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Journal of Endodontics

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https://www.readbyqxmd.com/read/28104322/effect-from-rotational-speed-on-torsional-resistance-of-the-nickel-titanium-instruments
#1
Jung-Hong Ha, Sang Won Kwak, Sung Kyo Kim, Asgeir Sigurdsson, Hyeon-Cheol Kim
INTRODUCTION: The purpose of this study was to evaluate differences in torsional resistance using up-regulated speed of rotational spindle. METHODS: Three NiTi rotary instrument systems were selected in this study: K3XF (SybronEndo, Glendora, CA), BLX (B&L Biotech, Ansan, Korea), and OneShape (MicroMega, Besançon, France). The tip size and taper for all files were #25 and 0.06. Experimental groups (n = 10/group) were assigned to 2-, 60-, 350-, and 600-rpm groups by the rotational speed of spindle...
January 16, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28104321/the-influence-of-various-irrigants-on-the-accuracy-of-2-electronic-apex-locators-in-locating-simulated-root-perforations
#2
Demet Altunbaş, Alper Kuştarcı, Mustafa Toyoğlu
INTRODUCTION: The aim of this study was to assess the accuracy of the Dentaport ZX (Morita Co, Kyoto, Japan) and the Rootor (Meta Biomed, Cheongwon-gun, Korea) electronic apex locators (EALs) in detecting root perforations in dry conditions and in the presence of the following irrigation solutions: 2.5% sodium hypochlorite (NaOCl), 0.9% saline solution (NaCl), and 17% EDTA. METHODS: Twenty extracted, single-rooted human teeth were perforated artificially in the middle section...
January 16, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28104320/torsional-performance-of-protaper-gold-rotary-instruments-during-shaping-of-small-root-canals-after-2-different-glide-path-preparations
#3
Ana Arias, Rafaela Andrade de Vasconcelos, Alexis Hernández, Ove A Peters
INTRODUCTION: The purpose of this study was to assess the ex vivo torsional performance of a novel rotary system in small root canals after 2 different glide path preparations. METHODS: Each independent canal of 8 mesial roots of mandibular molars was randomly assigned to achieve a reproducible glide path with a new set of either PathFile #1 (Dentsply Maillefer, Ballaigues, Switzerland) and #2 or ProGlider (Dentsply Maillefer) after negotiation with a 10 K-file...
January 16, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28041686/evaluation-of-a-commercially-available-hyaluronic-acid-hydrogel-restylane-as-injectable-scaffold-for-dental-pulp-regeneration-an-in%C3%A2-vitro-evaluation
#4
Vanessa Chrepa, Obadah Austah, Anibal Diogenes
INTRODUCTION: Regenerative endodontic procedures (REPs) are viable alternatives for treating immature teeth, yet these procedures do not predictably lead to pulp-dentin regeneration. A true bioengineering approach for dental pulp regeneration requires the incorporation of a scaffold conducive with the regeneration of the pulp-dentin complex. Several materials have been proposed as scaffolds for REPs; nonetheless, the majority are not eligible for immediate clinical chairside use. Thus, the aim of this study was to evaluate Restylane, a Food and Drug Administration-approved hyaluronic acid-based gel, as possible scaffold for REPs...
December 29, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28041685/treatment-outcomes-of-mineral-trioxide-aggregate-pulpotomy-in-vital-permanent-teeth-with-carious-pulp-exposure-the-retrospective-study
#5
Pairoj Linsuwanont, Kongthum Wimonsutthikul, Uht Pothimoke, Busayarat Santiwong
INTRODUCTION: This study aimed to illustrate the treatment outcomes of mineral trioxide aggregate (MTA) pulpotomy in vital permanent teeth with carious pulp exposure. METHODS: MTA pulpotomy was performed in 66 vital permanent teeth with carious pulp exposure including teeth with signs and symptoms of irreversible pulpitis and the presence of periapical radiolucency. Patients were assessed for clinical and radiographic outcomes by 2 examiners. The relationship between treatment outcomes and factors was analyzed by means of univariate analysis and binary logistic regression...
