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Root canal system

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https://www.readbyqxmd.com/read/28430299/effect-of-retreatment-instruments-on-microcrack-formation-a-microcomputed-tomography-study
#1
Mustafa M Koçak, Neslihan Y Çırakoğlu, Sibel Koçak, Baran C Sağlam, Ersan Çiçek, Sevinç A Türker, Emre Bodrumlu
INTRODUCTION: The purpose of this study was to compare the occurrence of microcracks in teeth prepared with different retreatment systems using microcomputed tomography (micro-CT). METHODS: Forty-two freshly extracted mandibular premolar teeth were used. The root canals were instrumented with stainless steel K-files to an apical size of 35/.02 using the balanced-force technique and were obturated using the passive compaction technique. The specimens were divided into 3 experimental groups according to retreatment system used (n = 14): ProTaper Universal retreatment (PTUR), Mtwo retreatment (MTR), or D-RaCe retreatment (D-RC) systems...
April 4, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28426292/efficacy-of-three-different-lasers-on-eradication-of-enterococcus-faecalis-and-candida-albicans-biofilms-in-root-canal-system
#2
Silvija Kasić, Marita Knezović, Nataša Beader, Dragana Gabrić, Ana Ivanišević Malčić, Anja Baraba
OBJECTIVE: The objective was to compare the efficacy of three different lasers in disinfection of root canals inoculated with Enterococcus faecalis and Candida albicans biofilms. BACKGROUND: Endodontic space disinfection depends on the type of root canal irrigant used and the way it is delivered and agitated because irrigants have limited ability to reach all parts of root canal system. MATERIALS AND METHODS: Thirty single-rooted human teeth were selected...
April 20, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28424663/antimicrobial-photodynamic-therapy-against-endodontic-enterococcus-faecalis-and-candida-albicans-mono-and-mixed-biofilms-in-the-presence-of-photosensitizers-a-comparative-study-with-classical-endodontic-irrigants
#3
Patrícia Diogo, Chantal Fernandes, Francisco Caramelo, Marta Mota, Isabel M Miranda, M A F Faustino, M G P M S Neves, Marciana P Uliana, Kleber T de Oliveira, João M Santos, Teresa Gonçalves
Endodontic biofilms eradication from the infected root canal system remains as the primary focus in endodontic field. In this study, it was assessed the efficacy of antimicrobial Photodynamic Therapy (aPDT) with the Zn(II)chlorin e6 methyl ester (Zn(II)e6Me) activated by red light against monospecies and mixed biofilms of Enterococcus faecalis and Candida albicans. The results were compared with the ones obtained with Rose Bengal (RB), Toluidine Blue-O (TBO), the synthetic tetracationic porphyrin (TMPyP) as well as classical endodontic irrigants (3% NaOCl, 17% EDTA and 2% CHX)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28419470/excessive-heat-associated-gingival-necrosis-a-case-report
#4
Paul L Barnes, Giampiero Rossi-Fedele
Heat delivery devices have been associated with relatively high temperatures. Previous basic research studies suggest that the risk for periodontal tissues is negligible, as the presence of the root filling materials, amongst other factors, reduce the risk of overheating. This report describes the case of a 45-year old male, who was undergoing restorative treatment in a multi-specialty dental practice. As part of his overall treatment planning, orthograde root canal retreatment for his maxillary left incisor teeth was deemed necessary, due to chronic apical periodontitis...
April 17, 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28417452/worldwide-pattern-of-antibiotic-prescription-in-endodontic-infections
#5
REVIEW
Juan José Segura-Egea, Jenifer Martín-González, María Del Carmen Jiménez-Sánchez, Isabel Crespo-Gallardo, Juan José Saúco-Márquez, Eugenio Velasco-Ortega
BACKGROUND: Odontogenic infections, and especially endodontic infections, are polymicrobial, involving a combination of Gram-positive and Gram-negative facultative anaerobes and strictly anaerobic bacteria. Therefore, antibiotics can be used as an adjunct to endodontic treatment. However, most chronic and even acute endodontic infections can be successfully managed by disinfection of the root-canal system, which eliminates the source of infection, followed by abscess drainage or tooth extraction, without the need for antibiotics...
