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Root canal system

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https://www.readbyqxmd.com/read/29777391/shaping-ability-of-reciprocating-single-file-systems-in-severely-curved-canals-waveone-and-reciproc-versus-waveone-gold-and-reciproc-blue
#1
Sebastian Bürklein, Stefanie Flüch, Edgar Schäfer
The aim was to compare the canal straightening of M-wire [Reciproc (VDW, Munich, Germany) and WaveOne (Dentsply Maillefer, Ballaigues, Switzerland)] and gold- and blue-wire heat-treated [Reciproc blue (VDW) and WaveOne Gold (Dentsply Maillefer)] instruments in severely curved root canals. A total of 80 root canals in extracted human teeth with angles of curvatures ranging between 25° and 35° and radii ranging between 3.1 and 8.5 mm were divided into four groups (n = 20). Based on radiographs taken prior to instrumentation, the groups were balanced with respect to the angle and the radius of canal curvature (P = 1...
May 18, 2018: Odontology
https://www.readbyqxmd.com/read/29774548/release-of-tgf-%C3%AE-1-into-root-canals-with-various-final-irrigants-in-regenerative-endodontics-an-in-vitro-analysis
#2
Y Chae, M Yang, J R Kim
AIM: To investigate the release of growth factors into the root canal space after various final irrigants during regenerative endodontic procedures. The residual cytotoxic effect of final irrigants on stem cells from the apical papilla (SCAP) was also examined. METHODOLOGY: To measure the release of TGF-β1, root segments (8mm long) were irrigated with 1.5% NaOCl followed by 20 mL of final irrigants; Saline, 17% EDTA, 10% citric acid, 10% or 37% phosphoric acid...
May 17, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29772080/substance-p-and-calcitonin-gene-related-peptide-expression-in-human-periodontal-ligament-after-root-canal-preparation-with-reciproc-blue-waveone-gold-xp-endoshaper-and-hand-files
#3
J Caviedes-Bucheli, N Rios-Osorio, M Rey-Rojas, F Laguna-Rivero, M M Azuero-Holguin, L E Diaz, H Curtidor, J J Castaneda-Ramirez, H R Munoz
AIM: To quantify the Substance P (SP) and Calcitonin gene-related peptide (CGRP) expression in healthy human periodontal ligament from premolars after root canal preparation with Reciproc Blue, WaveOne Gold, XP EndoShaper and hand files. METHODOLOGY: Fifty human periodontal ligament samples were obtained from healthy mandibular premolars where extraction was indicated for orthodontic reasons. Prior to extraction, 40 of these premolars were equally divided into four groups, and root canals were prepared using four different systems: Reciproc Blue, WaveOne Gold, XP EndoShaper, and a hand instrumentation technique...
May 17, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29765897/anatomical-analysis-of-the-resected-roots-of-mandibular-first-molars-after-failed-non-surgical-retreatment
#4
Jiyoung Yoon, Byeong-Hoon Cho, Jihyun Bae, Yonghoon Choi
Objectives: Understanding the reason for an unsuccessful non-surgical endodontic treatment outcome, as well as the complex anatomy of the root canal system, is very important. This study examined the cross-sectional root canal structure of mandibular first molars confirmed to have failed non-surgical root canal treatment using digital images obtained during intentional replantation surgery, as well as the causative factors of the failed conventional endodontic treatments. Materials and Methods: This study evaluated 115 mandibular first molars...
May 2018: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29763357/comparative-evaluation-of-endovac-and-conventional-irrigating-syringe-on-apical-extrusion-in-primary-molars-an-in-vitro-study
#5
Nilaya Reddy Venumbaka, Porselvi Baskaran, Jayanthi Mungara, Madhan Chenchugopal, Arun Elangovan, Poornima Vijayakumar
OBJECTIVES: The present study was undertaken to evaluate and compare the apical extrusion of irrigant and depth of irrigant penetration into dentine using the EndoVac irrigating system and manual irrigation system in primary molar teeth. STUDY DESIGN: Twenty five extracted primary molars satisfying the inclusion and exclusion criteria were divided into two groups with 29 roots in each group with an equal distribution of apical foramen area. The teeth were mounted in pre-weighed glass bottles and the canals were irrigated with 5...
