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Root canal system

Andreas Burkovski, Matthias Karl
OBJECTIVE: Root canal obturation still is a relevant research topic and patients spend substantial amounts of financial resources for this step of endodontic treatment. Three experiments were conducted challenging the necessity of root canal obturation. METHOD AND MATERIALS: Applying micro computed tomography, the volume of dentin tubules that cannot be instrumented during root canal therapy was determined. Using a simple biofilm model of human tooth segments, the effect of root canal obturation on the persistency of bacteria was evaluated and freshly extracted root canal treated teeth were examined for bacteria remaining in dentin...
November 8, 2018: Quintessence International
Raksha Bhat, Mithra N Hegde
Aims: The aim of the present study was to evaluate the efficacy of reverse rotary instrumentation in disinfection of the root canal at the apical third and qualitative confirmatory analysis using the scanning electron microscope (SEM). Subjects and Methods: Sixty single-rooted mandibular premolars were instrumented up to Protaper rotary file size F2 and contaminated with a known species of Enterococcus faecalis (ATCC 29212). The samples were then divided into three groups; Group 1: Experimental group-irrigation by agitation of 1% NaOCl with reverse rotary instrumentation; Group 2: Negative control-no irrigation; and Group 3 positive control-irrigation with 1% NaOCl using a 30-gauge needle...
September 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Ayfer Atav Ates, Aysin Dumani, Oguz Yoldas, Ilker Unal
OBJECTIVES: The aim of this study was to compare the postoperative pain after root canal treatment using a carrier-based obturation system and two different sealers. MATERIALS AND METHODS: In this prospective randomized clinical trial, 160 patients were selected. Patients with vital and devital teeth were randomized into four groups using a randomized block design with block sizes of 10 patients each. The groups were devital/vital teeth treated with iRoot SP sealer and devital/vital teeth treated with AH Plus sealer...
November 5, 2018: Clinical Oral Investigations
Michel Espinosa Klymus, Murilo Priori Alcalde, Rodrigo Ricci Vivan, Marcus Vinicius Reis Só, Bruno Carvalho de Vasconselos, Marco Antonio Hungaro Duarte
OBJECTIVES: The aim of this study was to evaluate the impact of body temperature on the cyclic fatigue resistance of different NiTi alloys used for the manufacturing of Reciproc Blue R25 (RB 25.08; VDW, Munich, Germany), X1 Blue File 25 (X1 25.06; MK Life Medical and Dental Products, Porto Alegre, Brazil) and WaveOne Gold Primary (WOG 25.07; Dentsply Maillefer, Ballaigues, Switzerland). MATERIALS AND METHODS: Sixty instruments of the RB 25.08, X1 25.06 and WOG 25...
November 5, 2018: Clinical Oral Investigations
Preena Sidhu, Swapnil Shankargouda, Avita Rath, Priyadarshini Hesarghatta Ramamurthy, Bennete Fernandes, Ashish Kumar Singh
Oral health influences general well-being and quality of life. Oral diseases can be debilitating and are a major heath concern worldwide. Medicinal plants have been used for thousands of years for treating human diseases. Considering the emergence of multi-drug resistant pathogens and financial difficulties in developing countries, there is an urgent need for developing new antimicrobial compounds which are safe, efficient and cost effective. Liquorice also known as yashtimadhu, sweetwood or mulhatti is one such herbal remedy which has shown to have immense potential in treatment of orofacial diseases...
October 31, 2018: Journal of Ayurveda and Integrative Medicine
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
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
Nidambur Vasudev Ballal, Himanshu Jain, Sheetal Rao, Alexander D Johnson, John Baeten, James F Wolcott
OBJECTIVES: To evaluate SmearOFF, 7% maleic acid (MA) and two different preparations of ethylenediaminetetraacetic acid (EDTA) in smear layer removal. MATERIALS AND METHODS: Fifty single-rooted teeth were separated into five groups, instrumented and irrigated as follows: (1) SmearOFF, (2) 7% MA, (3) 18% EDTA (pH 11.4), (4) 17% EDTA (pH 8.5) and (5) 0.9% saline. Teeth samples were blinded and examined by scanning electron microscopy with Image J software. RESULTS: Eighteen percent EDTA was less efficient when compared to SmearOFF and MA at all thirds of the root canal system...
