Effect of Ambient Lights on the Accuracy of a 3-Dimensional Optical Scanner for Face Scans: An In Vitro Study.

Most 3D scanners use optical technology that is impacted by lighting conditions, especially in triangulation with structured-light or laser techniques. However, the effect of ambient lights on the accuracy of the face scans remains unclear. The purpose of this study is to investigate the effect of ambient lights on the accuracy of the face scans obtained from the face scanner (EinScan Pro 2X Plus, Shining 3D Tech.

Effects of different sulfuric acid etching concentrations on PEEK surface bonding to resin composite.

This study evaluated the effects of surface pretreatment with different concentrations of sulfuric acid etching on surface properties and bonding between Polyetheretherketone (PEEK) and a resin composite. Six groups of surface pretreatment (no pretreatment, etched with 70, 80, 85, 90, and 98% sulfuric acid for 60 s) were treated on PEEK. Surface roughness, scanning electron microscopy (SEM) and atomic force microscopy (AFM) analyses were examined.

Effect of surface pretreatments on resin composite bonding to PEEK.

This study evaluated the effect of surface pretreatments on resin composite bonding to polyetheretherketone (PEEK). Four groups of surface pretreatment (no pretreatment, etched with 98% sulfuric acid, etched with piranha solution and sandblasting with 50 µm alumina) were performed on PEEK. Surface roughness, Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analysis were examined.

Bone microarchitecture at oral implant sites in ectodermal dysplasia (ED): a comparison between males and females.

Objective: The aim of this study was to analyse the microarchitecture of bone in association with implant placement in young ectodermal dysplasia (ED) patients. The general hypothesis was that the structural and morphological features of bone microarchitecture are different between males and females, which may influence clinical outcomes.

Materials And Methods: The bone harvesting is not additionally invasive, as the procedure was made at the time and site of implant placement.

Ultramicroscopy of bone at oral implant sites: a comparison of ED and control patients. Part 1-defining the protocol.

Purpose: The aim of this study was to develop a protocol to analyze the microstructure of mandibular and maxillary bone in association with implant placement in ectodermal dysplasia (ED) and anodontia conditions compared to patients not suffering from such conditions.

Materials And Methods: This study was not additionally invasive, since the bone harvesting was completed at the time and site of implant placement. Bone samples were allocated into two groups (ED and control patients) and specified by the site of bone harvesting.