May 15, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29756670/the-influence-of-post-system-design-and-material-on-the-biomechanical-behavior-of-teeth-with-little-remaining-coronal-structure
#6
Cristiano Lazzari Pinto, Claudia Lopes Brilhante Bhering, Gabriel Rodrigues de Oliveira, Angélica Maroli, Vagner Flávio Reginato, Ricardo Armini Caldas, Atais Bacchi
PURPOSE: To evaluate the influence of different post systems on the biomechanical behavior of teeth with a severe loss of remaining coronal structure. MATERIALS AND METHODS: Fifty standardized bovine teeth (n = 10 per group) were restored with: cast post-and-core (CPC), prefabricated metallic post (PFM), parallel glass-fiber post (P-FP), conical glass-fiber post (C-FP), or composite core (no post, CC). The survival rate during thermomechanical challenging (TC), the fracture strength (FS), and failure patterns (FP) were evaluated...
May 14, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29756274/niti-loss-on-the-dentinal-walls-and-instrument-deformation-during-root-canal-preparation
#7
Carolina Fabiana Centenaro, Fabiana Soares Grecca, Patrícia Maria Poli Kopper, Rodrigo Ricci Vivan, Jefferson Ricardo Pereira, Ricardo Abreu da Rosa, Paula Barcellos da Silva, Marcus Vinícius Reis Só
The purpose of this study was to quantify the presence of nickel (Ni) and titanium (Ti) on dentin walls of prepared root canals using Endosequence (ES) and Wave One (WO) systems, the deformation, and fracture of these instruments. Thirty extracted human premolar teeth were selected and prepared with WO, ES, and manually (control group-CG). Each instrument was used in four root canals. The root canals were irrigated with 2.5% sodium hypochlorite solution. After preparation, roots were sectioned longitudinally and the apical third was analyzed by scanning electron microscopy with X-ray microanalysis (SEM-EDS)...
May 13, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29754275/zinc-oxide-eugenol-paste-jeopardises-the-adhesive-bonding-to-primary-dentine
#8
C W Pires, T L Lenzi, F Z M Soares, R O Rocha
AIM: This was to evaluate the influence of root canal filling pastes on microshear bond strength (µSBS) of an adhesive system to primary dentine. METHODS: Human (32) primary molars were randomly assigned into four experimental groups (n = 8): zinc oxide eugenol paste (ZOE); iodoform paste (Guedes-Pinto paste); calcium hydroxide paste thickened with zinc oxide; and no filling paste (control). Flat dentine surfaces were covered with a 1 mm-thick layer of the pastes for 15 min at 37 °C...
May 12, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29752532/both-operator-and-heat-treatment-determine-the-centring-ability-of-reciproc%C3%A2-files-in-vitro
#9
N Hofmann
OBJECTIVES: To determine the shaping ability of reciprocating files without/with post-manufacturing heat treatment (Reciproc®/Reciproc blue®, VDW) when used by six operators of similar level of experience. MATERIALS AND METHODS: Plastic training blocs with curved root canals (5 mm radius, 55° angle) were mounted in a dental manikin. Each operator prepared six specimens with each instrument system using the file sizes R25, R40 and R50 consecutively. Specimens were photographed, and deviations from the centre of the canal were measured at intervals of 0...
May 12, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29750624/evaluation-of-the-effect-of-different-root-canal-preparation-techniques-in-primary-teeth-using-cbct
#10
Shahid M Shaikh, Mousumi Goswami
OBJECTIVES: The purpose of this in vitro study was to compare and evaluate the cleaning and shaping efficiency of the rotary Ni-Ti, sonic and conventional file systems for root canal preparation in primary teeth under CBCT. STUDY DESIGN: Seventy five maxillary and mandibular first and second primary molars were divided into three groups of 25 teeth each, according to the canal preparation technique: Group I Rotary file system, Group II Sonic file system, Group III Conventional K files...
