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Root canal system

Naimenur Seven, Sabri Cora
The aim of this study was to evaluate conventional syringe irrigation and three different irrigant activation techniques' effectiveness for smear layer removal in the absence and presence of intracanal-separated file (SF) fragment. Mandibular anterior teeth (160 total) with single canal were used and each root canal preparation was finished with the ProTaper Universal F1. The samples were randomly divided into eight equal groups with n = 20 in each group. The Protaper Universal F3 file was used to simulate intracanal file separation in four groups...
January 12, 2019: Microscopy Research and Technique
Cangül Keskin, Evren Sariyilmaz, Ali Keleş, Duygu H Güler
OBJECTIVE: The aim of this study is to evaluate the effect of intracanal cryotherapy on the fracture resistance of endodontically treated teeth. MATERIALS AND METHODS: Sixty single-rooted maxillary lateral incisor teeth with single root canals were selected and randomly divided into two groups (n = 30). The specimens were immersed in distilled water, which was heated to 37 °C during the procedures. The root canals were chemomechanically prepared up to the apical size of 50 and assigned to either the control group or the cryotherapy group...
January 9, 2019: Acta Odontologica Scandinavica
Jonathan Race, Peter Zilm, Jithendra Ratnayake, Tracy Fitzsimmons, Ceilidh Marchant, Peter Cathro
This study investigated the efficacy of Er,Cr:YSGG laser and ultrasonic activated irrigation on eradicating a mixed-species biofilm grown in root canals with complex anatomy. The biofilm was grown over 4-weeks in the root canals of decoronated human mandibular molar teeth. Control roots received no further treatment. The remaining roots were chemomechanically prepared using different irrigating protocols: 4% NaOCl and 15% EDTAC with ultrasonic activated irrigation and laser activated irrigation using power settings of 0...
January 8, 2019: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
José Burgos Ponce, Raquel Zanin Midena, Karen Henriette Pinke, Paulo Henrique Weckwerth, Flaviana Bombarda de Andrade, Vanessa Soares Lara
OBJECTIVE: Monocyte-derived macrophages (MDMs) ability to phagocytize and produce nitric oxide (NO) was tested against root-canal strains of Enterococcus faecalis submitted to alkaline stress. Root-canal strains were also compared with urine Enterococci. MATERIALS AND METHODS: Enterococcus faecalis were stressed with alkaline-BHI broth and incubated in vitro at a cell/bacteria ratio of 1:5. Phagocytosis was analyzed by fluorescence microscopy using acridine orange stain, and NO concentration was measured in supernatants...
January 8, 2019: Acta Odontologica Scandinavica
Lauren E Jensen, Sarah Murphy, Anne E Williamson, Fabricio B Teixeira, William T Johnson, Christopher C Friedl, Ove A Peters
A comparison of the preparation ability of two root canal instrumentation systems in oval-shaped canals using micro-computed tomography was undertaken. Thirty extracted, single-rooted, human mandibular premolars with radiographically similar canal morphology were selected, allocated to two groups (N = 15) and prepared with TRUShape or Vortex Blue (VB). Each sample was subjected to three scans (20 μm resolution): pre-preparation and after preparation to sizes #30 and #40. Three-dimensional data sets were evaluated for canal volume, surface area and surface treatment...
January 6, 2019: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
Krishna Prasad Shetty, S V Satish, Alexander M Luke, Abhishek Rajpal Badade, Krishna Rao Kilaru
Aim and Objectives: To evaluate the apical fill in relation to apical leakage using three different obturating techniques - Single Cone, Ultrafil 3D, and lateral condensation. Materials and Methods: Sixty-six mandibular single-rooted premolar teeth were selected and were randomly assigned into three different groups of obturating techniques. The canals were prepared using 0.4/25 HyFlex CM (Coltene Endo) rotary system file and obturated with corresponding HyFlex CM Single Cone, Ultrafil 3D injectable technique, and lateral condensation...
November 2018: Journal of International Society of Preventive & Community Dentistry
Yuan Gao, Yu Zhang, Xue-Dong Zhou, Ding-Ming Huang
The essence of pulp and periapical disease is bacterial infection. Thus, satisfactory infection control is the premise and foundation of healing, in which root canal preparation is a critical procedure. Root canal system anatomy, infection degree, physical cutting during root canal preparation, and certain cleaning measures affect the quality of infection control. Appropriate evaluation of the grades of infected root canals before treatment is necessary because different grades of root canal infection demand various disinfection schedules to facilitate tissue healing and guarantee the long-term success rate of endodontic treatment...
