Dentistry is steadily evolving along the digital pathway at a constant and sure pace. Intraoral scanners (IOSs) started to enhance the precision and trueness of the restorations, making prosthodontics treatment more predictable. The objective of this study was to compare the trueness and internal fit of the printed provisional veneers for 60 preparations with three different types of finish lines. The abutments were scanned with the same intraoral scanner, and the resulting meshes were overlapped and analyzed in metrology software. The comparison was executed using two methods: (1) CAD (computer-aided design) designs vs. scanned veneers and (2) inverted surfaces of the preparations vs. scanned veneers. The butt joint preparation had the best trueness out of the three groups of preparation during both comparison methods, although there was no statistically significant difference between the butt joint and feather edge groups in the CAD design vs. scanned veneers analysis. Also, there was no statistically significant difference between palatal chamfer and feather edge groups in the scanned veneers vs. inverted surfaces of the preparations analysis.

Background: Three-dimensional (3D) facial scanning is an objective, non-invasive method for quantifying facial soft-tissue changes following complete denture (CD) rehabilitation. Reliable quantification of these changes in completely edentulous patients can support more predictable aesthetic and functional outcomes. Methods: This prospective before–after observational study included 30 completely edentulous patients (12 men, 18 women; age 48–87 years; mean ± SD: 67.8 ± 9.2 years) who received new maxillary and mandibular CDs. Structured-light 3D facial scans were obtained at baseline (edentulous, without dentures) and post-rehabilitation with dentures in place, in relaxed posture (RP) and maximal intercuspation (MI). Sixty-five validated anthropometric landmarks were analyzed. Primary outcomes were lower facial height (Sn-Gn), nasolabial angle (Cm-Sn-Ls), lower facial convexity (Ls-Li-Pg), mouth width (Ch-Ch), and upper vermilion height (Ls-Sto). Pre–post changes were assessed using paired-sample tests (p < 0.05). Results: Thirty-four of 65 parameters (52.3%) demonstrated significant post-treatment changes (p < 0.05), mainly in the perioral and lower facial regions. The reported parameters were selected due to their clinical relevance in evaluating perioral support and facial profile changes after complete denture treatment. In RP, upper lip thickness increased from 3.69 ± 0.97 mm to 4.96 ± 1.11 mm (Δ = +1.27 mm; p < 0.0001) and lower lip thickness from 6.18 ± 2.69 mm to 7.36 ± 1.52 mm (Δ = +1.18 mm; p = 0.0408). The nasolabial angle decreased from 116.08 ± 9.17° to 108.06 ± 9.56° (Δ = −8.02°; p = 0.0016). In MI, mouth width increased from 55.72 ± 3.43 mm to 57.97 ± 3.13 mm (Δ = +2.25 mm; p = 0.0102). Conclusions: Complete denture rehabilitation produces measurable, clinically relevant improvements in facial soft-tissue morphology in completely edentulous patients, particularly affecting lip support, mouth width, and the nasolabial profile. Structured-light 3D facial scanning provides a reproducible approach to objective outcome assessment and may support individualized denture design.

Background and Objectives: To evaluate and compare the accuracy (trueness and precision) and scanning speed of three intraoral scanners: Medit i700, Primescan 1, and COXO DL-300P, under standardized clinical conditions, using a digitized high-precision analog impression as the reference. Materials and Methods: A patient requiring fixed prosthetic treatment on natural abutments (2.5, 2.7, 3.5, 3.8) was selected. Ten sequential full-arch scans were performed with each scanner in rotating order. Scanning time was recorded for each full-arch acquisition. Accuracy analysis focused on regions of interest: the upper jaw included abutments with adjacent mucosa, the lower jaw included only abutment surfaces. A VPS impression was taken, poured in type IV stone, and digitized with a high-accuracy desktop scanner to serve as the reference. All datasets were analyzed in Geomagic Control X, and statistics were performed using MedCalc (α = 0.05). Results: Upper Jaw (Abutments and Mucosa): The Medit i700 achieved the highest trueness (100.3 ± 6.6 µm), outperforming Primescan and COXO (p = 0.008). COXO showed the best precision, while Primescan demonstrated the greatest variability (p < 0.0001). Primescan produced the fastest scans (72.5 ± 3.8 s) (p = 0.001). Lower Jaw: (Abutment Surface Only): Medit yielded superior trueness (193.1 ± 63.4 µm) compared with Primescan and COXO (p = 0.005). Precision varied significantly among devices, with COXO presenting the greatest inconsistency (p = 0.0004). Scan times did not differ significantly (p = 0.068). Conclusions: Medit i700 demonstrated the highest trueness, Primescan delivered the fastest scans but variable results, and COXO showed acceptable but inconsistent precision.

Background/Objectives: Tooth discoloration can influence the esthetic outcome of restorative treatments. Recently, 3D-printed ceramic-filled hybrid materials have been introduced for dental restorations using digital workflows. The aim of this in vitro study was to evaluate the influence of 3D-printed ceramic-filled hybrid veneers on the final color of discolored teeth using spectrophotometric measurements. Methods: Twenty-five extracted human anterior teeth without caries or restorations were prepared for veneer restorations using standardized reduction protocols. Artificial discoloration was induced by applying light-cured color coatings to the buccal surfaces of the specimens. The prepared teeth were digitally scanned, and veneers with a thickness of 1 mm were designed and fabricated using a 3D printing system and a ceramic-filled hybrid material. Color measurements were performed with a spectrophotometer and recorded in the Commission Internationale de l’Éclairage L*a*b* (CIELAB) color system. Measurements were obtained at four stages: after creation of discoloration, after two weeks of immersion in physiological saline solution, after veneer placement using neutral try-in gel, and after two months of immersion following veneer placement. Color differences were calculated using three color difference formulas (ΔE*ab, ΔE94, and ΔE00). Results: The placement of the 3D-printed veneers produced substantial modifications in the optical characteristics of the discolored substrates, reflected by reduced chroma values and significant color differences between the baseline and veneer stages. After two months of immersion, only minor variations in color coordinates were observed. The calculated color differences between the veneer stage and the post-immersion stage remained low across all evaluated color difference formulas, indicating good short-term color stability of the veneered specimens. Conclusions: Within the limitations of this pilot in vitro study, 3D-printed ceramic-filled hybrid veneers demonstrated the ability to effectively modify the color of discolored substrates while maintaining relatively stable optical properties after two months of immersion. These restorations may represent a promising and cost-effective option for the esthetic management of discolored teeth.