May 11, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29746537/kinetic-and-kinematic-variables-affecting-trunk-flexion-during-level-walking-in-patients-with-lumbar-spinal-stenosis
#11
Tatsuya Igawa, Junji Katsuhira, Akira Hosaka, Kenta Uchikoshi, Shinichi Ishihara, Ko Matsudaira
Lumbar spinal stenosis causes cauda equina and nerve root compression, resulting in neurological symptoms. Although trunk flexion during level walking may alleviate these symptoms by enabling spinal canal decompression, some patients do not use this strategy. We aimed to identify the kinetic and kinematic variables that affect trunk flexion in patients during level walking. Gait was recorded in 111 patients using a three-dimensional motion capture system and six force plates. From the data recorded, walking velocity, bilateral step length, cycle time, maximum trunk flexion angle, forward pelvic tilt angle, pelvic rotation angle, maximum and minimum joint angles, and moment and power of the lower limb were calculated...
2018: PloS One
https://www.readbyqxmd.com/read/29732629/an-original-micro-ct-study-and-meta-analysis-of-the-internal-and-external-anatomy-of-maxillary-molars-implications-for-endodontic-treatment
#12
Iwona M Tomaszewska, Anna Jarzębska, Bendik Skinningsrud, Przemysław A Pękala, Sebastian Wroński, Joe Iwanaga
INTRODUCTION: The aim of this work was to conduct a radiological micro-CT study and meta-analysis to determine the morphological features of the root canal anatomy of the maxillary molars. MATERIALS AND METHODS: The radiological study included micro-CT scans of 110 maxillary first molars and 98 maxillary second molars. To identify articles eligible for inclusion in our meta-analysis, PubMed, Embase, and Web of Science were search comprehensively. The following data were extracted: study type (cadaveric, intraoperative or imaging), Vertucci types of canal configuration, presence/number of canals, roots, apical foramina, apical deltas, and inter-canal communications...
May 7, 2018: Clinical Anatomy
https://www.readbyqxmd.com/read/29729026/longevity-of-bond-strength-of-resin-cements-to-root-dentine-after-radiation-therapy
#13
P A Yamin, R D Pereira, F C Lopes, A M Queiroz, H F Oliveira, P C Saquy, M D Sousa-Neto
AIM: To evaluate the bond strength and adhesive interface between several resin cements and root dentine immediately and after 6 months of radiotherapy protocol. METHODOLOGY: Sixty maxillary canines were selected and randomly assigned to two groups (n=30): one group was not irradiated, and the other one was subjected to a cumulative radiation dose of 60 Gy. The teeth were sectioned to obtain roots with 16 mm length, and the canals were prepared with Reciproc system (R50) and filled using a lateral condensation technique with epoxy resin sealer...
May 4, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29717903/bactericidal-effect-of-various-laser-irradiation-systems-on-enterococcus-faecalis-biofilms-in-dentinal-tubules-a-confocal-laser-scanning-microscopy-study
#14
Xiaoli Wang, Xiaogang Cheng, Xin Liu, Zhihua Wang, Juan Wang, Cuihong Guo, Yaqing Zhang, Wenxi He
OBJECTIVE: The aim of this study was to compare the bactericidal effect of various laser irradiation systems on Enterococcus faecalis biofilms in dentinal tubules by using a novel dentin infection model and confocal laser scanning microscopy (CLSM). BACKGROUND DATA: Laser-activated irrigations have been proposed as an adjuvant to conventional protocols of root canal treatment to enhance the smear layer removal, which is a promising protocol for root canal disinfection...