December 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
Yeliz Guven, Nilufer Ustun, Sermin D Aksakal, Nursen Topcuoglu, Oya Aktoren, Guven Kulekci
Context: Knowledge of the microbial composition of abscessed primary tooth is limited. Aim: The aim was to investigate the presence of 10 oral bacterial species in samples from abscessed primary tooth root canals using microarray technology and to determine their association with clinical findings. Subjects and Methods: The samples were collected from root canals of 20 primary molars with acute primer infection. The bacterial composition of the samples was semi-quantitatively defined using a microarray system (ParoCheck® )...
November 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Madhu Priya Manohar, Subash Sharma
Background: Removal of the microbial organisms from the root canal system is a prerequisite for the successful outcome of any root canal treatment. Use of an effective intracanal medicament will assist in the disinfection of the root canal system. Intracanal medicaments have been used to disinfect root canals between appointments and reduce interappointment pain. Materials and Methods: A questionnaire survey was conducted to evaluate the knowledge, attitude, and awareness about the principal choice of intracanal medicaments among general dental practitioners and nonendodontic specialists...
November 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Che-Wei Liao, Lih-Jyh Fuh, Yen-Wen Shen, Heng-Li Huang, Chih-Wei Kuo, Ming-Tzu Tsai, Jui-Ting Hsu
This study used available or purchased equipment and an image reconstruction system developed by the college of dentistry to establish a basic self-assembled micro-computed tomography (micro-CT) system. Such a system would be suitable for teaching dental radiology to dental students. Specifically, it could help students to understand the principles governing dental cone-beam computed tomography (CBCT) and provide graduate students with a system for scanning small samples (e.g., individual teeth) during the early stages of research...
2018: PloS One
Paulo Henrique Braz-Silva, Mariana Lobo Bergamini, Andressa Pinto Mardegan, Catharina Simioni De Rosa, Bengt Hasseus, Peter Jonasson
Apical periodontitis caused by root canal infection is the most frequent pathological lesion in the jaws, mainly manifested as periapical granulomas and cysts. Understanding of the formation and progression of apical periodontitis as well as the identification of inflammatory biomarkers can help increase the knowledge of pathogenic mechanisms, improve the diagnosis and provide support for different therapeutic strategies. The objective of the present article is to review inflammatory biomarkers such as cytokines, chemokines, inflammatory cells, neuropeptides, RANK/RANKL/OPG system and other inflammatory markers and to relate these systems to the development and progression of pathological conditions related to apical periodontitis...
December 26, 2018: Acta Odontologica Scandinavica
Gül Çelik, Murat Maden, Ahmet Savgat, Hikmet Orhan
Background: Since the introduction of nickel-titanium (Ni-Ti) instruments to dentistry, a wide variety of Ni-Ti instruments have become commercially available. These Ni-Ti instruments are expensive, which limits their usage in developing countries and forces practitioners to use instruments repeatedly. Another problem is the possible prion cross-contamination associated with the multiple usage of endodontic instruments. In addition, the use of these instruments requires new skills and experience...
2018: PeerJ
Himanshu Jain, Nidambur Vasudev Ballal
To evaluate the fill of internal resorption cavities obturated with thermoplasticized gutta-percha and GuttaFlow2 using CT scan. Twenty human maxillary anterior teeth were selected and root canals were prepared using ProTaper system to size F3. Irrigation was performed with 5 ml of 2.5% sodium hypochlorite (NaOCl) and 5 ml of 17% ethylenediaminetetraacetic acid (EDTA). Each root was then sectioned horizontally into two halves and semicircular cavities were prepared around the periphery of the root canal opening of each root half, using a round bur...
December 16, 2018: Microscopy Research and Technique
E J de Camargo, M A H Duarte, V A S Marques, M V R Só, J A Duque, M P Alcalde, R R Vivan
AIM: To evaluate the influence of three engine-driven NiTi file systems manufactured with different NiTi alloys for the preparation of second mesiobuccal (MB2) canals in extracted maxillary first molars using a micro-computed tomography scanner (Micro-CT). METHODOLOGY: Thirty maxillary molars with two canals in the mesiobuccal root were selected and randomly divided into 3 groups (n=10): Reciproc [REC; size 25, .08 taper; VDW, Munich, Germany], Prodesign R [PDR; size 25, ...
