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Root canal system

Robyn Melanie Benz, Dorothee Harder, Felix Amsler, Johannes Voigt, Andreas Fieselmann, Anna Lucja Falkowski, Bram Stieltjes, Anna Hirschmann
OBJECTIVES: The aims of this study were to assess feasibility, image quality, and radiation dose and to estimate the optimal dose protocol for the lumbar spine of cadaveric specimens with different body mass indices (BMIs) in the upright position using a prototype 3-dimensional cone-beam computed tomography (CT) software implemented on a robotic x-ray system and compare with CT. MATERIALS AND METHODS: The lumbar spine of 5 formalin-fixed human cadaveric specimens (BMI, 22-35 kg/m) was prospectively assessed in the upright position using prototype software for 3-dimensional tomography implemented on a robotic x-ray system...
July 12, 2018: Investigative Radiology
Islam A Abdelaziz Ali, Prasanna Neelakantan
Light activated disinfection (LAD) is a strategy for optimizing root canal disinfection by using a highly-selective, targeted killing of bacteria using a combination of photosensitizers and light. Over the past decade, numerous in vitro and clinical studies have been performed to demonstrate the effectiveness of this mode of root canal disinfection. While most studies offer an important understanding of the effectiveness of LAD on monospecies biofilms, few have offered credence to the fact that infections of the root canal system are mediated by polymicrobial biofilms...
July 10, 2018: Dentistry journal
Yi-Han Li, Shi-Jie Bao, Xiang-Wen Yang, Xiao-Mei Tian, Bin Wei, Yuan-Li Zheng
OBJECTIVE: This study aimed to use cone-beam computed tomography (CBCT) to evaluate the root anatomy and canal morphology of maxillary premolars in a Chinese population and determine their degree of bilateral symmetry. DESIGN: 774 CBCT images were retrospectively analyzed, representing 1387 maxillary first premolars and 1403 second premolars. The number of roots and canals were recorded. The morphology of root canal systems was determined according to Vertucci's classification...
June 28, 2018: Archives of Oral Biology
Geoffrey St George, Alyn Morgan, John Meechan, David R Moles, Ian Needleman, Yuan-Ling Ng, Aviva Petrie
BACKGROUND: Pain during dental treatment, which is a common fear of patients, can be controlled successfully by local anaesthetic. Several different local anaesthetic formulations and techniques are available to dentists. OBJECTIVES: Our primary objectives were to compare the success of anaesthesia, the speed of onset and duration of anaesthesia, and systemic and local adverse effects amongst different local anaesthetic formulations for dental anaesthesia. We define success of anaesthesia as absence of pain during a dental procedure, or a negative response to electric pulp testing or other simulated scenario tests...
July 10, 2018: Cochrane Database of Systematic Reviews
B Üreyen Kaya, C E Erik, E Sesli Çetin, M Köle, M Maden
AIM: To evaluate the bacterial reduction achieved by the WaveOne Gold (Dentsply Sirona Endodontics, Ballaigues, Switzerland), Hyflex EDM (Coltene-Whaledent, Altstätten, Switzerland), and XP-endo Shaper (FKG Dentaire SA, La Chaux-de-Fonds, Switzerland) in canals infected with E. faecalis. The null hypothesis (H0 ) was that there would be no difference among the NiTi systems in reducing the root canal bacterial load. METHODOLOGY: Seventy four mandibular premolar teeth with straight and round root canals were selected...
July 9, 2018: International Endodontic Journal
H Caballero-Flores, C K Nabeshima, E Binotto, M E L Machado
AIM: To assess the fracture incidence of instruments from single-file reciprocating systems when used by students in an endodontic graduate programme. METHODOLOGY: Dental records and periapical radiographs of patients treated by students on an endodontic graduate programme using reciprocating systems were assessed. Information on tooth type, number of treated root canals, number of fractured instruments, fragment size, and angle, radius, arc length and position of root canal curvature where fractures occurred were tabulated for analysis...
