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Journal of Endodontics

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https://www.readbyqxmd.com/read/29336884/effect-of-torsional-and-fatigue-preloading-on-hyflex-edm-files
#1
Ya Shen, Charles Tra, Ahmed Hieawy, Zhejun Wang, Markus Haapasalo
INTRODUCTION: The purpose of this study was to evaluate the effect of a low amount of torsional preloading on the fatigue life and different degrees of cyclic fatigue on torsional failure of HyFlex EDM (EDM; Coltene-Whaledent, Allstetten, Switzerland) and HyFlex CM (CM; Coltene-Whaledent) instruments. METHODS: EDM and CM files were used. The fatigue resistance was examined in a 5-mm radius and 60° single curve, and the mean number of cycles to failure (Nf) was recorded...
January 12, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29336883/long-term-prognosis-of-pulpal-status-of-traumatized-teeth-exhibiting-contradictory-results-between-pulp-sensibility-test-and-ultrasound-doppler-flowmetry-a-retrospective-study
#2
So-Yeon Ahn, Dohyun Kim, Sung-Ho Park
INTRODUCTION: In this retrospective study, we investigated long-term (over 3 years) follow-up results of teeth that exhibited contradictory results between the pulp sensibility test (thermal or electric pulp test) and ultrasound Doppler flowmetry (UDF) until 1 year after trauma to inspect the prognosis of the pulp. METHODS: Data were collected from the records of trauma patients in our hospital between February 2012 and May 2015. The teeth that had continuously shown contrasting results on the pulp sensibility test and UDF until 1 year after trauma were chosen for the study...
January 12, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29336882/histobacteriologic-conditions-of-the-apical-root-canal-system-and-periapical-tissues-in-teeth-associated-with-sinus-tracts
#3
Domenico Ricucci, Simona Loghin, Lucio S Gonçalves, Isabela N Rôças, José F Siqueira
INTRODUCTION: This histobacteriologic study described the pattern of intraradicular and extraradicular infections in teeth with sinus tracts and chronic apical abscesses. METHODS: The material comprised biopsy specimens from 24 (8 untreated and 16 treated) roots of teeth associated with apical periodontitis and a sinus tract. Specimens were obtained by periradicular surgery or extraction and were processed for histobacteriologic and histopathologic methods. RESULTS: Bacteria were found in the apical root canal system of all specimens, in the main root canal (22 teeth) and within ramifications (17 teeth)...
January 12, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29336881/influence-of-contracted-endodontic-access-on-root-canal-geometry-an-in%C3%A2-vitro-study
#4
Mario Alovisi, Damiano Pasqualini, Edoardo Musso, Elena Bobbio, Carlotta Giuliano, Davide Mancino, Nicola Scotti, Elio Berutti
INTRODUCTION: Contracted endodontic cavities (CECs) have developed from the concept of minimally invasive dentistry and provide an alternative to traditional endodontic cavities (TECs). They have been designed in an effort to preserve the mechanical stability of teeth. The contracted cavity design preserves more of the dentin but may influence the geometric shaping parameters. The aim of this micro-computed tomographic study was to evaluate the influence of contracted endodontic cavities on the preservation of the original root canal anatomy after shaping with nickel-titanium rotary instruments...
January 12, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29336880/marginal-gaps-between-2-calcium-silicate-and-glass-ionomer-cements-and-apical-root-dentin
#5
Vladimir Biočanin, Đorđe Antonijević, Srđan Poštić, Dragan Ilić, Zorica Vuković, Marija Milić, Yifang Fan, Zhiyu Li, Božidar Brković, Marija Đurić
INTRODUCTION: The outcome of periapical surgery has been directly improved with the introduction of novel material formulations. The aim of the study was to compare the retrograde obturation quality of the following materials: calcium silicate (Biodentine; Septodont, Saint-Maur-des-Fosses, France), mineral trioxide aggregate (MTA+; Cerkamed Company, Stalowa Wola, Poland), and glass ionomer cement (Fuji IX; GC Corporation, Tokyo, Japan). METHODS: Materials' wettability was calculated concerning the contact angles of the cements measured using a glycerol drop...
