## 3 Initial Analysis of the Selected Articles  
The initial analysis of the selected articles (n = 19) should provide basic information about AM technologies, materials, and their parameters for a comparison and interpretation of the obtained results. Nano-material in dental implants from the aspect of composition and biofilm dynamics is presented by [PERSON] et al. [34]; the article considers the biocompatibility of the materials (the ability of the material not to damage the tissue when interacting with the tissue in the human mouth) used in the manufacture of dental implants; the authors performed a 14-day test to form a biofilm that mimics the existence of a natural microorganism to test the cytotoxicity of the tested samples, while DLP technology was used to create the samples. The design of a ceramic composite consisting of two novel components, fluorapatite glass-ceramic (FGC) and yttria-stabilized zirconia (YSZ), is presented by [PERSON] et al. [35]; both components are used for dental restoration with excellent results--to make better use of their advantages, the authors created a composite with improved mechanical properties, forming precision and tribological compatibility, while the stereolithography (SLA) technology was used to create the samples. The investigation of the selected alloy elements' effect in an additive manufactured Co-Cr alloy for dental prosthetics is presented by [PERSON] et al. [36]; the study deals with the influence of tungsten and molybdenum in terms of elements added to a Co-Cr alloy for the manufacture of dental implants. To form test samples, the authors used the laser powder directed energy deposition (LP-DED) process and commercially available Co-Cr-W and Co-Cr-Mo alloys; in addition, the structure and hardness of the samples and the obtained excellent results related to wear resistance were tested. The development of a Ti scaffold microstructure by laser powder bed fusion (LPBF) with chemical polishing is presented by [PERSON] et al. [37]; based on the patient's tooth defect model, the authors designed a titanium scaffold. The test samples were made using LPBF technology; the authors used a nitric acid mixed solution to enhance the surface roughness, and as a result, in vitro tests showed that the designed Ti scaffold has excellent biocompatibility with a complete absence of cytotoxicity. A feasibility study regarding 3D printing of ultra-thin veneers made of lithium disilicate using 3D printing technology is presented by [PERSON] et al. [38]; test samples with layer thicknesses of down to 0.2 mm were produced using lithography-based ceramic manufacturing (LCM) technology, where the gained thickness allowed for a true non-prep solution or minimally invasive preparation. The characteristics of a novel material--a ceramic-composite resin--that would be used to produce custom dental restorations are given by [PERSON] et al. [39]; the material is intended for SLA 3D printing, where the result would be a restoration with minimal waste. After testing, the tested material showed excellent wear resistance and biocompatibility. An application of the Taguchi method to optimize the FDM process parameters to reduce circularity error and the surface roughness of biomedical implants is given by [PERSON] et al. [40]; by testing samples obtained by 3D printing, the authors determined that printing speed, temperature, and layer thickness affect the quality of implants. The properties of zirconia-based pastes, for producing ceramics by 3D printing technology, were analyzed by [PERSON] et al. [41]; Direct Ink Writing (DIW) technology was used to obtain certain properties of zirconia ceramics. The resulting material with the desired mechanical and physical properties would be used for a dental prosthesis, while the tested material is characterized by a low cost and biocompatibility. The evaluation of photopolymer resins for dental prosthetics fabricated via the stereolithography process at different polymerization temperatures is given by [PERSON] et al.