July 9, 2018: International Endodontic Journal
I Bago, M Suk, M Katić, D Gabrić, I Anić
AIM: To compare the Reciproc Blue, Reciproc, and ProTaper Universal Retreatment systems with regard to the effective removal of epoxy resin-based sealer and gutta-percha during the retreatment of oval, straight root canals. METHODOLOGY: Forty-five extracted, human mandibular first premolars with single straight oval canals were selected on the basis of cone beam computed tomography evaluations. The root canals were instrumented with the ProTaper Next system up to the X2 file, and filled with gutta-percha and epoxy resin-based sealer using the cold lateral condensation technique...
July 9, 2018: International Endodontic Journal
P Betancourt, A Merlos, J M Sierra, O Camps-Font, J Arnabat-Dominguez, M Viñas
Bacteria living in biofilms exhibit altered growth phenotypes, while the biofilm provides benefits, the foremost of which is a certain protection against both immune system and killing effect by antimicrobials. Laser-activated irrigation (LAI) and passive ultrasonic irrigation (PUI) have been proposed as alternative methods for cleaning and disinfecting the root canal, as an adjuvant to conventional chemo-mechanical preparation in order to improve debridement and disinfection. Nevertheless, the potential antibacterial effect of LAI using 0...
July 6, 2018: Lasers in Medical Science
Raquel Esmeralda Guillén, Cleber Keiti Nabeshima, Hector Caballero-Flores, Miguel Roig Cayón, Montse Mercadé, Silvana Cai, Manoel Eduardo de Lima Machado
The aim of this study was to evaluate the WaveOne Gold and One Shape New Generation systems regarding the bacterial removal from root canals infected with Enterococcus faecalis by comparing them to the conventional WaveOne and One Shape systems. Forty-eight distobuccal root canals of maxillary molars sterilized with ethylene oxide were infected with E. faecalis for 21 days, and then root canal initial bacterial sample was collected with paper cones and plated on M-enterococcus agar. The specimens were randomly divided into 4 groups according to the instrumentation: WaveOne Gold, One Shape New Generation, WaveOne and One Shape...
May 2018: Brazilian Dental Journal
Ozgur Genc Sen, Burcu Bilgin, Sibel Koçak, Baran Can Sağlam, Mustafa Murat Koçak
The aim of this study was to compare the amount of apically extruded debris during root canal instrumentation using ProTaper Next (PTN), Twisted File (TF) Adaptive, and Reciproc instruments. Forty-five extracted human maxillary canines were selected and randomly assigned into 3 groups. The root canals were prepared using PTN instruments with continuous rotation (n=15), TF Adaptive instruments with adaptive motion (n=15), Reciproc instruments with reciprocating motion (n=15). During the preparations, canals were irrigated using distilled water and material extruded apically was collected in pre-weighed Eppendorf tubes...
May 2018: Brazilian Dental Journal
Sholeh Ghabraei, Mohammad Marvi, Behnam Bolhari, Parisa Bagheri
Objectives: Enterococcus faecalis (E. faecalis) is the most commonly isolated microorganism from teeth with postoperative infection. Triple antibiotic paste (TAP) has the ability to eradicate microorganisms from the root canal system when used as an intracanal medicament. The aim of this study was to determine the minimum duration of application of TAP required for elimination of E. faecalis from the root canal system and its minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) in an ex-vivo model...
January 2018: Journal of Dentistry of Tehran University of Medical Sciences
S Bürklein, J P Stüber, E Schäfer
AIM: To assess the real-time dynamic torque values and axial forces during preparation of straight root canals using three different endodontic motors and hand preparation. METHODOLOGY: Sixty maxillary incisors were divided into 4 homogeneous groups (n=15). After glide path establishment (size 20) the root canals were prepared to an apical size 40 using the rotary NiTi system F6 SkyTaper. Motors (DentaPort ZX OTR, EndoPilot and VDW.silver) were set to "auto-torque-reverse" mode and DentaPort ZX was set to its specific OTR mode (optimum torque reverse)...
July 3, 2018: International Endodontic Journal
Arun Kumar Patnana, Ankita Chugh
The curved and dilacerated roots in the posterior teeth often present the major challenge to the clinicians during the endodontic treatments. The efficient biomechanical preparation is also affected by improper instrumentation in the curved or the constricted canals. The use of conventional instruments and techniques in the dilacerated roots may develop ledges, fractured instruments, and canal blockages which further complicate the endodontic treatments. The introduction of ProTaper Universal rotary instruments has made a significant impact in the biomechanical preparation of root canals systems...