January 12, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29336879/effect-of-dynamic-immersion-in-sodium-hypochlorite-and-edta-solutions-on-cyclic-fatigue-resistance-of-waveone-and-waveone-gold-reciprocating-nickel-titanium-files
#6
Gülşah Uslu, Taha Özyürek, Koray Yılmaz, Gianluca Plotino
INTRODUCTION: The purpose of this study was to evaluate the effect of sodium hypochlorite (NaOCl) and EDTA solutions on the cyclic fatigue resistance of WaveOne (WO) and WaveOne Gold (WOG) nickel-titanium reciprocating files. METHODS: A hundred WO (25/.08), and 100 WOG (25/.07) were randomly divided into 5 groups: group 1, no immersion; group 2, immersion in 5.25% NaOCl at 37°C ± 1°C for 5 minutes; group 3, immersion in 5.25% NaOCl at 37°C ± 1°C for 10 minutes; group 4, immersion in 17% EDTA at 37°C ± 1°C for 5 minutes; and group 5, immersion in 17 % EDTA at 37°C ± 1°C for 10 minutes...
January 12, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29336878/healing-of-periapical-lesions-after-endodontic-treatment-with-the-gentlewave-procedure-a-prospective-multicenter-clinical-study
#7
Asgeir Sigurdsson, Randy W Garland, Khang T Le, Shahriar A Rassoulian
INTRODUCTION: This report includes outcomes for a group of patients with significant periapical lesions who were treated and evaluated in two single-arm, multicenter, prospective, nonsignificant risk clinical studies. METHODS: Forty-five teeth were from 45 patients who met the inclusion criteria and consented for the clinical studies and were diagnosed with periapical lesions with periapical index score ≥3. Patients were treated with a standardized treatment protocol including instrumentation to an apical diameter of #20 without orifice enlargement, the GentleWave Procedure, and warm vertical obturation...
January 12, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306537/metformin-enhances-the-differentiation-of-dental-pulp-cells-into-odontoblasts-by-activating-ampk-signaling
#8
Wei Qin, Xianling Gao, Tao Ma, Michael D Weir, Jing Zou, Bing Song, Zhengmei Lin, Abraham Schneider, Hockin H K Xu
INTRODUCTION: Metformin is a first-line drug for treating type 2 diabetes that regulates the differentiation of mesenchymal stem cells. Its effects on human dental pulp cells (DPCs) remain unknown. This study aimed to investigate the effects of metformin on the proliferation and differentiation of DPCs. METHODS: A live/dead viability assay kit was used to examine the effects of metformin on the cell viability of DPCs. Cell proliferation was analyzed using a cell counting kit (CCK-8; Dojindo, Tokyo, Japan)...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306536/orthodontic-movement-after-regenerative-endodontic-procedure-case-report-and-long-term-observations
#9
Antonis Chaniotis
INTRODUCTION: Although regenerative treatment approaches in teeth with incomplete root formation and pulp necrosis have become part of the suggested therapeutic endodontic spectrum, little is known about the effect of orthodontic movement in the tissue that has been regenerated. Furthermore, as the number of adults undergoing orthodontic treatment increases, there is an increasing need to investigate the changes that these tissues may undergo during orthodontic movement. Here we describe the alterations observed after the application of orthodontic forces in a case of an apically root-fractured necrotic immature root that had been managed with regenerative endodontic procedures in the past...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306535/zoom-reconstruction-tool-evaluation-of-image-quality-and-influence-on-the-diagnosis-of-root-fracture
#10
Polyane Mazucatto Queiroz, Gustavo Machado Santaella, Ana Lúcia Alvares Capelozza, Pedro Luiz Rosalen, Deborah Queiroz Freitas, Francisco Haiter-Neto
INTRODUCTION: This study evaluated the image quality and the diagnosis of root fractures when using the Zoom Reconstruction tool (J Morita, Kyoto, Japan). METHODS: A utility wax phantom with a metal sample inside was used for objective evaluation, and a mandible with 27 single-rooted teeth (with and without obturation and with and without vertical or horizontal fractures) was used for diagnostic evaluation. The images were acquired in 3 protocols: protocol 1, field of view (FOV) of 4 × 4 cm and a voxel size of 0...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306534/low-environmental-temperature-influences-the-fatigue-resistance-of-nickel-titanium-files