December 29, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28041684/ash1l-suppresses-matrix-metalloproteinase-through-mitogen-activated-protein-kinase-signaling-pathway-in-pulpitis
#6
Yin Bei, Hui Tianqian, Yu Fanyuan, Luo Haiyun, Liao Xueyang, Yang Jing, Wang Chenglin, Ye Ling
INTRODUCTION: Pulpitis is an inflammation of dental pulp produced by a response to external stimuli. The response entails substantial cellular and molecular activities. Both genetic and epigenetic regulators contribute to the occurrence of pulpitis. However, the epigenetic mechanisms are still poorly understood. In this research, we studied the role of the absent, small, or homeotic-like (ASH1L) gene in the process of pulpitis. METHODS: Human dental pulp cells (HDPCs) were stimulated with proinflammatory cytokine tumor necrosis factor alpha (TNF-α)...
December 29, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28041683/the-role-of-transient-receptor-potential-cation-channel-subfamily-c-member-1-in-the-odontoblastlike-differentiation-of-human-dental-pulp-cells
#7
Zhi Song, Lingling Chen, Jia Guo, Wei Qin, Runfu Wang, Shuheng Huang, Xiaoting Yang, Yaguang Tian, Zhengmei Lin
INTRODUCTION: Calcium ions (Ca(2+)) actively participate in reparative dentin formation by promoting cellular proliferation and differentiation of human dental pulp cells (hDPCs). Transient receptor potential cation channel, subfamily C, member 1 (TRPC1) activates Ca(2+) entry upon store depletion in a variety of cell types. However, the function of TRPC1 in hDPCs has not been reported. Therefore, we aimed to analyze the role of TRPC1 in hDPCs undergoing odontoblastlike differentiation...
December 29, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28041682/delayed-root-development-by-displaced-mineral-trioxide-aggregate-after-regenerative-endodontics-a-case-report
#8
Aovana Timmerman, Peter Parashos
INTRODUCTION: This case report presents the treatment of a 16-year-old boy with a maxillary lateral incisor (tooth #10) presenting with Oehlers type II dens invaginatus and diagnosed with previously initiated therapy and asymptomatic apical periodontitis. METHODS: A regenerative endodontic procedure (REP) was performed for the tooth but complicated by apically displaced mineral trioxide aggregate (MTA). Clinical and radiographic examination was undertaken yearly, and a cone-beam computed tomography scan was taken to investigate further the formation of hard tissues within the root canal...
December 29, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28027823/as-low-dose-as-sufficient-quality-optimization-of-cone-beam-computed-tomographic-scanning-protocol-for-tooth-autotransplantation-planning-and-follow-up-in-children
#9
Mostafa EzEldeen, Andreas Stratis, Wim Coucke, Marina Codari, Constantinus Politis, Reinhilde Jacobs
INTRODUCTION: Tooth autotransplantation (TAT) offers a viable biological approach to tooth replacement in children. To enhance the outcome predictability of the TAT procedure, a cone-beam computed tomographic (CBCT)-based surgical planning and transfer technique has been developed. The aim of this study was to optimize the CBCT scanning protocol to achieve a dose as low as possible and to maintain sufficient image quality. METHODS: A sectional head phantom (SK150; The Phantom Laboratory, Salem, NY) was scanned using 18 exposure protocols in 3 different CBCT machines: 3D Accuitomo 170 (Morita, Kyoto, Japan), ProMax 3D MAX (Planmeca, Helsinki, Finland), and NewTom VGI EVO (QR Verona, Verona, Italy)...
December 24, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28027822/semaphorin-4d-enhances-angiogenic-potential-and-suppresses-osteo-odontogenic-differentiation-of-human-dental-pulp-stem-cells
#10
Ting Zou, Waruna Lakmal Dissanayaka, Shan Jiang, Shuai Wang, Boon Chin Heng, Xiaojing Huang, Chengfei Zhang
INTRODUCTION: To investigate the roles of semaphorin 4D (Sema4D)/plexin-B1 signaling on the angiogenic potential and osteo-/odontogenic differentiation of human dental pulp stem cells (DPSCs) and to uncover the corresponding molecular mechanisms. METHODS: DPSCs were treated with Sema4D (10 μg/mL) for different time durations. Osteo-/odontogenic differentiation was assessed by quantifying alkaline phosphatase activity, mineralized nodule formation, and osteo-/odontogenic gene (ALP, Col1A1, BSP, RUNX2, and DSPP) and protein (Col1A1 and DSPP) expression...
