To evaluate the effectiveness of isopropyl alcohol, saline or distilled water to prevent precipitate formed between sodium hypochlorite (NaOCl) and chlorhexidine (CHX) its effect on bond strength an epoxy-based sealer in radicular dentine.The root canals 50 extracted human canines (n = 10) were instrumented. In G1, irrigated with 17% EDTA 2.5% NaOCl; G2, as except that 2% CHX was used final irrigant. other groups, intermediate flushes alcohol (G3), (G4) (G5) NaOCl CHX. The specimens...

The presence of residual endodontic sealer in the pulp chamber may cause discoloration dental crown and interfere with adhesion restorative materials. aim this study was to compare efficacy different solvents removing residues an epoxy resin-based (AH Plus) from dentin walls chamber, by scanning electron microscopy (SEM). Forty-four bovine incisor fragments were treated 17% EDTA 2.5% NaOCl. Specimens received a coating AH Plus left undisturbed for 5 min. Then, specimens divided four groups...

The aim of this study was to evaluate the persistence resin cement residues after dentin surface cleaning with different alcohol-based solutions or an essential oil (eucalyptol). Forty bovine teeth were sectioned in order expose pulp chamber be washed 1.0 mL 2.5% sodium hypochlorite (NaOCl), followed by 0.1 17% EDTA application for 3 min, and final irrigation NaOCl. specimens air dried resin-based rubbed onto dentine a microbrush applicator. After 15 scrubbed cotton pellet moistened...

Abstract Aim The aim of the present study was to evaluate effect three different formulations sodium hypochlorite on microhardness root canal dentin in cervical and apical segments. Methods Twenty‐four extracted human teeth had their roots sectioned along long axes a buccolingual direction. One half each selected, transversely resulting two segments, apical, with similar lengths. specimens were divided into groups ( n = 16), according formulation used: (a) group 1, 2.5% hypochlorite; (b) 2,...

Due to the low radiopacity of Sealer 26, iodoform is frequently empirically added this sealer. Thus, interference procedure with physicochemical properties 26 must be evaluated.This study evaluated influence addition on setting time, flow, solubility, pH, and calcium release an epoxy-based sealer.The control group was pure experimental groups were 1.1 g, 0.55 g or 0.275 iodoform. Setting time evaluation performed in accordance ASTM C266-03 speciflcation. The analysis flow solubility ISO...

Abstract This study evaluated the presence of residues after removal calcium hydroxide [Ca(OH) 2 ] associated with different vehicles. Thirty single‐rooted teeth were instrumented to a master apical file #25 using 2.5% NaOCl as main irrigant and 17% trisodium EDTA (ethylenediaminetetraacetic acid) final agent irrigant. Then, root canals dressed Ca(OH) silicone oil (Group 1), 2% chlorhexidine gluconate 2), or propylene glycol 3). After coronal sealing, all kept in moist environment at room...

This study investigated the flowability, setting time, pH, calcium release and bond strength of a MTA-based cement (MTA Fillapex(®)) compared to AH Plus Sealapex.For flowability test, ISO 6876:2001 specification was utilized for time ASTM C266-03 utilized. For pH measurements, 10 samples were prepared each group analyzed several different periods. push-out dentin disks distributed into three groups, according subgroups, root third (n = 10). After obturation, specimens underwent testing. The...

Recently, various calcium silicate-based sealers have been introduced for use in root canal filling. The MTA Fillapex is one of these sealers, but some its physicochemical properties are not accordance with the ISO requirements. Objective: aim this study was to evaluate flowability, pH level and release pure (MTAF) or containing 5% (MTAF5) 10% (MTAF10) hydroxide (CH), weight, comparison AH Plus sealer. Material Methods: flowability test performed according 6876:2001 For ion analyses, were...

The aim of this study was to evaluate the effect peracetic acid (PAA) as a single irrigant on smear layer, intraradicular dentinal bond strength, and penetrability an epoxy-based resin sealer into tubules. A total 120 roots were distributed 4 groups according used in root canal preparation: 1% PAA (PAA); 2.5% NaOCl followed by final irrigation with 17% EDTA (NaOCl-EDTA-NaOCl); (NaOCl); saline solution (SS). layer evaluated using scanning electron microscopy. strength (AH Plus) dentin...

Abstract The aim was to assess the effects of 1% peracetic acid (PAA) as a single endodontic irrigant on microhardness, roughness, and erosion root canal dentin, compared with 2.5% sodium hypochlorite (NaOCl) NaOCl combined 17% EDTA. Forty human, single‐rooted tooth hemisections were submitted Knoop microhardness test, before after following irrigation protocols: PAA = PAA; NaOCl; NaOCl‐EDTA‐NaOCl +17% EDTA +2.5% SS saline. Another 40 roots instrumented, irrigated same protocols, sectioned...