#11
Ya Shen, Xiangya Huang, Zhejun Wang, Xi Wei, Markus Haapasalo
INTRODUCTION: The purpose of this study was to evaluate the effect of different temperatures (0°C, 10°C, 22°C, 37°C, and 60°C) on the cyclic fatigue life of nickel-titanium (NiTi) files using a new fatigue test model in zirconium oxide. METHODS: Three superelastic NiTi files (EndoSequence [Brasseler USA, Savannah, GA], ProFile [Dentsply Tulsa Dental Specialties, Tulsa, OK], and K3 [SybronEndo, Orange, CA]), and 3 heat-treated (K3XF [SybronEndo], Vortex [Dentsply Tulsa Dental Specialties], and HyFlex CM [Coltene-Whaledent, Allstetten, Switzerland]) NiTi files, all size 25/...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306533/microbial-analysis-of-endodontic-infections-in-root-filled-teeth-with-apical-periodontitis-before-and-after-irrigation-using-pyrosequencing
#12
Homan Zandi, Anne K Kristoffersen, Dag Ørstavik, Isabela N Rôças, José F Siqueira, Morten Enersen
INTRODUCTION: The root canal microbiota in root-filled teeth with post-treatment apical periodontitis before and after chemomechanical instrumentation and irrigation with either 1% sodium hypochlorite (NaOCl) or 2% chlorhexidine digluconate were analyzed by using the pyrosequencing method. METHODS: Samples from 10 root-filled teeth with apical periodontitis undergoing retreatment were taken before (S1) and after (S2) preparation using irrigation with either NaOCl (n = 5) or 2% chlorhexidine digluconate (n = 5)...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306532/association-between-apical-periodontitis-and-interleukin-gene-polymorphisms-a-systematic-review-and-meta-analysis
#13
REVIEW
Alessandro G Salles, Lívia A A Antunes, Erika Calvano Küchler, Leonardo S Antunes
INTRODUCTION: Genetic polymorphisms may result in altered gene expression or functional changes of the encoded molecules and could possibly generate a deficient immunity. Consequently, individuals with specific genotypes could be more susceptible to disease or could present an increase in disease severity. Our study is aimed to verify, through a systematic review and meta-analysis registered in the PROSPERO database (CRD42016043905), whether currently available evidence supports a relationship between interleukin gene polymorphisms and apical periodontitis (AP)...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306531/the-post-endodontic-adhesive-interface-theoretical-perspectives-and-potential-flaws
#14
REVIEW
Georgios Maroulakos, Jianing He, William W Nagy
INTRODUCTION: The aim of this review was to analyze the potential of successful bonds of endodontic posts to radicular dentin as well as the limitations of the post-endodontic adhesive interface. METHODS: The MEDLINE/PubMed and Web of Science electronic databases were searched. The search was augmented by a manual search of the pertinent bibliographies. RESULTS: The post-endodontic adhesive interface finds application in the endodontic cohesive units...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306530/evaluation-of-biocompatibility-and-osteogenic-potential-of-tricalcium-silicate-based-cements-using-human-bone-marrow-derived-mesenchymal-stem-cells
#15
Neha Sultana, Manisha Singh, Ruchika Roongta Nawal, Sarika Chaudhry, Seema Yadav, Sujata Mohanty, Sangeeta Talwar
INTRODUCTION: The success of endodontic regeneration lies in the appropriate combination of stem cells and bioactive materials. Several novel dental materials are available on the market in this regard. Hence, the current study aimed to evaluate the proliferation, differentiation, and osteogenic potential of human bone marrow-derived mesenchymal stem cells (hBMSCs) onto biomaterials like ProRoot MTA (MTA; Dentsply Tulsa Dental, Tulsa, OK), Biodentine (BD; Septodont, Saint Maur de Fosses, France), and EndoSequence Root Repair Material (ERRM; Brasseler USA, Savannah, GA)...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29306529/comparison-of-gap-volume-after-retrofilling-using-4-different-filling-materials-evaluation-by-micro-computed-tomography
#16