June 2018: Contemporary Clinical Dentistry
Svetlana Razumova, Anzhela Brago, Lamara Khaskhanova, Haydar Barakat, Ammar Howijieh
Background: The success of endodontic treatment depends on the knowledge of root canal system. The root canals have complex morphology and wide individual variations. The aim of this study was to evaluate the root canal morphology of the maxillary first molars among residents of the Moscow region using cone-beam computed tomography (CBCT) scanning. Materials and Methods: Three hundred CBCT images of patients aged 20-70 years old were analyzed to study the root canal system (the number of canals and the configuration according to Vertucci's classification) of the maxillary first molars...
June 2018: Contemporary Clinical Dentistry
Sonalkumari Vakilram Nishad, G B Shivamurthy
Aim: To compare the incidence of apical root crack formation after root canal preparation at different instrumentation lengths using ProTaper Universal (PTU), ProTaper Next (PTN) and ProTaper Gold (PTG) file systems. Subjects and Methods: Eighty-four mandibular first premolars with single and straight root canal were mounted in resin block after simulating periodontal ligaments. 1-2 mm of root apex was exposed followed by sectioning of 1 mm of root tip for better stereomicroscopic visualization...
June 2018: Contemporary Clinical Dentistry
Yuki Kojima, Mizuha Kojima, Kaori Nohara, Yutaka Sakaguchi
Parkinson's disease (PD) is a highly prevalent, long-term neurodegenerative disorder that is sometimes treated by deep brain stimulation (DBS), which significantly reduces the need for dopaminergic drug therapy and improves quality of life. Such patients are cautioned, however, that dental instruments such as a dental turbine or ultrasonic scaler may adversely affect the functioning of such a system. Here, we report dental treatment for right maxillary tooth pain in a 65-year-old woman undergoing DBS for PD...
2018: Bulletin of Tokyo Dental College
Duo Zhang, Ya Shen, César de la Fuente-Núñez, Markus Haapasalo
OBJECTIVES: The purpose of this in vitro study was by using quantitative real-time PCR and culturing to determine the effectiveness of two irrigation and cleaning systems in removing multispecies oral biofilms from root canals. MATERIAL AND METHODS: Twenty extracted human molars were instrumented to size #15/.02 and then cleaned with the GentleWave (GW) System. The teeth were autoclaved to provide the same sterile baseline. The molars were filled with mixed plaque suspended in BHI and centrifuged to inoculate the biofilms...
June 15, 2018: Clinical Oral Investigations
Wei-Qian Zhang, Xia Gong, Ping Xiong
PURPOSE: The present study was aimed to clinically evaluate transitional treatment of pulpitis during pregnancy. METHODS: Sixty pregnant women with pulpitis were divided into the first, second and third trimester. They were anesthetized locally using STA system combined with psychological intervention during treatment. The teeth were given one-appointment root canal preparation and filled with vitapex pasta. Normal obturation of the root canal was conducted after delivery...
February 2018: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
Shuang Fu, Yan Zhang, Wen-Bin Song
PURPOSE: The present study was aimed to clinically evaluate transitional treatment of pulpitis during pregnancy. METHODS: Sixty pregnant women with pulpitis were divided into the first, second and third trimester. They were anesthetized locally using STA system combined with psychological intervention during treatment. The teeth were given one-appointment root canal preparation and filled with vitapex pasta. Normal obturation of the root canal was conducted after delivery...
February 2018: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
Chu-Wen Sun, Yu Liu, Yi-Ming Yang, Qian Liao
PURPOSE: To observe root canal system of multi-canal mandibular first premolars and to analyze the morphology of them by micro-CT and three-dimensional reconstruction. METHODS: Thirty-two extracted mandibular first premolars with multiple root canals were selected and scanned by micro-CT. The number and morphology of canals, location of bifurcation and 5 subtle structures (lateral canals, apical ramification, isthmus, loops, apical delta) were analyzed. RESULTS: In the 32 specimens, 96...
February 2018: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
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