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Journal of Endodontics

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https://www.readbyqxmd.com/read/28720286/stress-generation-during-pecking-motion-of-rotary-nickel-titanium-instruments-with-different-pecking-depth
#1
Jung-Hong Ha, Sang Won Kwak, Asgeir Sigurdsson, Seok Woo Chang, Sung Kyo Kim, Hyeon-Cheol Kim
INTRODUCTION: The aim of this study was to evaluate the effect of different pecking depth on the stress generated by the screw-in forces of a rotating endodontic file in simulated canals. METHODS: Twenty simulated resin blocks with a J-shaped curvature were used. Twenty OneG files (MicroMega, Besançon, France) were assigned for a screw-in test depending on the pecking depth in 2 groups (n = 10). The files were operated at 300 rpm, and the up and down speed was controlled at 1 mm/s stroke velocity and a 10-millisecond dwell time using a customized device...
July 15, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28716215/clinical-and-radiographic-assessment-of-the-efficacy-of-a-collagen-membrane-in-regenerative-endodontics-a-randomized-controlled-clinical%C3%A2-trial
#2
Xijun Jiang, He Liu, Chufang Peng
INTRODUCTION: Recent reviews confirm a general lack of randomized, controlled clinical studies on the efficacy of regenerative endodontics in immature teeth affected by pulp and periapical diseases. Moreover, we have no evidence of the curative efficacy of collagen membranes used as scaffolds in regenerative endodontics. Here, we evaluated whether a Bio-Gide collagen membrane (Geistlich Pharma AG, Wolhusen, Switzerland) has efficacy in promoting dentin formation in regenerative endodontics...
July 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712639/reduction-in-fracture-resistance-of-the-root-with%C3%A2-aging
#3
Weishi Yan, Carolina Montoya, Marit Øilo, Alex Ossa, Avina Paranjpe, Hai Zhang, Dwayne Arola
INTRODUCTION: The incidence of vertical root fracture in endodontically treated teeth increases with patient age. This study evaluated the microstructure, chemical composition, and mechanical properties of radicular dentin as a function of aging. METHODS: Single-rooted teeth were obtained from adult donors ranging from age 15 to older than 80 years. Beams were extracted from the middle third of the root and subjected to 4-point flexure to failure to evaluate strength of dentin in terms of donor age...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712638/canal-transportation-unprepared-areas-and-dentin-removal-after-preparation-with-bt-race-and-protaper-next-systems
#4
Sabrina C Brasil, Marília F Marceliano-Alves, Márcia L Marques, João P Grillo, Mariane F L S Lacerda, Flávio R F Alves, José F Siqueira, José C Provenzano
INTRODUCTION: This study compared the shaping ability of ProTaper Next (Dentsply Sirona, Tulsa, OK) and BT-RaCe (FKG Dentaire, La Chaux-de-Fonds, Switzerland) instrument systems in the mesial canals of mandibular molars using micro-computed tomographic (micro-CT) imaging. METHODS: A total of 17 type IV mesial roots of extracted first mandibular molars were scanned using micro-CT imaging before and after root canal preparation with the 2 instrument systems. Both systems were used in the same root but alternating the mesial canals from root to root...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712637/treatment-options-for-failing-regenerative-endodontic-procedures-report-of-3-cases
#5
Antonis Chaniotis
INTRODUCTION: Regenerative treatments in necrotic immature teeth are suggested as alternatives to conventional multiple or single-step apexification procedures. Although case reports and case series provide promising results, the treatment protocol is not yet fully established and regenerative procedure might fail. Once failure is encountered, the apexification treatment options still remain. METHODS: Repetition of the regenerative procedure after initial revitalization failure has not been suggested yet...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712636/human-exoproteome-in-acute-apical-abscesses
#6
Cristiane F Alfenas, Tiago A O Mendes, Humberto J O Ramos, Fernanda P Bruckner, Henrique S Antunes, Isabela N Rôças, José F Siqueira, José C Provenzano