Sue Youn Kim, Hyeon-Cheol Kim, Su-Jung Shin, Euiseong Kim
INTRODUCTION: The purpose of this study was to evaluate the gap volume between dentin and root-end filling materials. METHODS: Four root-end filling materials were compared in the present study: ProRoot MTA (PRM; Dentsply Tulsa Dental, Tulsa, OK), MTA Angelus (MAG; Angelus, Londrina, Brazil), EndoCem MTA (ECM; Maruchi, Wonju, Korea), and RetroMTA (RTM; BioMTA, Seoul, Korea). Forty-eight single-rooted, extracted human teeth were instrumented with nickel-titanium instruments and oburated with gutta-percha...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29275854/edta-treatment-for-sodium-hypochlorite-treated-dentin-recovers-disturbed-attachment-and-induces-differentiation-of-mouse-dental-papilla-cells
#17
Kentaro Hashimoto, Nobuyuki Kawashima, Shizuko Ichinose, Keisuke Nara, Sonoko Noda, Takashi Okiji
INTRODUCTION: The disturbance of cellular attachment to dentin by sodium hypochlorite (NaOCl) may hamper pulp tissue regeneration. The aims of this study were to examine the recovering effect of EDTA on the attachment/differentiation of stemlike cells and to address the mechanisms of EDTA-induced recovery under the hypothesis that attachment to the exposed dentin matrix and the subsequent activation of integrin/phosphatidylinositol 3-kinase (PI3K) signaling play a crucial role. METHODS: Mouse dental papilla (MDP) cells were cultured on bovine dentin disks treated with NaOCl (0%, 1...
December 21, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29275853/fractographic-analysis-of-a-split-tooth-presenting-radiographically-as-a-horizontal-root-fracture-in-an-unrestored-mandibular-second%C3%A2-molar
#18
Unni Krishnan, Alex Moule, Shaji Michael, Michael Swain
INTRODUCTION: Spontaneously catastrophic fracture of intact unrestored molar teeth is not common. Nevertheless, cracks do occur that progress apically, resulting in the complete splitting of the tooth and root. This report describes a catastrophic fracture that occurred in an unrestored mandibular second molar resulting in a previously unreported combination of a longitudinal and horizontal root fracture, appearing radiographically as a single horizontal root fracture. METHODS: Tooth fragments were examined clinically, stereoscopically, and by scanning electron microscopy...
December 21, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29275852/required-time-for-migration-of-bone-marrow-derived-cells-to-dental-pulp-after-bone-marrow-transplantation
#19
Marcos Frozoni, Marcelo Rocha Marques, Rovilson Gilioli, Luiz Felipe Silva, Adriana de Jesus Soares, Alexandre Augusto Zaia
INTRODUCTION: This study aimed to evaluate the time required for bone marrow-derived cells (BMDCs) from transgenic green fluorescent protein (GFP)+ donor mice (GFP+ mice) to migrate into the dental pulp of wild-type GFP- recipient mice (GFP- mice) by using bone marrow transplantation (BMT) as an in vivo model for tracking BMDCs from GFP+ mice (GFP+ BMDCs). METHODS: GFP+ BMDCs were injected into irradiated GFP- mice. Maxillary arches, tibiae, and femora from GFP- mice were isolated and processed at 24 hours, 48 hours, 4, 7, and 14 days, and 7 weeks after BMT...
December 21, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29275851/biocompatibility-and-osteogenic-calcification-potential-of-casein-phosphopeptide-amorphous-calcium-phosphate-fluoride
#20
Alaa E Dawood, David J Manton, Peter Parashos, Rebecca H Wong, William Singleton, James A Holden, Neil M O'Brien-Simpson, Eric C Reynolds
INTRODUCTION: Casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and CPP-ACP with fluoride (CPP-ACFP) have been shown to provide bioavailable ions to promote mineralization. Hence, the aim of this study was to evaluate the materials' biocompatibility and osteogenic/calcification potential for endodontic applications. METHODS: Human and mouse osteoblast-like and fibroblast-like cell lines were incubated with 0.05%-3.0% w/v CPP-ACP and CPP-ACFP, and toxicity, proliferation, alkaline phosphatase, interleukin (IL)-1α, and IL-6 production, collagen type I, osteocalcin, and osteopontin production, and mineralization/calcification were determined...
December 21, 2017: Journal of Endodontics
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