May 2, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29707022/canal-transportation-and-centering-ability-of-protaper-and-safesider-in-preparation-of-curved-root-canals-a-cbct-evaluation
#15
Negar Delgoshayi, Mansoure Abbasi, Hengameh Bakhtiar, Shirin Sakhdari, Setareh Ghannad, Mohammad Reza Ellini
Introduction: Maintaining the original central canal path is an important parameter in efficient root canal preparation. Instruments causing minimal changes in original canal path are preferred for this purpose. This study sought to compare canal transportation and centering ability of ProTaper and SafeSider instruments in curved mesiobuccal root canals of mandibular first molars using cone beam computed tomography (CBCT). Methods and Materials: In this experimental study, 30 mesiobuccal root canals of extracted human mandibular first molars with 20° to 40° curvature were randomly divided into two groups ( n =15)...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29707019/micro-ct-evaluation-of-gutta-percha-removal-by-two-retreatment-systems
#16
Gustavo Alberto Rubino, George Táccio de Miranda Candeiro, Laila Gonzales Freire, Elaine Faga Iglecias, Érico de Mello Lemos, Celso Luiz Caldeira, Giulio Gavini
Introduction: The aim of the present ex vivo research was to compare the remaining filling material and the volumes of dentine removed after retreatment of curved canals with two rotary systems naming ProTaper Universal Retreatment and Mani NRT-GPR using micro-computed tomography (micro-CT). Methods and Material: Forty mandibular molars containing two completely separated canals, with curvature angle of 25-35° and a curvature radius <10 mm were prepared to the Mtwo instrument 35/0...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29707016/diagnostic-efficacy-of-four-methods-for-locating-the-second-mesiobuccal-canal-in-maxillary-molars
#17
Mariana De Carlo Bello, Camilla Tibúrcio-Machado, Clacir Dotto Londero, Fernando Branco Barletta, Carlos Heitor Cunha Moreira, Cláudia Medianeira Londero Pagliarin
Introduction: The major cause for failure of root canal therapy is the inability to recognize the presence of all canals of the root canal system. Auxiliary tools, such as magnifying loupe, operative microscope and computed tomography (CT) images are used to facilitate the location of canals. The objective of the present survey was to evaluate the diagnostic efficacy of four methods for detecting the second canal of mesiobuccal roots (MB2) of permanent maxillary molars. Methods and Material: A total of 147 extracted human maxillary molars were assessed...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29707012/accuracy-of-cone-beam-computed-tomography-in-comparison-with-standard-method-in-evaluating-root-canal-morphology-an-in-vitro-study
#18
Zahra Dalili Kajan, Mehran Taramsari, Negar Khosravi Fard, Mohsen Kanani
Introduction: In order to successfully perform root canal treatment, thorough knowledge of the root canal anatomy is essential. Cone-beam computed tomography (CBCT) has the ability to improve our understanding of the root canal system. The goal of the present study was to compare the accuracy of CBCT in revealing the number and form of the root canals of different maxillary and mandibular teeth with clearing and staining method. Methods and Materials: CBCT images were taken from 80 extracted human teeth fixed in agar arch models...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29707011/bacterial-reduction-after-gutta-percha-removal-with-single-vs-multiple-instrument-systems
#19
Felipe Xavier, Giselle Nevares, Luciana Gominho, Renata Rodrigues, Marcely Cassimiro, Kaline Romeiro, Diana Albuquerque
Introduction: The aim of this study was to evaluate the effectiveness of a reciprocating single-instrument system (Reciproc-REC) compared with combined continuously rotating multiple-instrument systems [D-Race (DR) and BioRace (BR)] in reducing Enterococcus faecalis (E.f.) after gutta-percha removal. Methods and Materials: Forty-six extracted human maxillary incisors were prepared and contaminated with E.f. strain (ATCC 29212) for 30 days. The samples were obturated and randomly divided into two experimental groups for gutta-percha removal ( n =23): a REC group (R50) and a DR/BR group (DR1, DR2 and BR6)...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29707009/the-effect-of-canal-preparation-with-four-different-rotary-systems-on-formation-of-dentinal-cracks-an-in-vitro-evaluation
#20
Elham Khoshbin, Zakiyeh Donyavi, Erfan Abbasi Atibeh, Ghodratollah Roshanaei, Faranak Amani
Introduction: Endodontic rotary systems may result in dentinal cracks. They may propagate to vertical root fracture that compromises the outcome of endodontic treatment. This study aimed to compare Neolix and Reciproc (single-file systems), Mtwo and ProTaper (conventional rotary systems) in terms of dentinal crack formation in root canal walls. Methods and Materials: This in vitro study was conducted on 110 extracted human single-rooted teeth. The teeth were randomly divided into four experimental groups ( n =25) for root canal preparation with Neolix, Reciproc, Mtwo and ProTaper systems and two control groups ( n =5)...
2018: Iranian Endodontic Journal
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