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Journal of Endodontics

Elen de Souza Tolentino, Pablo Andrés Amoroso-Silva, Murilo Priori Alcalde, Heitor Marques Honório, Lilian Cristina Vessoni Iwaki, Izabel Regina Fischer Rubira-Bullen, Marco Antônio Húngaro-Duarte
INTRODUCTION: The purpose of this study was to evaluate the accuracy of small-volume cone-beam computed tomography (CBCT) to detect and measure isthmi in the apical root canals of mandibular molars by using micro-computed tomography (μ-CT) as the reference standard. METHODS: Forty mandibular first molars selected on the basis of μ-CT scan and presenting isthmi in the apical 3-mm mesial roots were scanned by using the highest-resolution settings of a small-volume CBCT unit...
October 31, 2018: Journal of Endodontics
Davoud Jamshidi, Hamed Homayouni, Nima Moradi Majd, Samaneh Shahabi, Armita Arvin, Baharan Ranjbar Omidi
INTRODUCTION: Immature necrotic teeth are at a high risk of fracture, especially at the cervical region, after treatment. This study aimed to compare the impact and fracture strength of immature permanent teeth treated with revascularization versus a mineral trioxide aggregate (MTA) plug and fiber post. METHODS: This in vitro, experimental study was conducted on 160 maxillary central incisors, which were randomly divided into 10 groups. The groups included a fracture (F) and impact (I) negative control group, F and I positive control groups, F and I MTA groups, F and I revascularizing group, and F and I revascularized groups...
October 31, 2018: Journal of Endodontics
Elisabetta Cotti, Silvia Mezzena, Elia Schirru, Olimpia Ottonello, Michela Mura, Francesca Ideo, Marta Susnik, Paolo Usai
INTRODUCTION: We evaluated healing after nonsurgical primary/secondary endodontic treatment of apical periodontitis (AP) in patients with inflammatory bowel diseases (IBDs) treated with anti-tumor necrosis factor alpha biologic medications (BMs). METHODS: Nineteen patients with 22 teeth affected by AP from the gastroenterology unit of the hospital with IBDs under treatment with BMs formed the study group (the IBD group). Fourteen patients with 22 teeth with AP, matched by age and sex, without systemic diseases and not taking medications formed the control group...
October 31, 2018: Journal of Endodontics
Maamoun Ataya, Jung-Hong Ha, Sang Won Kwak, Ibrahim H Abu-Tahun, Rashid El Abed, Hyeon-Cheol Kim
INTRODUCTION: This study examined whether the use of T-Wire heat treatment enhanced the resistance to torsional force, cyclic fatigue, and bending stiffness of orifice preflaring nickel-titanium instruments. METHODS: Ninety heat-treated OneFlare (OFT; Micro-Mega, Besançon, France) and conventional OneFlare (OFC, Micro-Mega) nickel-titanium files of size #25/.09 with identical geometries were selected (n = 15 per group for each test). Torsional resistance was evaluated through the measurement of ultimate torsional strength, distortion angle, and toughness during rotational loading...
October 31, 2018: Journal of Endodontics
Seyed Mohsen Hasheminia, Alireza Farhad, Mahnaz Sheikhi, Parisa Soltani, Seyedeh Sareh Hendi, Masoumeh Ahmadi
INTRODUCTION: The purpose of this study was to compare canal transportation and the centering ability of Reciproc (VDW, Munich, Germany), WaveOne (Dentsply Maillefer, Ballaigues, Switzerland), and EdgeFile (EdgeEndo, Albuquerque, NM) rotary systems using cone-beam computed tomographic imaging. METHODS: Ninety mesiobuccal mandibular first molar uncalcified canals with at least a 19-mm length, a canal curvature of 15°-30° (the Schneider method), and a mature apex were selected...
October 31, 2018: Journal of Endodontics
Shinji Yoshii, Masataka Fujimoto, Masahiro Okuda, Chiaki Kitamura
INTRODUCTION: In straight root canals, intraradicular structures around the root canal orifice and apical foramen can be visualized with a dental operating microscope and commercially available root canal endoscopes. However, the root apex area, including the apical foramen, in a curved root canal cannot be visualized using these devices. In the present study, the potential of a newly developed root canal endoscope implementing an image fiber was examined in 3 types of root canal models and extracted teeth...
October 31, 2018: Journal of Endodontics
Lucila Piasecki, Paulo José Dos Reis, Eduardo Inocente Jussiani, Avacir Casanova Andrello
INTRODUCTION: This study evaluated the accuracy of 3 electronic apex locators (EALs) (CanalPro [Coltene-Endo, Cuyahoga Falls, OH], Apex ID [SybronEndo, Glendora, CA], and Root ZX Mini [J Morita, Tokyo, Japan]) in curved mesial canals of extracted mandibular molars using micro-computed tomographic (micro-CT) scanning. METHODS: The root canal length and the actual working length of 58 canals were measured using the visual method and 3-dimensional micro-CT reconstructions...