November 2, 2018: Acta Odontologica Scandinavica
Jyothi Mandava, Rajiv-Kumar Yelisela, Sampath-Kumar Arikatla, Ravi-Chandra Ravi
Background: To evaluate the incidence of dentinal microcracks formation after root canal shaping procedures with HyFlex EDM and Vortex Blue rotary systems comparing with that of hand instrumentation using micro-computed tomography. Material and Methods: Mandibular first molar teeth (n=60) having 50 to 200mesial root curvature were scanned using high resolution micro-CT imaging before root canal preparation to identify the presence of dentinal defects. Post-instrumentation cross-sectional images were taken and increased number and type of root defects were assessed and recorded...
September 2018: Journal of Clinical and Experimental Dentistry
Daniel Cerny, Steven Eckert, Radek Mounajjed
PURPOSE: To evaluate survival rates of adhesive post-endodontic buildups made using composite resin and prefabricated quartz fiber posts. MATERIALS AND METHODS: This retrospective study included all buildups placed between January 1, 2008, and December 31, 2012, by a single skilled operator using a single-adhesive system and dual-curing cement. Final restorations included direct composites, various types of crowns, and fixed partial dentures. During recall, teeth were inspected by four different dentists, and survival analysis was performed using Kaplan-Meier test...
October 29, 2018: International Journal of Prosthodontics
Giulio Gavini, Marcelo Dos Santos, Celso Luis Caldeira, Manoel Eduardo de Lima Machado, Laila Gonzales Freire, Elaine Faga Iglecias, Ove Andrea Peters, George Táccio de Miranda Candeiro
The introduction of automated instrumentation in endodontics represented a major advance in progress for this specialty, with improvements in the quality and predictability of root canal preparation and a significant reduction in procedural errors. In recent years, endodontic instruments have undergone a series of changes brought about by modifications in design, surface treatments, and thermal treatments. In addition, new movements have also been incorporated to offer greater safety and efficiency, optimizing the properties of the NiTi alloy, especially through eccentric rotary motion...
October 18, 2018: Brazilian Oral Research
Manoel Damião de Sousa-Neto, Yara Correa Silva-Sousa, Jardel Francisco Mazzi-Chaves, Kleber Kildare Teodoro Carvalho, Ana Flávia Simões Barbosa, Marco Aurélio Versiani, Reinhilde Jacobs, Graziela Bianchi Leoni
This literature review has critically analyzed the published research related to the biomechanical preparation of root canals with three-dimensional analysis using micro-computed tomography (micro-CT). In December 2017, six databases (PubMed, Cochrane, Web of Science, Embase, Scopus, and Science Direct) were accessed using keywords to find articles including the use of the micro-CT analysis in biomechanical root canal preparation. There were 60 full articles that were selected, which were screened and read by two authors...
October 18, 2018: Brazilian Oral Research
José Freitas Siqueira Junior, Isabela das Neves Rôças, Marília Fagury Marceliano-Alves, Alejandro Ron Pérez, Domenico Ricucci
Chemomechanical preparation is intended to clean, disinfect, and shape the root canal. This step is of utmost importance during treatment of infected teeth with apical periodontitis, because treatment outcome depends on how effectively the clinician eliminates bacteria, their products, and necrotic tissue that would serve as substrate for bacterial regrowth. Nonetheless, curvatures and complex internal anatomical variations of the root canal system can pose a high degree of difficulty in reaching these goals...
October 18, 2018: Brazilian Oral Research
Svetlana Razumova, Anzhela Brago, Lamara Khaskhanova, Ammar Howijieh, Haydar Barakat, Ashot Manvelyan
Background: Successful endodontic treatment requires a significant knowledge of root canal anatomy. The aim of this study was to evaluate the root and root canal number of permanent teeth among the Moscow population using cone-beam computed tomography (CBCT) scanning. Materials and methods: 300 CBCT images of subjects were analyzed to study the anatomy of roots and root canal system of each tooth. The collected data were analyzed using IBM SPSS statistics software 22...