December 24, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28027821/entrococcus-faecalis-elimination-in-root-canals-using-silver-nanoparticles-photodynamic-therapy-diode-laser-or-laser-activated-nanoparticles-an-in%C3%A2-vitro-study
#11
Farzaneh Afkhami, Saba Akbari, Nasim Chiniforush
INTRODUCTION: The aim of this study was to compare the efficacy of silver nanoparticles (AgNPs), an 810-nm diode laser (DL), conventional photodynamic therapy (PDT) with the use of indocyanine green (ICG) photosensitizer, and modified PDT with the use of AgNPs for the disinfection of root canals inoculated with Enterococcus faecalis. METHODS: The root canals of 65 extracted human single-rooted teeth were prepared, and E. faecalis was incubated in the root canals for 4 weeks...
December 24, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28024758/cone-beam-computed-tomography-uses-in-clinical-endodontics-observer-variability-in-detecting-periapical-lesions
#12
Jeffrey M Parker, André Mol, Eric M Rivera, Peter Z Tawil
INTRODUCTION: The accurate interpretation of a cone-beam computed tomographic (CBCT) volume is critical in identifying the presence of disease correctly and consistently. The aim of this clinical study was to determine the effect of experience level on the detection of periapical lesions in CBCT volumes. METHODS: CBCT volumes of 22 maxillary molars were interpreted by 3 endodontic faculty, 3 endodontic residents, and 3 dental students. These groups were compared with the consensus opinion of 2 experienced oral and maxillofacial radiologists...
December 23, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/28024757/expression-of-inflammatory-cytokines-and-chemokines-in-replanted-permanent-teeth-with-external-root-resorption
#13
Juliana Vilela Bastos, Tarcilia A Silva, Enrico A Colosimo, Maria Ilma S Côrtes, Daniela Augusta B Ferreira, Eugenio Marcos A Goulart, Ricardo S Gomez, Walderez O Dutra
INTRODUCTION: The progressive forms of inflammatory external root resorption (IERR) and replacement external root resorption (RERR) are serious complications and the main causes of tooth loss after replantation. This study aimed to investigate the expression pattern of inflammatory molecules in extracted human teeth presenting with external root resorption (ERR) after replantation. METHODS: Root fragments from 22 teeth showing IERR and 20 teeth with RERR were triturated using a homogenizer to extract inflammatory molecules...
December 23, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27989584/comparative-effectiveness-of-new-mechanical-irrigant-agitating-devices-for-debris-removal-from-the-canal-and-isthmus-of-mesial-roots-of-mandibular-molars
#14
Jussaro Alves Duque, Marco Antonio Hungaro Duarte, Lyz Cristina Furquim Canali, Rafaela Fernandes Zancan, Rodrigo Ricci Vivan, Ricardo Affonso Bernardes, Clovis Monteiro Bramante
INTRODUCTION: The aim of this study was to compare the effectiveness of Easy Clean (Easy Dental Equipment, Belo Horizonte, MG, Brazil) in continuous and reciprocating motion, passive ultrasonic irrigation (PUI), Endoactivator systems (Dentsply Maillefer, Ballaigues, Switzerland), and conventional irrigation for debris removal from root canals and isthmus. METHODS: Fifty mesial roots of mandibular molars were embedded in epoxy resin using a metal muffle; afterward, the blocks containing the roots were sectioned at 2, 4, and 6 mm from the apex...
December 15, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27989583/collaborative-management-of-combined-periodontal-endodontic-lesions-with-a-palatogingival-groove-a-case-series
#15
Young-Dan Cho, Jung-Eun Lee, Yoonjin Chung, Woo-Cheol Lee, Yang-Jo Seol, Yong-Moo Lee, In-Chul Rhyu, Young Ku
INTRODUCTION: This article reports 3 representative cases of interdisciplinary management of a palatogingival groove in maxillary lateral incisors. The development, pathology, and effectiveness of management approaches in cases involving a combined periodontal-endodontic lesion with a palatogingival groove are discussed. METHODS: We describe 3 patients with a noncontributory medical history presenting with a chief complaint related to a maxillary incisor and diagnosed with a combined periodontal-endodontic lesion with a palatogingival groove at Seoul National University Dental Hospital, Seoul, Korea...
