This professional and life experience report happened to me 18months ago, when I woke up with the fixed idea of a new challenge,which was applying for a postdoctoral fellowship and livingabroad, far away from all I was surrounded by, such as family,home, university and friends. The project began from choosinga supervisor, a country, a city, a university and a line of researchthat would encompass a change, something that I could put intopractice and apply when I came back to Brazil. With the...

In spite of the dogmatic assertion according to which ‘ifa tooth has periapical lesion, there is no pulp vitality anymore’,it does not correspond to reality, as there are periapicallesions in which the carrier teeth remain with pulp vitality.To provide a basis for this thought, the present paperdiscusses: 1) The concept of true periapical lesion, 2) Thedifferences between apex and periapex, 3) The distinctionbetween apical pericementum and apical periodontium,and 4) Considerations about...

Objective: To evaluate in vitro the microleakage in complexcavities sealed with temporary restorative materials(TRM). Methods: The cavities were prepared in 60maxillary premolars extracted from human beings, andthe specimens were divided into 3 groups: 1- IntermediateRestorative Material (IRM); 2- Coltosol; 3- Fill MagicTempo. Three teeth served as negative control and had nocavities prepared. Before sealing the cavities, a collagensponge was left within the pulp chamber for evaluation ofdye...

Objective: The purpose of this study is to evaluate if thephysicochemical properties are influenced by the processingsteps of cement production. The chemical composition,setting time, solubility, pH value and calcium ion releasedby Portland cement were measured through all stages ofthe manufacturing process (G1), as well as the cement thatwas obtained through the step of calcination (G2). Methods:The chemical composition was examined by energydispersive x-ray spectroscopy (EDS). Setting time...

Objective: The aim of this study was to evaluate thesemiquantitative composition, flexibility and microhardnessof endodontic instruments with conventional andCM NiTi alloy, and to evaluate the influence of continuousrotation and reciprocating movement on the static fatiguelife. Methods: Hyflex CM 40/0.04 and RaCe 40/0.04were submitted to cantilever-bending test, energy dispersiveX-ray spectroscopy and Vickers microhardness. Staticfatigue tests were performed under continuous rotation;150°...

Introduction: The complex anatomy of root canals,combined with repeated and/or inadequate use of instruments,can lead to their fracture. The aim of this studywas to demonstrate through 3 clinical reports a techniqueof fractured endodontic files removal, in different thirds ofthe root canal, through the association of hand files andultrasound. Methods: In these cases, three teeth withfractured files inside the root canals were treated similarly,through the association of manual endodontic...

Introduction: To describe the endodontic treatmentof lower incisors with pulp canal obliteration (PCO) andapical periodontitis after dental trauma and long-termorthodontic treatment. Methods: A female 22-year-oldpatient sought dental care at the endodontic centre reportingto have suffered a dental trauma in the antero-inferiorregion, followed by a 5-year orthodontic treatment.Two years after the conclusion of an orthodontic treatment,radiolucent lesions involving the lower central...

Introduction: The defect in the morphology of dens invaginatuscauses the lack of blood supply to the pulp andconsequent dental pulp necrosis, culminating in periapicallesion. Intervention with paraendodontic surgery is usualin these cases when conservative root canal treatment isunsuccessful due the complex anatomy and inaccessibilityof the pulp tissue. This case reports the successfulsurgical root canal treatment evidenced by Cone-BeamComputed Tomography in dens in dente (type III)...

Introduction: Pulp canal obliteration (PCO), is definedas a deposition of hard tissue within the root canalspace. This may occur idiopathically or following directpulp capping or trauma. In such situations, the clinicianmay be faced to a difficult or impossible to negotiate rootcanal and there is clearly a potential for a higher frequencyof treatment failures than normally is the case. Inthis complex scenario, the clinician must be prepared toemploy different approaches in order to save the...

Introduction: The location and cleaning of the middlemesial canal (MM canal) is important for the successfulendodontic treatment in mandibular molars. Objective:The aim was to evaluate the endodontic retreatment of amandibular molar presenting MM canal, which was monitoredby clinical, radiographic and tomographic assessments.Clinical case: Patient with previous satisfactoryendodontic treatment in tooth 36 presented fistula, periodontalpocket and furcation lesion next to mesial root....