Amongst the most revolutionary materials ever introduced in Endodontics is Mineral Trioxide Aggregate (MTA). MTA is a biomaterial widely used to seal communications between the pulp cavity and the outer surface of the root. The advent of MTA constitutes a key advance in restorative dentistry given its diverse indications, namely, pulp protection, retrograde obturation, incomplete rhizogenesis and perforation repair.

There is no inflammatory lateral periodontal cyst on the lateral side of the roots, in the same manner as an apical periodontal cyst forms from an immunogenic periapical granuloma. Lateral periodontal cyst is a developmental cyst derived from dental lamina remnants located in the periodontal ligament with limited growth and no inflammatory nature. The involved tooth features pulp vitality and the treatment of the lesion does not require a therapeutic endodontic approach, but only its surgical...

Objective: The objective of the present study was to evaluate the influence of the glide path length on the apical volume and limit of root canal fillings using PathFile instruments. Methods: Thirty-four root canals from seventeen mesial roots of mandibular molars were divided into two groups based on the glide path length created using #13, #16, and #19 PathFile instruments: Group 1 (G1) – full root canal length; Group 2 (G2) – 1 mm short of the apical foramen. Next, the root canals...

Introduction: The aim of this study was to evaluate the antimicrobial activity of 1% sodium hypochlorite, 2% chlorhexidine and 24% EDTA, all in the gel form on oral biofilm. Methods: Sterile bovine dentin blocks were allocated on an intraoral device that was used by a volunteer for 3 days. After biofilm formation, the blocks were immersed in 100 μl of evaluated substances, for 5 minutes. After treatment, the samples were stained with 50 μl of a solution of SYTO 9 / propidium iodide and...

Objective: The aim of this study was to evaluate the influence on radiopacity of AH Plus and Endofill sealers used in single cone obturation of simulated canals. Methods: Twenty resin blocks with simulated curved root canals were prepared until F3 ProTaper rotary instrument. After the final irrigation, the canals were dried with paper points and a F3 gutta-percha point was inserted into the canal, and then a digital radiography was taken for each sample. Two experimental groups (n = 10) were...

Objective: The aim of this study was to evaluate the influence on radiopacity of AH Plus and Endofill sealers used in single cone obturation of simulated canals. Methods: Twenty resin blocks with simulated curved root canals were prepared until F3 ProTaper rotary instrument. After the final irrigation, the canals were dried with paper points and a F3 gutta-percha point was inserted into the canal, and then a digital radiography was taken for each sample. Two experimental groups (n = 10) were...

Introduction: The fracture of an endodontic instrument represents a serious risk to the continuity of the endodontic treatment. Several factors contribute to the occurrence of fractures such as erroneous cinematic, exaggerated pressure and torsion movement, repetitive use of endodontic instruments, metal fatigue, and lack of knowledge about the anatomy of the root canal system. When an instrument fracture happens, there are the options of maintaining the fragment within the canal, or...

Objective: This study evaluated the torsional fracture strength of two brands of machined NiTi instruments with different geometric shapes and produced with different metal alloys. Material and Methods: Fifteen WaveOne Large and fifteen ProTaper F4 instruments were selected and subjected to mechanical torsion, Vickers microhardness and toughness test. In the torsion test, angular deformation until fracture and maximum torque were evaluated. The fractured surfaces and helical rods of the...

Instrument fracture during endodontic therapy is an undesirablecomplication, which can lead to treatment failure.When this happens, it requires further planning of the case,aiming at a change of conduct in order to remove or surpassthe instrument. It is important at this time the professional’sknowledge of numerous techniques and masteryof instruments to execute them. In this study, a literaturereview was carried out in which it was concluded that theremoval of fractured instruments in...

Introduction: One of the main advantages of the moleculardiagnostic methods is detecting microorganismsusing the bacterial DNA, leading to a more accurate microbialcharacterization. Objective: This paper aims to studythe bacterial diversity present in primary and secondary/persistent endodontic infections, comparing the profile ofthe existing microbial communities before and after endodontictherapy. Methods: Microbiological samples werecollected using sterile/non-pyrogenic paper points in...

Objective: The aim of this study was to investigate in vitro the flow rate of the following commercially available root canal sealers: Endofill, AH Plus®, MTA Fillapex®, Sealer 26 and Pulp Canal Sealer EWT. Material and Methods: The sealers were manipulated according to manufacturer recommendations. The flow rate was determined in accordance with ADA (American Dental Association, 1993) specification # 57. In comparing the groups ANOVA (analysis of variance) was performed, and subsequently,...

Objective: this study evaluated by scanning electron microscopy (SEM) the sealer capacity of dentinal tubules of teeth treated endodontically using different chelating solutions. Materials and Methods: The root canals were irrigated with 2.5% sodium hypochlorite (NaOCl), replaced every instrument and filled. The auxiliary solutions used with a passive ultrasonic irrigation (PUI) for 1 minute were: 70% ethanol (control); 10% citric acid; 17% EDTA; and 0,2% chitosan. The roots were split...