Some people, even today, mistake science foropinion. Even though the right to freedom of thoughtand expression is guaranteed by article 13 of the FederalConstitution, caution must be exercised in delicatemoments such as the one we are experiencing.The old popular rite used to say: “Against facts, thereare no arguments, even though you can argue withthe facts”. Science is science. Period.

What is your Educational and EndodonticTraining?I am the son of two teachers: my father, a math andsocial sciences teacher, and my mother, an elementaryschool teacher. I started elementary school in theMontessorian method in the city of São Paulo and finishedin Itapetininga-SP. My father, tireless in the teachingof mathematics, was essential in my training as athinker. My mother, a warrior, taught me a lot aboutresilience and passion for life. I finished high schoolin Avaré-SP using the...

New technologies have been incorporated into endodonticprotocols in order to facilitate or make the performance of theprofessionals who perform them easier or more efficient. Inthis perspective, foraminal electronic locators (LEFs) presentthemselves as almost indispensable tools for a correct determinationof the actual length of the ducts. The latter, in turn,is of vital importance so that endodontic procedures are moreaccurate and are limited to the extensions desired by the endodontist,not...

Introduction: The success of an endodontic treatmentdepends primarily on cleaning and shaping of the rootcanal system. Therefore, the anatomy of the root canalsystem should be known in detail. However, this anatomyis complex and varies morphologically in different populations.This study evaluated the root canal anatomy ofmandibular premolars in a Brazilian population using conebeam CT (CBCT). Methods: CBCT axial, coronal andsagittal slices of 426 mandibular premolars were analyzed.Number of...

Introduction: We evaluated the effect of individual andcombined use of 18% etidronate (HEBP) in root canalsmear layer removal using scanning electron microscopy(SEM). Methods: Thirty human single-rooted teeth wereused. The roots were prepared with ProTaper UniversalSystem rotary files and randomly divided into three groupsaccording to the irrigation protocol used. G1: 2.5% sodiumhypochlorite (NaOCl) and 17% ethylenediaminetetraaceticacid (EDTA); G2: 2.5% NaOCl and 18% HEBP;and G3: 2.5% NaOCl...

Objectve: This study evaluated the flexural strength andmarginal adaptation of Clip F (CF), Bifix Temp (BT), Systemp.onlay (SO), Fill Magic Tempo (FT) and Provi MasterF (PF) in endodontically-treated coronal dentin. Methods:Firstly, ten specimens of each restorative material wereprepared, and submitted to flexural strength test using eletromechanicaltesting machine. Then, the pulp chamberof 50 maxillary premolar were restored using one of theprovisional restorative materials (n = 10) in...

Objective: The objective of this study was to analyze,in micro-CT, the capacity of different methods for insertionof calcium hydroxide paste in the filling of lateralcanals simulated in blocks of acrylic. Methods: A totalof 72 acrylic blocks with lateral canals simulated in thecoronal, middle and apical portions, were used and filledwith calcium hydroxide paste, according to the followingmethods (n = 12): Group 1 - #30 K-file; Group 2 -Lentulo spiral; Group 3 - Ultrasonic agitation; Group 4-...

The aim of this study was to evaluate the effect of ultrasonicactivation and MTA vehicle on dentinal pH insimulated external root resorptions. So, a cavity was preparedin the root of forty-six bovine teeth. They were filledwith MTA mixed with 100% distilled water (DW) or MTAmixed with 80% DW and 20% propylene glycol (PG).Teeth were divided into four groups (n = 10), accordingto the vehicle (DW or PG) and ultrasonic protocol usedfor material insertion (activated or not). Control group (n= 6) was...

Objective: The aim of this study was to evaluate theinfluence of rotational speed on the cyclic fatigue resistanceof Logic 25.06 rotary instruments (LOG 25.06; EasyEquipamentos Odontológicos, Belo Horizonte, Brazil).Methods: 20 Logic 25.06 instruments were used (n=20).The cyclic fatigue test was performed in an artificial canalmade of stainless steel with 60° of curvature and 5 mmof radius. The instruments were activated 950 and 550rotations per minute (RPM) until the fracture occurred.The...

Introduction: Patients undergoing dental bleaching relateto postoperative sensitivity, that is linked to hydrogen peroxide(H2O2) penetrating on the dental pulp. This study evaluatedthe anti-inflammatory effect of ibuprofen, Otosporin®,and curcumin gel on the pulp of the rats’ teeth after bleaching.Methods: Fifty rats were divided into CG: controlplacebogel; BLE: bleached (35% H2O2, 30 minutes); BLE-I:bleached and ibuprofen oral administration (twice every 12hours in 2 successive days);...

Morphological changes in teeth may adversely affect thesuccess of endodontic treatment. The upper lateral incisorsare characterized by the presence of a canal and asingle root. Several studies have reported variations in thenumber of roots and canals. A careful interpretation of radiographsunder enhanced illumination and magnificationis of extreme importance for detecting these anatomicvariations. this report aimed to describe a clinical case ofunusual endodontic retreatment of an upper...

Introduction: The thorough knowledge of the internalanatomy of tooth is one of the determining factors for thesuccess of endodontic treatment. Three-rooted secondmaxillary premolars represent a rare occurrence during endodontictreatment, making its description in the literature animportant contribution. This paper describes the endodontictreatment of maxillary second premolar with three separatedroot canals. Case report: The patient exhibited aright maxillary second premolar affected by...

This paper describes an unusual case of right maxillarycanine with two roots. This is the fourth finding thathas been reported in the literature. A 66-year-old femalepatient was referred to endodontic treatment inthe tooth #13. Clinical evaluation showed that tooth#13 presented no response after the vitality test. Radiographswere taken and revealed that the tooth #13presented two roots. Then, the patient was submittedto endodontic treatment. This case report is relevantbecause it describes...