INTRODUCTION: An acute apical abscess is a severe response of the host to massive invasion of the periapical tissues by bacteria from infected root canals. Although many studies have investigated the microbiota involved in the process, information on the host factors released during abscess formation is scarce. The purpose of this study was to describe the human exoproteome in samples from acute apical abscesses. METHODS: Fourteen pus samples were obtained by aspiration from patients with an acute apical abscess...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712635/efficacy-of-xp-endo-finisher-in-the-removal-of-triple-antibiotic-paste-from-immature-root-canals
#7
Dilek Turkaydin, Erhan Demir, Fatima Betul Basturk, Hesna Sazak Övecoglu
INTRODUCTION: The aim of this study was to evaluate and compare the effectiveness of the XP-Endo Finisher (FKG Dentaire, La Chaux-de-Fonds, Switzerland) with passive ultrasonic irrigation (PUI) and needle irrigation in the removal of triple antibiotic paste (TAP) from the straight immature root canals of extracted teeth. METHODS: Thirty-four freshly extracted single-rooted teeth were used. All canals were prepared up to the ProTaper F5 file (Dentsply Maillefer, Ballaigues, Switzerland)...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712634/management-of-dens-invaginatus-type-ii-associated-with-immature-apex-and-large-periradicular-lesion-using-platelet-rich-fibrin-and-biodentine
#8
Shruti Goel, Ruchika Roongta Nawal, Sangeeta Talwar
Dens invaginatus (DI) poses peculiar challenges in endodontic treatment of teeth because of distortion of pulpal space. A case of Oehlers type II DI with open apex and large periapical lesion is reported. The case was managed using cone-beam computed tomography (CBCT), operating microscope, platelet-rich fibrin (PRF), and Biodentine. A 15-year-old male patient presented with palatal swelling. Pulp sensibility testing of right maxillary lateral incisor was negative. Intraoral periapical digital radiograph revealed an Oehlers type II DI with open apex and periapical radiolucency...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712633/association-of-end-stage-renal-disease-with-radiographically-and-clinically-diagnosed-apical-periodontitis-a-hospital-based-study
#9
Navid Khalighinejad, Anita Aminoshariae, James C Kulild, Khalid Sahly, Andre Mickel
INTRODUCTION: The present study aimed to evaluate the prevalence of apical periodontitis (AP) and endodontic treatment in patients with end-stage renal disease (ESRD) as compared with patients with no history of ESRD. METHODS: In this cross-sectional study, 40 patients diagnosed with nondiabetic ESRD were included. The control group consisted of 40 age-matched and sex-matched healthy individuals. Digital panoramic radiographs were exposed on patients in both the experimental and control groups...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28712632/fracture-resistance-of-endodontically-treated-teeth-restored-with-2-different-fiber-reinforced-composite-and-2-conventional-composite-resin-core-buildup-materials-an-in%C3%A2-vitro-study
#10
Ashly Mary Eapen, L Vijay Amirtharaj, Kavitha Sanjeev, Sekar Mahalaxmi
INTRODUCTION: The purpose of this in vitro study was to comparatively evaluate the fracture resistance of endodontically treated teeth restored with 2 fiber-reinforced composite resins and 2 conventional composite resin core buildup materials. METHODS: Sixty noncarious unrestored human maxillary premolars were collected, endodontically treated (except group 1, negative control), and randomly divided into 5 groups (n = 10). Group 2 was the positive control. The remaining 40 prepared teeth were restored with various direct core buildup materials as follows: group 3 teeth were restored with dual-cure composite resin, group 4 with posterior composite resin, group 5 with fiber-reinforced composite resin, and group 6 with short fiber-reinforced composite resin...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28693895/determination-of-the-accuracy-of-5-electronic-apex-locators-in-the-function-of-different-employment-protocols
#11
Tiago Nepomuceno Oliveira, Nilton Vivacqua-Gomes, Ricardo Affonso Bernardes, Rodrigo Ricci Vivan, Marco Antonio Hungaro Duarte, Bruno Carvalho Vasconcelos
INTRODUCTION: The aim of this study was to evaluate the accuracy of 5 electronic apex locators (EALs): Root ZX II (RZX; J Morita, Tokyo, Japan), Raypex 6 (RAY; VDW GmbH, Munich, Germany), Apex ID (AID; SybronEndo, Orange, CA), Propex II (PRO; Dentsply Maillefer, Ballaigues, Switzerland), and Propex Pixi (PIXI, Dentsply Maillefer) when used in the following protocols: (1) -1.0, insertion up to 1.0 mm below the apical foramen (AF); (2) 0.0/-1.0, insertion until the AF and withdrawn 1.0 mm short of the AF; (3) 0...