December 12, 2018: International Endodontic Journal
Aditi Jain, Asmita Singh Gupta, Rupika Agrawal
Aim: This study aimed to compare the canal-centering ability, apical transportation, and remaining dentin thickness (RDT) of OneShape and WaveOne (WO) systems using cone-beam computed tomography. Objective: The objective of this study was to evaluate the efficiency of two rotary systems in maintaining original root canal anatomy. Materials and Methods: Forty extracted human single-rooted mandibular premolars were used in the present study...
November 2018: Journal of Conservative Dentistry: JCD
Marília Fagury Marceliano-Alves, Carolina Oliveira de Lima, Carla Mendonça Augusto, Ana Flávia Almeida Barbosa, Adilia Maria Vieira Bruno, Aline Martins Rosa, Ricardo Tadeu Lopes
Context: The lack of thorough knowledge regarding morphological and anatomical variations of the root canal system can result in failure to identify all root canals and lead to inadequate instrumentation and consequent failure of the endodontic treatment. Aims: The aim of the study was to evaluate the anatomy of single-rooted mandibular canines using micro-computed tomography (micro-CT). Subjects and Methods: Eighty mandibular canines were scanned by micro-CT to determine anatomic parameters: Vertucci's classification, number of lateral canals, roundness, and minor and major diameters...
November 2018: Journal of Conservative Dentistry: JCD
Paulo Jorge Palma, Ana Messias, António Rosa Cerqueira, Luís Diogo Tavares, Francisco Caramelo, Luís Roseiro, João Miguel Santos
To evaluate the effect of immersion in 3% sodium hypochlorite solution in the resistance to cyclic fatigue of three nickel-titanium (NiTi) rotary file systems, ProTaper Next (PTN), Hyflex CM (CM), and Hyflex EDM (EDM), in a mechanical model featuring axial movement. Ninety instruments of three different NiTi rotary file systems, PTN (size 25, 0.06 taper), CM (25, 0.06), and EDM (25/~, variable taper), were randomly divided according to a 3 × 3 factorial design and tested under dynamic immersion in a 3% NaOCl solution (1 or 5 min) or without immersion, making a total of 9 groups (n = 10)...
December 12, 2018: Odontology
C Keskin, Ö Sivas Yilmaz, U Inan, Ö Özdemir
AIM: to compare the incidence, intensity and prediction of postoperative pain after glide path preparation with manual, continuous rotary and a novel reciprocating glide path instrument. METHODOLOGY: The study included 240 patients, which were treated by 4 specialists according to a planned treatment protocol. Following access cavity preparation and prior to glide path preparation, the subjects were randomly assigned to 1 of the 3 groups according to the glide path instrument by choosing a sealed envelope containing the group name: R-Pilot (VDW, Munich, Germany), ProGlider (Dentsply Sirona, Ballaigues, Switzerland) and stainless-steel K-files (Dentsply Sirona) (n = 80)...
December 8, 2018: International Endodontic Journal
Larissa Tais Soligo, Ediléia Lodi, Ana Paula Farina, Matheus Albino Souza, Cristina de Mattos Pimenta Vidal, Doglas Cecchin
The aim of this study was to compare the efficacy of grape seed extract (GSE), calcium hypochlorite [Ca(ClO)2], and sodium hypochlorite (NaOCl) irrigant solutions with rotary or reciprocating instrumentation for disinfection of root canals inoculated with Enterococcus faecalis. The mesiobuccal root canals of mandibular molars were prepared and inoculated with Enterococcus faecalis for 21 days. The roots were then randomly divided into the following eight experimental groups (n=11) according to the instrumentation technique and disinfection protocol: ProTaper Next or Reciproc R25 with sodium chloride (control group), 6% NaOCl, 6% Ca(ClO)2, or 50% GSE used for irrigation during instrumentation...
September 2018: Brazilian Dental Journal
(no author information available yet)
OBJECTIVEMiddle fossa surgery is challenging, and reliable surgical landmarks are essential to perform accurate and safe surgery. Although many descriptions of the middle fossa components have been published, a clinically practical description of this very complex anatomical region is lacking. Small structure arrangements in this area are often not well visualized or accurately demarcated with neuronavigation systems. The objective is to describe a "roadmap" of key surgical reference points and landmarks during middle fossa surgery to help the surgeon predict where critical structures will be located...
November 1, 2018: Journal of Neurosurgery
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