October 31, 2018: Journal of Endodontics
David Donnermeyer, Edgar Schäfer, Sebastian Bürklein
INTRODUCTION: The purpose of this study was to assess temperature development in endodontic sealers during different obturation techniques in a closed system simulating the surrounding biological structures at body temperature. METHODS: The root canals of 48 human single-rooted maxillary canines were instrumented with ProTaper Gold (Dentsply Sirona, York, PA) to size F3. On the buccal aspect of each root, artificial side canals with a diameter of 0.5 mm were drilled at a distance of 3, 6, and 9 mm from the apical foramen, and type K thermocouples were inserted via plastic pipes...
October 31, 2018: Journal of Endodontics
Sittichoke Osiri, Danuchit Banomyong, Vanthana Sattabanasuk, Kallaya Yanpiset
INTRODUCTION: A root canal obturated with a calcium silicate-based sealer (bioceramic sealer [BCS]) and a modified gutta-percha cone (bioceramic cone [BCC]) might improve the fracture resistance of the root. The objective of this study was to evaluate root reinforcement of a bioceramic cone/sealer (TotalFill; FKG Dentaire SA, La Chaux-de-Fonds, Switzerland) by investigating the fracture resistance, push-out bond strength, sealer penetration, and modulus of elasticity (MOE) in comparison with gutta-percha/AH Plus (Dentsply Maillefer, Tulsa, OK) (GP/AH)...
October 29, 2018: Journal of Endodontics
Eddie Hsiang-Hua Lai, Cheng-Ning Yang, Sze-Kwan Lin, Han-Wei Wang, Sang-Heng Kok, Chi-Yuan Hong, I-Hsuan Su, Hsiang Yang, Jenny Zwei-Chieng Chang
INTRODUCTION: Intramuscular injection of metformin has been shown to inhibit the progression of periapical lesions in rats by decreasing the number of receptor activator of nuclear factor-κβ ligand- and tartrate-resistant acid phosphatase-positive cells. In this study, we investigated the effect of metformin on hypoxia-induced apoptosis of osteoblasts and the therapeutic activity of intracanal metformin in induced periapical lesions in rats. METHODS: The influence of metformin on hypoxia-induced mitochondrial superoxide production in human osteoblasts was examined by using MitoSOX (Invitrogen, Carlsbad, CA) fluorescence dye signaling...
October 4, 2018: Journal of Endodontics
Lama Awawdeh, Aladdin Al-Qudah, Hanan Hamouri, Rosalie Jean Chakra
INTRODUCTION: Mineral trioxide aggregate (MTA) has been used in pulp capping of cariously exposed mature permanent teeth with promising results. The search for alternative materials that seal better and set faster than MTA and do not stain is ongoing. Biodentine (Septodont, St Maur-des-Fossés, France) exhibits these advantages but has not been tested yet for a prolonged duration in mature teeth. This study aimed to evaluate the clinical performance of Biodentine and white MTA (Angelus, Londrina, Brazil) in cariously exposed mature permanent teeth...
October 3, 2018: Journal of Endodontics
Carlos Estrela, Gabriela Soares Couto, Mike R Bueno, Kelvin G Bueno, Lucas R A Estrela, Olavo César Lyra Porto, Anibal Diogenes
INTRODUCTION: The purpose of this study was to determine the position of the apical foramen (AF) in relation to root surfaces of human permanent teeth using cone-beam computed tomographic (CBCT) imaging and novel advanced imaging analysis software (e-Vol DX; CDT Software, Bauru, SP, Brazil). METHODS: The AF position was determined on CBCT scans viewed and analyzed using e-Vol DX of 1400 teeth (422 patients) according to the root surface as follows: buccal, mesiobuccal, mesial, mesiolingual/palatal, lingual/palatal, distolingual/palatal, distal, distobuccal, and central...
September 25, 2018: Journal of Endodontics
Myrto Piperidou, Rana N S Sodhi, Kamil P Kolosowski, Bettina R Basrani
INTRODUCTION: SmearOFF (Vista Dental Products, Racine, WI) is an irrigation solution containing chlorhexidine (CHX), EDTA, and a surfactant. This study examined the chemical interaction of SmearOFF with sodium hypochlorite (NaOCl) on the dentin surface, specifically the formation of precipitate and/or parachloroanaline (PCA). METHODS: Dentin blocks prepared from human maxillary molars were mounted in resin. Dentinal tubules were exposed in a perpendicular orientation using an ultracryomicrotome...