April 17, 2017: International Dental Journal
https://www.readbyqxmd.com/read/28416315/preparation-of-oval-shaped-canals-with-trushape-and-reciproc-systems-a-micro-computed-tomography-study-using-contralateral-premolars
#6
Ludmila S Guimarães, Cinthya C Gomes, Marília F Marceliano-Alves, Rodrigo S Cunha, José C Provenzano, José F Siqueira
INTRODUCTION: The purpose of this study was to compare the shaping properties of TRUShape and Reciproc systems during preparation of oval-shaped canals from contralateral teeth by using micro-computed tomography scanning. METHODS: Thirteen pairs of freshly extracted contralateral mandibular premolars with a single oval-shaped canal were selected and divided into 2 groups according to the root canal instrumentation technique, TRUShape and Reciproc. The final apical size of instrumentation was 40/...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416314/the-use-of-a-novel-approach-for-the-instrumentation-of-a-cone-beam-computed-tomography-discernible-lateral-canal-in-an-unusual-maxillary-incisor-case-report
#7
Antonis Chaniotis, Christos G Filippatos
Lateral and apical ramifications of the main root canal create potential pathways through which bacteria can spread and remain unaffected by treatment procedures. It is a challenge for the specialty to find techniques that can predictably reach, disinfect, and obturate these ramifications. Here, we report the use of a novel instrumentation approach to aid in the negotiation and management of a lateral canal discernible on cone-beam computed tomography (CBCT) in an unusual maxillary central incisor. A 23-year-old female patient was referred for evaluation and possible treatment of tooth 9...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416309/detection-of-apical-root-cracks-using-spectral-domain-and-swept-source-optical-coherence-tomography
#8
Bruna Paloma de Oliveira, Andréa Cruz Câmara, Daniel Amancio Duarte, Anderson Stevens Leonidas Gomes, Richard John Heck, Antonio Celso Dantas Antonino, Carlos Menezes Aguiar
INTRODUCTION: This study aimed to evaluate the ability of 2 optical coherence tomographic (OCT) systems to detect apical dentinal microcracks. METHODS: Twenty extracted human single-rooted mandibular incisors were selected. After root canal preparation with an R40 Reciproc file (VDW, Munich, Germany), the specimens presenting apical microcracks were identified using micro-computed tomographic (micro-CT) scanning as the gold standard. Then, the apical portions of the roots were imaged with spectral domain OCT (SD-OCT) and swept-source OCT systems, and the resulting images were blindly evaluated by 3 independent examiners to detect microcracks...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416307/the-efficacy-of-the-waveone-reciprocating-file-system-versus-the-protaper-retreatment-system-in-endodontic-retreatment-of-two-different-obturating-techniques
#9
Ben Jorgensen, Anne Williamson, Rene Chu, Fang Qian
INTRODUCTION: This ex vivo study aimed to evaluate the efficacy of retreating GuttaCore (Dentsply Tulsa Dental Specialties, Tulsa, OK) and warm vertically condensed gutta-percha in moderately curved canals with 2 different systems: ProTaper Universal Retreatment (Dentsply Tulsa Dental) and WaveOne (Dentsply Tulsa Dental). METHODS: Eighty mesial roots of mandibular molars were used in this study. The mesiobuccal canals in each sample were prepared to length with the WaveOne Primary file (Dentsply Tulsa Dental)...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416304/micro-computed-tomographic-analysis-of-apical-microcracks-before-and-after-root-canal-preparation-by-hand-rotary-and-reciprocating-instruments-at-different-working-lengths
#10
Bruna Paloma de Oliveira, Andréa Cruz Câmara, Daniel Amancio Duarte, Richard John Heck, Antonio Celso Dantas Antonino, Carlos Menezes Aguiar