ABSTRACT Aim The aim of this study was to evaluate the fracture resistance teeth submitted several internal bleaching protocols using 35% hydrogen peroxide (35HP), 37% carbamide (37CP), 15% with titanium dioxide nanoparticles (15HPTiO2) photoactivated by LED-laser or sodium perborate (SP). Materials and methods After endodontic treatment, fifty bovine extracted were divided into five groups (n = 10): G1—unbleached; G2—35HP; G3—37CP; G4—15HPTiO2 G5—SP. In G2 G4, protocol applied in 4...

Teeth with open apices, such as in immature teeth or those apical root resorption are clinical cases difficult immediate resolution. With the use of mineral trioxide aggregate (MTA) dentistry, it was possible to optimize treatment time these by placement plug and canal filling. However, some negative effects can occur if MTA is extruded beyond apex. To avoid this accident, has been recommended an matrix prior MTA. This study reports two pulp necrosis apices. One case had apex due dental...

The aim of this study was to evaluate the persistence methacrylate-based cement residues on dentin, after dentin surface cleaning with ethanol or acetone, without previous application a adhesive. Forty bovine crown fragments were obtained and washed 1.0 mL 2.5% sodium hypochlorite (NaOCl), followed by 0.1 17% ethylenediaminetetraacetic acid for 3 min, final irrigation NaOCl. specimens air dried resin-based rubbed onto dentine microbrush applicator. In 20 specimens, previously cement,...

ABSTRACT The objective of this study was to describe the main lesions that simulate clinically and propose a treatment protocol for acute endodontic infection. Signs clinical symptoms periodontal abscess, gingival odontoma, herpes simplex, pericoronitis, pulpitis necrotizing ulcerative gingivitis/periodontitis (NUG/NUP) were described compared with infections. A by optimizing procedures in access cavity, microbial decontamination detoxification root canal, apical debridement, intracanal...

ABSTRACT Aim This clinical report presents a new method for retrieving separated instruments from the root canal with minimally invasive procedures. Background The presence of instrument in may interfere endodontic treatment prognosis. There are several recommended methods to retrieve instruments, but some difficult clinically practice. Case study describes two cases removal using stainless-steel prepared needle associated K-file. 1 presented fractured gutta-percha condenser within...

ABSTRACT Introduction The aim of this study was to evaluate the effects bleaching gel using 35% hydrogen peroxide (HP), associated with red carmine pigment (RC), in 3:1 or 1:1 ratio, on fracture resistance and dentin microhardness endodontically treated teeth. Materials methods A total 40 lower incisors were divided into four groups (n = 10), according protocol: G1 (HP3), HP + RC (3:1); G2 (HP1), (1:1); G3 (positive), 38% HP; G4 (negative), unbleached. Four dental sessions performed. crowns...

ABSTRACT Objective This study evaluated the flow, pH and calcium release of MTA Fillapex (G1) or plus 10% in weight hydroxide powder (G2), compared to AH Plus (G3) Sealapex (G4). Materials methods The flow test was performed according ISO 6876:2001 requirements. sealers were placed into plastic tubes immersed deionized water. After 24 hours, 7, 14 28 days, water each tube removed tested evaluate values level released calcium. Calcium analyzed statistically by Kruskal Wallis Dunn tests ANOVA...

Objetivo Avaliar o efeito da dentina sobre pH e a atividade antimicrobiana de formulações com hidróxido cálcio. Material método O das (G1- polietilenoglicol, G2- glicerina paramonoclorofenol canforado ou G3- clorexidina) foram analisados nas puras (G1A, G2A G3A) acrescidas em pó (G1B, G2B G3B). Tubos polietileno preenchidos uma imersos água destilada. foi analisado após 24 horas, 7, 14 21 dias. A avaliada Enterococcus faecalis (ATCC 29212), através do teste difusão ágar. Os resultados...

PURPOSE: To evaluate the effects of coronal leakage on concentration hydrogen ions (pH) and calcium release several hydroxide pastes, over different periods time. MATERIAL AND METHODS: Fifty extracted human mandibular central incisors (n=10) were instrumented up to F2 instrument assigned following intracanal dressing: G1- Calen, G2- Calen with 0.4% chlorhexidine (CHX), G3- Calcium camphorated paramonochlorophenol (CPMC) glycerin, G4- but temporary filling material maintained during all test...

PURPOSE: The purpose of this study was to evaluate the increase cervical area and dentin thickness in mesial distal walls canals from mandibular molars after use LA Axxess (LA), CP Drill (CP) Gates-Glidden (GG) rotary instruments. MATERIAL AND METHODS: Sixty root thirty first molar were sectioned 3 mm below cement-enamel junction, divided groups (n = 20 canals, each) according instrument used, images captured before pre-enlargement instrumentation. instrumented (mm2) removal (mm), at...