Treatment of an Acute Apical Abscess in a Patient With Autoimmune Hepatitis Taking Alendronate: A Case Report.

Introduction: The aim of this study was to report a patient's clinical case who was diagnosed with severe apical abscess and with autoimmune hepatitis (AIH) using immunosuppressive drugs and bisphosphonate.

Methods: A 32-year-old man of black African descent urgently sought dental surgery because of an increase in volume in the right genic region and a nuisance in the region of the lower right second premolar when chewing. After intraoral and radiographic clinical examination, the patient was diagnosed with pulp necrosis and an acute apical abscess.

Canal Transportation, Centering Ability, and Dentin Removal after Instrumentation: A Micro-CT Evaluation.

Aim: The aim of this study is to evaluate and compare root canal transportation, centering ability, and amount of dentin removed after root instrumentation with different rotary and reciprocating systems, using micro-computed tomography (micro-CT).

Materials And Methods: Forty curved mesial canals of lower molars were selected and divided into four experimental groups ( = 10) according to the system used: protaper next (PTN), wave one gold (WOG), prodesign logic (LOG), and vortex blue (VTX). The roots were scanned before and after instrumentation using micro-CT, with a 16 μm isotropic resolution.

Sealing Capacity of Bulk-fill Resin in Endodontically Treated Teeth.

Aim: The objective of the study is to evaluate the cervicalapical sealing of bulk-fill flow resins associated with a universal adhesive system, in endodontically treated teeth, considering two methods of evaluation.

Materials And Methods: The samples used in the bacterial leakage analysis were autoclaved, filled inside a laminar flow chamber, and divided into four experimental groups (n = 8) according to the restorative material: Filtek Bulk-fill flow; Surefil SDR flow; TetricEvoflow and the positive control. The samples were inoculated with the ( every 7 days and the microleakage was evaluated on a daily basis for 60 days.

Physicomechanical and thermal analysis of bulk-fill and conventional composites.

The aim of this study was to evaluate the degree of conversion (DC) and the thermal stability of bulk-fill and conventional composite resins. Eleven composite resin samples were prepared to evaluate the DC, Vickers microhardness (VMH), mass and residue/particle loss, glass transition temperature (Tg), enthalpy, and linear coefficient of thermal expansion (CTE) using infrared spectroscopy (FTIR), microdurometer analyses, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dilatometry (DIL). The data were subjected to statistical analysis, with a significance level of 95%.

Does ferrule thickness influence resistance to fracture of endodontically treated teeth?

Background: Teeth with severe crown destruction and endodontically treated may or may not present a circular strip of dental tissue located in the cervical region called ferrule.

Aims: The aims of this study were to evaluate ferrule thickness influence on endodontically treated teeth (ETT) resistance to fracture.

Materials And Methods: A total of 30 bovine incisor teeth were selected, endodontically treated and randomly distributed, according to the ferrule thickness: G1- no ferrule, G2 - 1 mm, and G3 - 2 mm.

Physicomechanical characterization and biological evaluation of bulk-fill composite resin.

The aim of this study was to evaluate the cytotoxic effect, degree of conversion (% DC), Vickers hardness (VH), and surface morphology of composite resins. Eleven resins, nine bulk-fill resins, and two conventional resins were evaluated. Each material was sampled to evaluate DC (using FTIR), VH, cytotoxicity (using MTT and Neutral Red - NR test), surface morphology (using SEM and AFM), and organic filler (using EDS).

Universal cements: dual activated and chemically activated.

The aim of the present study was to assess the bond strength of universal cements cured either dually or chemically only. Three cements were assessed using different types of application: dual activated (DA) or chemically activated (CA). In total 80 dentin blocks were used, obtained through the enamel wear of the lingual and buccal surfaces of bovine incisors.