September 25, 2018: Journal of Endodontics
Siavash Savadi Oskoee, Mahmoud Bahari, Mehdi Daneshpooy, Amir-Ahmad Ajami, Mahdi Rahbar
INTRODUCTION: Intraorifice barriers (IOBs) are usually used before internal bleaching for coronal sealing and the prevention of cervical resorption. The aim of this study was to investigate the effect of different IOBs on the fracture resistance (FR) of endodontically treated anterior teeth bleached with various bleaching agents (BAs). METHODS: After performing root canal treatment for 72 extracted bovine upper incisors, the coronal 3 mm of gutta-percha was removed, and samples were classified into 3 based on the type of IOB: calcium-enriched mixture, mineral trioxide aggregate, and resin-modified glass ionomer...
September 25, 2018: Journal of Endodontics
Dohyun Kim, Sunil Kim, Minju Song, Dae Ryong Kang, Meetu R Kohli, Euiseong Kim
INTRODUCTION: The purpose of this retrospective study was to evaluate and compare the outcome of endodontic micro-resurgery with that of primary endodontic microsurgery and determine prognostic factors affecting the outcome of micro-resurgery. METHODS: A clinical database was searched for endodontic microsurgery cases between 2001 and 2016. Nearest neighbor 2:1 propensity score matching for the following 5 variables was performed for cases of primary microsurgery and those of micro-resurgery: age, sex, tooth type, lesion type, and postoperative restoration...
September 19, 2018: Journal of Endodontics
Kent Urban, Julian Neuhaus, David Donnermeyer, Edgar Schäfer, Till Dammaschke
INTRODUCTION: The aim of this study was to compare the solubility and the change in pH of a tricalcium silicate-containing sealer (BioRoot RCS [BR]), a mineral trioxide aggregate-containing sealer (MTA Fillapex [MTA]), and an epoxy resin-based sealer (AH Plus [AH]) during a longer period of time. METHODS: The solubility test was carried out in accordance with ISO6876:2012. Three hundred eighty sealer samples (n = 10 per group) were stored for 6 months in double distilled water (AD) or phosphate-buffered saline (PBS)...
September 19, 2018: Journal of Endodontics
Adham A Azim, Howard H Wang, Mohamed Tarrosh, Katharina A Azim, Lucila Piasecki
INTRODUCTION: The aim of this study was to evaluate in vitro the performance of 3 single-file systems: WaveOne Gold Primary (WOG; Dentsply Sirona, Ballaigues, Switzerland), Hyflex EDM "one file" (EDM; Coltene/Whaledent, Alstatten, Switzerland), and XP Shaper (XP; FKG, La Chaux de Fonds, Switzerland), for nonsurgical endodontic retreatment on mandibular anterior teeth in regard to the amount of remaining filling material inside the canal, debris extrusion, and operation time...
September 19, 2018: Journal of Endodontics
Jorge N R Martins, Moataz-Bellah A M Alkhawas, Zaher Altaki, Gianmarco Bellardini, Luiza Berti, Carlos Boveda, Antonis Chaniotis, Daniel Flynn, Jose Antonio Gonzalez, Jojo Kottoor, Miguel Seruca Marques, Adam Monroe, Hani F Ounsi, Peter Parashos, Gianluca Plotino, Magnús F Ragnarsson, Ruben Rosas Aguilar, Fábio Santiago, Hussein C Seedat, Walter Vargas, Murilo von Zuben, Yuerong Zhang, Yongchun Gu, António Ginjeira
INTRODUCTION: Maxillary first molar second mesiobuccal (MB2) root canal prevalence may change among different populations. The aim of this study was to analyze the worldwide prevalence of the MB2 root canal and understand its possible relation with sex, age, side, and root configuration using in vivo cone-beam computed tomographic (CBCT) assessment. METHODS: Observers from 21 regions were calibrated to achieve a similar CBCT assessment methodology and instructed to collect data from 250 maxillary first molars in previously existing examinations...
September 19, 2018: Journal of Endodontics
Dan Wang, Ya Shen, Robert E W Hancock, Jingzhi Ma, Markus Haapasalo
INTRODUCTION: The present study aimed to evaluate the antibacterial effect of a new peptide, DJK-5, used alone or mixed together with EDTA on mono- and multispecies biofilms in dentin canals covered by a smear layer with or without preceding sodium hypochlorite (NaOCl) irrigation. METHODS: One hundred twelve dentin blocks (224 final specimens) were prepared and divided into 56 groups, and Enterococcus faecalis or multispecies bacteria were introduced into dentinal tubules by centrifugation...
September 19, 2018: Journal of Endodontics
José Espona, Elena Roig, Fernando Durán-Sindreu, Francesc Abella, Manoel Machado, Miguel Roig
According to the high number of articles published on invasive cervical resorption (ICR), this pathology, as commonly believed, is a more frequent form of cervical resorption. ICR is often misdiagnosed as internal resorption or caries, which leads to inappropriate treatment and even unnecessary tooth loss. Despite a correct diagnosis, the treatment of this type of hyperplastic invasive external resorption poses a challenge for the clinician. The Heithersay classification and the use of cone-beam computed tomographic imaging have increased our knowledge of the pathology and helped improve its prognosis...
September 19, 2018: Journal of Endodontics
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