2018: International Journal of Dentistry
Yagiz Ozbay, Ali Erdemir
To evaluate which laser system is more effective on smear layer removal when distilled water or combination of sodium hypochlorite (NaOCl) and ethylenediaminetetraacetic acid (EDTA) are used as irrigants. Ninety-six human mandibular premolar teeth were used. Standard access cavities were prepared and the root canals were enlarged using ProTaper system to size F4 and divided into two equal groups according to final irrigation solution. In Group 1, distilled water was used, whilst 2.5% NaOCI and 17% EDTA solutions were used in Group 2...
October 23, 2018: Microscopy Research and Technique
Rami M Galal, Nada Omar, Haidy Nabil, Yousra Aly
OBJECTIVE: The aim of this in vitro study was to assess the effect of obturation technique and cementation timings on the bonding of fibre-reinforced posts to the root canal walls. METHODS: Twenty extracted teeth were randomly allocated to two groups according to the obturation technique and cementation timing. Central incisors with single canals were used after being decoronated. Every extracted tooth of the {vertical compaction group} (VC) group (n = 10) had been obturated using the {E & Q plus obturation system} with posts cemented in the same day; The other (CO) conventional group (n = 10) teeth were obturated using the conventional lateral compaction technique and posts cemented after one week...
September 25, 2018: Open Access Macedonian Journal of Medical Sciences
Martina Batinić, Mia Ročana, Ana Budimir, Ivica Anić, Ivona Bago
BACKGROUND: The aim of the study was to compare the efficacy of antimicrobial photodynamic therapy (aPDT) with irrigation protocols that include sodium hypochlorite (NaOCl), ethylenediaminotetraacetic acid (EDTA) or QMiX (combined irrigant: EDTA, chlorhexidine, detergent) solution after single-file reciprocating root canal instrumentation. METHODS: The study sample included 68 extracted mandibular human single canal teeth. The canals were inoculated with bacterial suspension made of wild strain of Enterococcus faecalis...
October 8, 2018: Photodiagnosis and Photodynamic Therapy
Eva Wolf, Mille Dragicevic, Märta Fuhrmann
OBJECTIVE: To compare the outcomes of two emergency treatment procedures to alleviate pain from localised symptomatic apical periodontitis: complete chemo-mechanical disinfection (CMD) of the root canal system, or removal of necrotic tissue from the pulp chamber (RNT), that is without instrumentation of the root canals. METHODS: Fifty-seven consecutive patients from the emergency clinic at Malmö University met the inclusion criteria: spontaneous pain and/or pain on percussion and palpation, non-bleeding pulp in the canal orifice, pain ≥4 on a Numeric Rating Scale and ≥18 years of age...
October 11, 2018: Journal of Oral Rehabilitation
Tarek-Fahed Alakabani, Vicente Faus-Llácer, Vicente Faus-Matoses
Background: When endodontic treatment fails, retreatment consists of the complete removal of the root canal filling material for thorough cleaning and reobturation. Various techniques are available for the filling removal procedure, which present varying degrees of efficacy, and take a varying length of time to perform. The aim of this study was to compare the time required to carry out reciprocating, rotary, and manual techniques with dental microscope and ultrasonic activation for removing filling material from root canals...
August 2018: Journal of Clinical and Experimental Dentistry
Guldane Magat, Selcuk Hakbilen
BACKGROUND: Permanent maxillary molar teeth have the most complex root and canal systems. This study aimed to determine the frequency and the localization of secondary mesiobuccal canal (MB2) in the mesiobuccal roots of permanent maxillary molars in a Turkish subpopulation using cone beam computed tomography (CBCT) and compare them by different age groups and gender. MATERIALS AND METHODS: In this retrospective study, a total of 800 maxillary molar teeth in 200 subjects were investigated...
October 9, 2018: Folia Morphologica (Warsz)
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