INTRODUCTION: This study aimed to compare apical microcrack formation after root canal shaping by hand, rotary, and reciprocating files at different working lengths using micro-computed tomographic analysis. METHODS: Sixty mandibular incisors were randomly divided into 6 experimental groups (n = 10) according to the systems and working lengths used for the root canal preparation: ProTaper Universal for Hand Use (Dentsply Maillefer, Ballaigues, Switzerland), HyFlex CM (Coltene-Whaledent, Allstetten, Switzerland), and Reciproc (VDW, Munich, Germany) files working at the apical foramen (AF) and 1 mm short of the AF (AF - 1 mm)...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416302/effect-of-bacterial-biofilm-on-the-osteogenic-differentiation-of-stem-cells-of-apical-papilla
#11
Lakshmi Vishwanat, Rose Duong, Koyo Takimoto, Linda Phillips, Claudia O Espitia, Anibal Diogenes, Shivani B Ruparel, David Kolodrubetz, Nikita B Ruparel
INTRODUCTION: Although clinical success in regenerative endodontics is substantially high, histological success is limited to finding bone/cementum-like tissue instead of dentin within the canal space. The aims of this study were to investigate (1) the effect of bacterial biofilm on osteogenic gene expression in stem cells of the apical papilla (SCAP) and (2) the effect of bacterial antigens on the functional differentiation of SCAP into a mineralizing phenotype. METHODS: Using an ex vivo organotypic root canal model and an American Association of Endontists-recommended regenerative endodontic procedures, we evaluated SCAP differentiation in the presence and absence of an Enterococcus faecalis biofilm...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28394240/effect-of-laser-activated-irrigations-on-smear-layer-removal-from-the-root-canal-wall
#12
Xiaoli Wang, Xiaogang Cheng, Baogang Liu, Xin Liu, Qing Yu, Wenxi He
OBJECTIVE: The purpose of this study was to evaluate the effect of laser-activated irrigations (LAI) by using the Erbium: Yttrium Aluminum Garnet (Er:YAG) laser and the Erbium Chromium: Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) laser on removing smear layer (SL) from the root canal wall. BACKGROUND DATA: LAI has been proposed as an adjuvant to conventional protocols of endodontic treatment to enhance the disinfection, which is a promising protocol for SL removal...
April 5, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28393819/morphology-of-root-canal-surface-a-reflection-on-the-process-of-cementation-of-the-composite-relined-glass-fiber-post
#13
Yasmine Mendes Pupo, Elaine Casacqui, Paola Andressa Barbosa de Lima, Milton Domingos Michél, Albano Luis Novaes Bueno, André Luiz da Costa Michelotto
BACKGROUND: The present study was conducted to evaluate the bond strength in the different root thirds (premolars and maxillary central incisors) of composite relined glass fiber posts compared to untreated glass fiber posts cemented with dual- or chemical-cure cements. MATERIALS AND METHODS: Sixty human single-rooted premolars (flat canal) (n = 15) and 12 maxillary central incisors were used (round canal) (n = 3). The teeth were sectioned, and the roots received endodontic treatment...
January 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28390451/a-comparative-volumetric-evaluation-of-four-obturating-techniques-in-primary-teeth-using-cone-beam-computed-tomography
#14
Aparna Singh, Nidhi Gupta, Nidhi Agarwal, Dipanshu Kumar, Ashish Anand
PURPOSE: To compare the volume of root canals of primary teeth filled by four different obturating techniques: (1) lentulospiral (LS); (2) insulin syringe (IS); (3) endodontic pressure syringe (EPS); and (4) the NaviTip system (NS) using cone beam computed tomography (CBCT). METHODS: 76 root canals of primary posterior teeth were selected and divided into four groups, according to the obturation technique. Biomechanical preparation of each root canal was completed with a number 30 K-file, and the volumes of the canals were then measured using CBCT...
