a result, the gap between the zirconia laminates produced using DLP printing and the subtractive manufacturing method significantly differed only at the mesioincisal measurement point. The effects of surface preparation methods on the color stability of 3D-printed dental restorations is presented by [PERSON] et al.