July 7, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28689702/influence-of-cone-beam-computed-tomography-on-endodontic-retreatment-strategies-among-general-dental-practitioners-and-endodontists
#12
Gustavo Rodríguez, Shanon Patel, Fernando Durán-Sindreu, Miguel Roig, Francesc Abella
INTRODUCTION: Treatment options for endodontic failure include nonsurgical or surgical endodontic retreatment, intentional replantation, and extraction with or without replacement of the tooth. The aim of the present study was to determine the impact of cone-beam computed tomographic (CBCT) imaging on clinical decision making among general dental practitioners and endodontists after failed root canal treatment. A second objective was to assess the self-reported level of difficulty in making a treatment choice before and after viewing a preoperative CBCT scan...
July 7, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28689701/surface-changes-of-pathfile-after-glide-path-preparation-an-ex%C3%A2-vivo-and-in%C3%A2-vivo-study
#13
Yul Kim, Robert Love, Roy George
INTRODUCTION: The aim of this study was to evaluate the changes in the surface profile of rotary nickel-titanium (NiTi) files designed to prepare a glide path and conventional stainless steel (SS) hand files when used in extremely narrow canals both in clinical and experimental conditions. METHODS: This ex vivo/in vivo study used either SS #10 K hand files or the PathFile system (Dentsply Maillefer, Ballaigues, Switzerland) to establish a glide path in maxillary molars with narrow root canals (defined as canals that bound a #8 K-file at the working length)...
July 7, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28673496/optimization-of-tube-current-in-cone-beam-computed-tomography-for-the-detection-of-vertical-root-fractures-with-different-intracanal-materials
#14
Hugo Gaêta-Araujo, Gabriela Queiroz Silva de Souza, Deborah Queiroz Freitas, Christiano de Oliveira-Santos
INTRODUCTION: There is no consensus about the accuracy of cone-beam computed tomography (CBCT) for detecting vertical root fractures (VRFs), nor is there certainty about the isolated effect of different tube current parameters on the diagnosis of VRF through CBCT scans. This study aimed to evaluate how tube current affects the detection of VRF on CBCT examinations in the absence of intracanal materials and in the presence of gutta-percha (GP) and metal (MP) or fiberglass (FP) intracanal posts...
June 30, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28673495/proteomic-profiling-and-differential-messenger-rna-expression-correlate-hsp27-and-serpin-family-b-member-1-to-apical-periodontitis-outcomes
#15
Franco Cavalla, Claudia Biguetti, Sameer Jain, Cleverick Johnson, Ariadne Letra, Gustavo Pompermaier Garlet, Renato Menezes Silva
INTRODUCTION: Understanding protein expression profiles of apical periodontitis may contribute to the discovery of novel diagnostic or therapeutic molecular targets. METHODS: Periapical tissue samples (n = 5) of patients with lesions characterized as nonhealing were submitted for proteomic analysis. Two differentially expressed proteins (heat shock protein 27 [HSP27] and serpin family B member 1 [SERPINB1]) were selected for characterization, localization by immunofluorescence, and association with known biomarkers of acute inflammatory response in human apical periodontitis (n = 110) and healthy periodontal ligaments (n = 26)...