March 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28389648/root-anatomy-and-canal-morphology-of-mandibular-first-premolars-in-a-chinese-population
#15
Lei Dou, Duojiao Li, Tingting Xu, Yin Tang, Deqin Yang
This study was to investigate root anatomy and root canal morphology of mandibular first premolars in a Chinese population. 178 human permanent mandibular first premolars extracted from a native Chinese population were collected, scanned using micro-computed tomography and reconstructed three-dimensionally. The number of roots and canals, canal configuration and radicular grooves were investigated. The root canal morphology was categorized according to Vertucci's criteria. The radicular grooves were scored according to the Arizona State University dental anthropology scoring system (ASUDAS), and the correlation between scores for radicular grooves and root canal morphology was analyzed...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28389073/cone-beam-computed-tomographic-evaluation-and-endodontic-management-of-a-mandibular-first-premolar-with-type-ix-canal-configuration-case-report
#16
Aamina Zoya-Farook, Prashant Abhishek, Aditya Shahabadi
INTRODUCTION: Mandibular premolars exhibit considerable variations in their root canal system that can be particularly difficult to diagnose. Avoiding mishaps and successful nonsurgical endodontic therapy depends on an absolute understanding of the root and root canal morphology to locate, prepare, and obturate the canals. METHODS: This case report describes the endodontic therapy of a mandibular first premolar with 2 roots and 3 canals with confirmation of cone-beam computed tomography...
April 4, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28387992/influence-of-post-space-preparation-on-the-apical-leakage-of-calamus-single-cone-and-cold-lateral-condensation-obturation-techniques-a-computerized-fluid-filtration-study
#17
Zeynep Özkurt-Kayahan, Güher Barut, Zuhal Ulusoy, Hasan Oruçoğlu, Mehmet Baybora Kayahan, Ender Kazazoğlu, Faruk Haznedaroğlu
PURPOSE: Apical microleakage between the root canal and periapical tissues is considered a common cause of endodontic failure. The aim of this study was to evaluate the apical microleakage of various obturation techniques after immediate post space preparations with different drills. MATERIALS AND METHODS: One hundred twenty human single-rooted teeth were selected for this study. The coronal portions were removed to achieve a uniform length of 15 mm. All root canals were instrumented with ProTaper Next rotary files using crown-down technique...
April 7, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28383607/efectiveness-of-the-waveone-and-protaper-d-systems-for-removing-gutta-percha-with-or-without-a-solvent
#18
Ana Pm Colombo, Carlos E Fontana, Aline Godoy, Alexandre S De Martin, Augusto S Kato, Daniel Gp Rocha, Rina A Pelegrine, Carlos Es Bueno
Endodontic retreatment requires complete removal of the filling material and access to the apical foramen. The purpose of this study was to evaluate the effectiveness of the Wave One reciprocating system and compare it to the ProTaper D rotarysystem, with or without the use of a solvent, in removing filling material from root canals. The time required for each filling removal technique employed was also determined and compared. Forty extracted human mandibular premolars with a single, straight, flattened canal were prepared and filled...
December 2016: Acta Odontológica Latinoamericana: AOL
https://www.readbyqxmd.com/read/28383147/radiopaque-images-resembling-obturated-root-canals
#19
Calvin Y Shiroma
The practice of endodontics, while not as common as today, was performed during the WWII era. Some of the materials used to fill canals during this time period include gutta-percha, calcium hydroxide, gold foil, and silver points. In this case study, fissures and fractures were present on the exposed root surfaces of the dental remains. Radiographs of the dental remains revealed canal systems similar to those obturated with a paste or semi-solid material. The root surface defects appear to be the access point for the radiopaque material...
April 6, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28377652/a-comparative-evaluation-of-accuracy-of-new-generation-electronic-apex-locator-with-conventional-radiography-to-determine-working-length-in-primary-teeth-an-in-vivo-study
#20
K Vidya Bhat, Prakashchandra Shetty, Latha Anandakrishna
AIMS: The purpose of this study was to evaluate the accuracy of a new-generation electronic apex locator (iPex) to determine working length in primary teeth with or without root resorption as compared with the conventional radiographic method. MATERIALS AND METHODS: A sample of 30 primary posterior teeth which are indicated for pulpectomy were selected for the study. After obtaining the informed consent from the parents, local anesthesia was administered. Access cavity was prepared with no...
January 2017: International Journal of Clinical Pediatric Dentistry
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