Three-dimensional (3D) printing is increasingly being utilized in the dental field. After fabricating a prosthesis using 3D printed resin, post-curing process required to improve its mechanical properties, but there has been insufficient research on optimal conditions. We used various crown and bridge materials this study, evaluated changes their properties according time by evaluating flexural strength, Weibull modulus, Vickers hardness, color change, degree of conversion, biocompatibility....

In the absence of accurate medical records, it is critical to correctly classify implant fixture systems using periapical radiographs provide diagnoses and treatments patients or respond complications. The purpose this study was evaluate whether deep neural networks can identify four different types implants on intraoral radiographs. study, images 801 who underwent between 2005 2019 at Yonsei University Dental Hospital were used. Images containing following selected: Brånemark Mk TiUnite,...

Recent advances in three-dimensional (3D) printing have introduced new materials that can be utilized for dental restorations. Nonetheless, there are limited studies on the color stability of restorations using 3D-printed crowns and bridge resins. Herein, conventional computer-aided design/computer-aided manufacturing (CAD/CAM) blocks 3D-printing resins was evaluated assessed their degrees discoloration based material type, colorant types (grape juice, coffee, curry, distilled water (control...

With the development of nanotechnology, many researches have shown that nanometer‐scaled materials especially TiO 2 nanotube a positive effect on cellular behavior and surface characteristics implant, which are considered to be crucial factors in osseointegration. However, it has not yet been verified size is effective osseointegration vivo . The aim this study was evaluate implant surface‐treated with different nanotubes rat femur. customized implants (threaded nonthreaded type), diameter...

This study analyzed the surface roughness and waviness, Vickers hardness (VHN), color changes of six types 3D printed resins computer-aided design/computer-aided manufacturing (CAD/CAM) materials after artificial toothbrushing. The average height (Ra) change Formlabs denture teeth A2 resin (FMLB) was not significant between toothbrushing (0.17 ± 0.02 μm 0.17 0.05 μm, respectively; mean standard deviation). However, Ra value increased significantly in all remaining groups. Regarding...

The aim of this study was to compare the surface roughness zirconia when using Zircos E etching system (ZSAT), applying a nitric acid-hydrofluoric acid compound as pretreatment agent, and also shear bonding strength according different resin cements. ZSAT, air abrasion, tribochemical silicacoating were applied on prepared 120 specimens (10 mm in diameter, 7 height) CAD/CAM. Each 12 with 4 cements (Panavia F 2.0, Rely X Unicem, Superbond C&B, Hot bond) test interfacial bond strength....

The amount of photopolymer material consumed during the three-dimensional (3D) printing a dental model varies with volume and internal structure modeling data. This study analyzed how presence cross-arch plate influence accuracy 3D printed model. was designed U-shaped arch palate removed (Group U) or attached to area P), divided into five types. trueness precision were for comparisons models. Two-way ANOVA revealed that 135.2 ± 26.3 µm (mean SD) in Group U 85.6 13.1 P. Regarding structure,...

The properties of underlying substrates influence the quality an intraoral scan, but few studies have compared outcomes using common restorative materials. In this study, we aimed to compare accuracy digital and conventional impressions recorded for four different dental materials as substrates. Experimental crowns were produced with a metallic surface (gold or cobalt-chromium alloy (Co-Cr)) without (zirconia PMMA (polymethyl methacrylate)). A impression was made in group (CON group), gypsum...

The purpose of this study was to test heat-treatment methods for improving the cytocompatibility dental 3D printable photopolymer resins.Nextdent C&B resin and a digital light processing printer were used print all specimens, which divided into seven groups as follows: 1-month storage at controlled room temperature, 20 25 °C (RT), 24-hour RT, in RT water, 1-min immersion 80 100 5-min autoclaving. Cell viability tests, cytotoxicity confocal laser scanning microscopy performed analyze...

The aim of this study was to improve osteoblast function by delivering two growth factors, PDGF-BB and BMP-2, incorporated onto heparinized titanium (Hep-Ti) substrate. To achieve co-delivery the surface anodized Ti immobilized with heparin, then factors were coated Hep-Ti surface. Incorporation evaluated SEM XPS. Incorporated BMP-2 released from substrate in a sustained manner. In vitro studies revealed that osteoblasts grown on PDGF-BB- BMP-2-immobilized increased ALP activity, calcium...

Endodontic microsurgery is defined as the treatment performed on root apices of an infected tooth, which was unresolved with conventional canal therapy.Recently, advanced technology in 3-dimensional model reconstruction based computed tomography such cone beam has opened a new avenue application personalized, accurate diagnosis and been increasingly used field dentistry.Nevertheless, direct intra-oral localization apex information extremely difficult significant amount bone removal...

The present study aims to compare the accuracy of metal sleeve-free 3D-printed computer-assisted implant surgical guides (MSF group) (n = 10) with sleeve-incorporated (MSI 10). Implants diameter 4.0 mm and 5.0 were placed in left second premolars bilateral first molars, respectively, using a fully guided system. Closed-form sleeves used teeth on open-form right. weight differences before after placement, angular deviations placement measured. Weight compared Student’s t-tests Mann–Whitney...