Accuracy Analysis of Digital Models from Intraoral Scanners and 3D-Printed Casts in Children and Teenagers.

Purpose: The aim was to analyze the accuracy of digital models and 3D-printed casts from full-arch digital impressions using two intraoral scanners (iTero and Primescan).

Materials And Methods: A crossover reliability study was designed, scanning children and teenagers with iTero and Primescan. Accuracy was evaluated by measuring intercanine, intermolar, and ipsilateral canine-molar distances intraorally and comparing these measurements with those from plaster casts, digital models obtained with intraoral scanners, and 3D-printed casts.

Influence of Augmented Reality Appliances on Tooth Preparation Designs-An In Vitro Study.

The aim of this work was to analyze and compare the tooth structure removal between a free-hand preparation technique and a computer-aided preparation technique using an augmented reality appliance for complete-crowns preparation designs and "root mean square" (RMS) alignment value. Ten upper teeth representatives of all dental sectors were selected from a generic model library as "Standard Tessellation Language" (STL-1) digital files and 3D-printed in an anatomically based acrylic resin experimental model. Then these were randomly assigned to the following tooth preparation techniques: Group A: free-hand preparation technique ( = 5) (FHT) and Group B: computer-aided preparation technique using an augmented reality appliance ( = 5) (AR).

Intraoral scanners in children: evaluation of the patient perception, reliability and reproducibility, and chairside time-A systematic review.

Purpose: The aim of this systematic review is to evaluate the perception of the patient, the chairside time, and the reliability and/or reproducibility of intraoral scanners for full arch in pediatric patients.

Methods: A data search was performed in four databases (Medline-Pubmed, Scopus, ProQuest and Web of Science) in accordance with the PRISMA 2020 statements. Studies were classified in three categories (patient perception, scanning or impression time and reliability and/or reproducibility).

A retrospective study on the effect of the COVID-19 pandemic on dental treatments in adults.

Background: The aim was to analyze the prevalence of dental treatments that were not performed in a dental care university referral center in the capital of Spain during the first wave of the COVID-19 pandemic.

Methods: This was a retrospective observational study based on the registry of medical records. Sex, age, nationality, and the type of treatment that was not performed in the service of the Integrated Adult Dental Clinic subject of the Dentistry degree at the Rey Juan Carlos University of Madrid were analyzed.