June 30, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28673494/partial-pulpotomy-in-mature-permanent-teeth-with-clinical-signs-indicative-of-irreversible-pulpitis-a-randomized-clinical-trial
#16
Nessrin A Taha, Mohammad A Khazali
INTRODUCTION: This study aimed to assess the outcome of partial pulpotomy using mineral trioxide aggregate (MTA) compared with calcium hydroxide (CH) in mature cariously exposed permanent molars. METHODS: Fifty permanent molar teeth with carious exposures in 50 patients >20 years old were included. Preoperative pulpal and periapical diagnosis was established based on a history of presenting pain, results of cold testing, and radiographic findings. After informed consent, the tooth was anesthetized, isolated via a dental dam, and disinfected with 5% sodium hypochlorite before caries excavation...
June 30, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28673493/variations-of-palatal-canal-morphology-in-maxillary-molars-a-case-series-and-literature-review
#17
Ali Nosrat, Prashant Verma, M Lamar Hicks, S Craig Schneider, Ali Behnia, Adham A Azim
A series of challenging cases with unusual canal anatomy in the palatal roots of maxillary first and second molars is presented. A review of the literature was done to elucidate the prevalence of anatomic variations in the palatal canal of maxillary first and second molars. An uncertain or indefinite radiographic appearance of the palatal canal, or eccentric deviation of the master cone or previous root canal filling was considered an indication of a bifurcated palatal canal. Five maxillary molars with a bifurcated palatal canal were identified...
June 30, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28673492/further-treatments-of-root-filled-teeth-in-the-swedish-adult-population-a-comparison-of-teeth-restored-with-direct-and-indirect-coronal-restorations
#18
Victoria S Dawson, Per-Erik Isberg, Thomas Kvist, Helena Fransson
INTRODUCTION: The aim of this study was to evaluate the frequencies of nonsurgical retreatment, root-end surgery, extraction, and further restoration of root-filled teeth in Sweden in 2009 during a follow-up period of 5 years and to compare the outcomes in teeth restored with direct or indirect restorations. METHODS: Data from the Swedish Social Insurance Agency were analyzed, and the frequencies of nonsurgical retreatment, root-end surgery, extractions, and further restoration were calculated for all teeth registered as root filled during 2009...
June 30, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28673491/assessment-of-volumetric-distortion-artifact-in-filled-root-canals-using-different-cone-beam-computed-tomographic-devices
#19
Berkan Celikten, Reinhilde Jacobs, Karla deFaria Vasconcelos, Yan Huang, Laura Ferreira Pinheiro Nicolielo, Kaan Orhan
INTRODUCTION: Artifacts in cone-beam computed tomographic (CBCT) imaging may compromise radiodiagnosis. Obturation materials for endodontic treatment may present with variable material density and thus also cause distinct artifact expression. The aim of this study was to assess the volume distortion artifact of root canal sealers using CBCT devices and micro-CT imaging as a reference. METHODS: Thirty single-root mandibular central incisors were used for this study...
June 30, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28673490/accuracy-of-cone-beam-computed-tomography-in-measuring-dentin-thickness-and-its-potential-of-predicting-the-remaining-dentin-thickness-after-removing-fractured-instruments
#20
Jialei Xu, Jingzhi He, Qian Yang, Dingming Huang, Xuedong Zhou, Ove A Peters, Yuan Gao
INTRODUCTION: The purpose of this study was to evaluate the accuracy of cone-beam computed tomographic (CBCT) to measure dentin thickness and its potential of predicting the remaining dentin thickness after the removal of fractured instrument fragments. METHODS: Twenty-three human mandibular molars were selected, and 4-mm portions of #25/.06 taper K3 files (SybronEndo, Orange, CA) were fractured in mesial canals. The teeth were then scanned using a micro-computed tomographic (micro-CT) system and a CBCT unit...
June 30, 2017: Journal of Endodontics
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