December 15, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27989582/expression-of-cannabinoid-type-1-receptors-in%C3%A2-human-odontoblast-cells
#16
Kehua Que, Dan He, Ying Jin, Ligeng Wu, Fang Wang, Zhiying Zhao, Jing Yang, Jiayin Deng
INTRODUCTION: The aim of this study was to investigate the functional expression of cannabinoid type 1 (CB1) receptors in human odontoblasts (HODs) and the possible internal mechanism. METHODS: In the present study, we examined the molecular and functional expression of the CB1 receptors in cultured HOD-like cells and native HODs obtained from healthy wisdom teeth. RESULTS: Immunohistochemistry and immunofluorescence revealed that CB1 receptors localize to native HODs and HOD-like cells, respectively...
December 15, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27989581/influence-of-temperature-on-cyclic-fatigue-resistance-of-protaper-gold-and-protaper-universal-rotary-files
#17
Gianluca Plotino, Nicola M Grande, Montse Mercadé, Luca Testarelli, Gianluca Gambarini
INTRODUCTION: The aim of this study was to evaluate the cyclic fatigue resistance of ProTaper Universal (PTU; Dentsply Maillefer, Baillagues, Switzerland) and ProTaper Gold (PTG, Dentsply Maillefer) nickel-titanium rotary files at room and intracanal temperatures. METHODS: A total of 120 files were used to test the cyclic fatigue resistance of PTU (S1 and F2) and PTG (S1 and F2) in an artificial canal at room temperature (20°C) and at intracanal temperature (35°C)...
December 15, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27955921/clinical-and-radiographic-outcomes-in-immature-permanent-necrotic-evaginated-teeth-treated-with-regenerative-endodontic-procedures
#18
Ling Li, Yihuai Pan, Liqin Mei, Jun Li
INTRODUCTION: Regenerative endodontics is a promising alternative treatment for immature permanent teeth with necrotic dental pulp. The present study assessed the time to resolution of clinical symptoms and radiographic changes in root dimensions in immature permanent necrotic teeth with dens evaginatus. METHODS: In this prospective study, clinical and radiographic data were collected for 20 teeth with dens evaginatus treated with a revascularization protocol for 1 year...
December 9, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27939826/in%C3%A2-vitro-efficacy-of-xp-endo-finisher-with-2-different-protocols-on-biofilm-removal-from-apical-root-canals
#19
Pingping Bao, Ya Shen, James Lin, Markus Haapasalo
INTRODUCTION: The purpose of this study was to evaluate the effectiveness of the XP-endo Finisher (XPF; FKG Dentaire SA, La Chaux-de-Fonds, Switzerland) in biofilm removal in comparison with conventional needle irrigation (CNI) and passive ultrasonic irrigation (PUI) using an infected tooth model with an artificial apical groove. METHODS: Fifty-four extracted human single-rooted premolars were selected. Each tooth was split longitudinally into 2 halves, with a groove made in the apical segment of the canal wall...
December 7, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27939825/long-term-clinical-outcomes-of-endodontically-treated-teeth-restored-with-or-without-fiber-post-retained-single-unit-restorations
#20
Kevin A Guldener, Carla L Lanzrein, Beatrice E Siegrist Guldener, Niklaus P Lang, Christoph A Ramseier, Giovanni E Salvi
INTRODUCTION: The aim of the present study was to evaluate both survival and failure rates of endodontically treated teeth restored with or without fiber post-retained restorations after a mean observation period of at least 5 years. METHODS: A total of 144 single-rooted and multirooted teeth in 100 subjects were endodontically treated following a predetermined aseptic protocol and restored with either a fiber post and a composite core or a composite filling without intraradicular retention...
December 7, 2016: Journal of Endodontics
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