Clinical and imaging aspects associated with persistent apical periodontitis: subsides for the treatment decision-making process.

Objectives: To evaluate cases of persistent apical periodontitis (PAP) and what are the imaging and clinical aspects that could be considered in the PAP diagnosis and in their treatment decision-making process.

Methodology: 423 patients with apical periodontitis at the time of non-surgical root canal treatment (NSRCT) were followed-up for at least 1 year. Periapical radiographic images were used to compare and determine periapical status at each time using the PAI scoring system.

Microtomographic Analysis of the Biomechanical Performance of Thermally Treated Instruments in Flattened and Curved Root Canals.

Introduction: This study aimed to evaluate, using microcomputed tomography, the impact of various mechanized systems on the geometry of the root canal system and dentin thickness in mandibular first molars. The hypothesis proposed that different systems would produce significant variations in root canal system preparation.

Methods: Mesial and distal canals of mandibular molars were selected and divided into 5 groups (n = 10) based on the system used: 2Shape (25.

Repopulation of a 3D simulated periapical lesion cavity with dental pulp stem cell spheroids with triggered osteoblastic differentiation.

We established a proof-of-concept model system for the biological healing of periapical lesions using stem cell spheroids. Mesenchymal stem cells from human exfoliated deciduous teeth (SHED) were cultured in a 2D monolayer and then as 3D multicellular spheroids. An image of a periapical lesion of an upper lateral incisor tooth was obtained by computed tomography and was used as a model for photopolymer resin 3D printing to generate a negative frame of the lesion.

E-cigarette exposure increases caries risk and modifies dental surface in an in vitro model.

Objective: Electronic cigarettes have become increasingly popular and can deliver nicotine at levels comparable to traditional tobacco cigarettes. However, the potential adverse effects of these alternative smoking devices on dental health remain uncertain. This study investigates changes in the cariogenic potential of tooth surfaces and analyzes alterations in the chemical composition of aerosols generated from sweet-flavored e-liquids used in electronic cigarettes.

Analysis of chemical and morphological properties of root dentine treated with a single multifunctional endodontic irrigant solution.

The aim was to evaluate the chemical, morphological aspects and microhardness of root dentin after treatment with Triton™ solution. Twenty blocks of root dentin were distributed in two groups (n = 10): Control (C) (2.5% NaOCl+17% EDTA+2.