Fabrication and characterization of remineralizing dental composites containing hydroxyapatite nanoparticles.

The aim of this study was to fabricate and characterize dental composites containing hydroxyapatite nanoparticles (HApNPs). Four dental composites were produced from the same organic matrix (70 wt% Bis-GMA and 30 wt% TEGDMA), with partial replacement of BaBSi particles (65 wt%) by HApNPs in the following concentrations (wt%): E0 (0) - control, E10 (10), E20 (20) and E30 (30). Ca and PO release was evaluated in solutions with different pHs (4, 5.

Does the Misfit Volume of Prosthetic Crowns Differ Before and After Ceramic Application? An In Vitro Radiographic Microtomography Analysis.

Purpose: To estimate the misfit volume of zirconia vs metal-ceramic crowns.

Materials And Methods: Five specimens were fabricated from zirconia and five from nichrome (metal-ceramic). Microcomputed tomography techniques were used to obtain volumetric reconstructions of misfit volume before and after ceramic application.

Reciprocating instrumentation in a maxillary primary central incisor: A protocol tested in a 3D printed prototype.

Background: Efficient endodontic instrumentation of primary teeth is a challenge for paediatric dentists.

Aim: To evaluate biomechanical outcomes of endodontic instrumentation with a reciprocating system in a polymer-prototyped primary maxillary central incisor.

Design: The specimen was systematically instrumented and micro-CT scanned before and after each file.

Mineral density changes in bovine carious dentin after treatment with bioactive dental cements: a comparative micro-CT study.

Objectives: To evaluate the potential of conventional glass ionomer cement (GIC), Biodentine™, MTA, and Portland cement to induce mineral density changes in carious dentin compared to zinc oxide eugenol control cement (ZOE).

Materials And Methods: Fifty blocks of bovine root dentin were prepared and a biofilm model using ATCC strains of S.mutans, S.

The Influence of Dentin Age and the Presence of Cracks in Removal of the Root Filling Material.

Introduction: This study evaluated the removal of the filling material during endodontic retreatment considering the presence of cracks and the dentin age.

Methods And Materials: A total of 20 freshly extracted single-rooted teeth were categorized into the following two groups according to the age of the patients: Group Young (Y; aged 18-30 years) and Group Old (O; aged ≥60 years). Each tooth specimen was scanned by microcomputed tomography (micro-CT) subsequently after endodontic retreatment with the Reciproc instruments (REC).

Accuracy of visual and image-based ICDAS criteria compared with a micro-CT gold standard for caries detection on occlusal surfaces.

The aim of this study was to check the in vitro accuracy of ICDAS criteria on digital images compared to visual examination for the diagnosis of occlusal caries against a micro-CT gold standard. ICDAS was scored in 40 extracted permanent molars by means of visual inspection and stereomicroscopic images. Visual examinations were performed in duplicate and at a one-week interval by three different calibrated examiners.