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Root canal system

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https://www.readbyqxmd.com/read/28808472/successful-ultra-conservative-management-of-a-mandibular-premolar-with-dens-invaginatus
#1
Ramin Abazarpour, Masoud Parirokh, Aida Farhadi, Zahra Jalali, Nasir Kheirabadi
Dens invaginatus is one of the most common anomalies of tooth structure. It is caused by the invagination of the crown surface during odontogenesis that enters the pulp chamber of the affected tooth. Depending on the complexity of invagination, the tooth might present with pulp necrosis, open apex and a complicated root canal system. This case report presents an Oehlers' type 2 dens-invaginatus in a mandibular premolar with chronic apical abscess. In most cases, dens invaginatus is removed during treatment...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808459/evaluation-of-apically-extruded-debris-during-root-canal-retreatment-using-protaper-next-and-reciproc-in-severely-curved-canals
#2
Giselle Nevares, Kaline Romeiro, Diana Albuquerque, Felipe Xavier, Howard Fogel, Laila Freire, Rodrigo Cunha
INTRODUCTION: To compare the apical extrusion of debris produced during root obturating material removal from severely curved root canals using either Reciproc (REC) or ProTaper Next (PTN) systems. METHODS AND MATERIALS: Twenty-six mesial canals of lower molars were instrumented, filled and allocated into two groups (n=13). Micro-computed tomographic images were performed to determine the root canal configuration (Vertucci's type IV) and initial volume of obturation...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808458/effect-of-propylene-glycol-on-the-sealing-ability-of-mineral-trioxide-aggregate-and-calcium-enriched-mixture-cement-apical-barriers
#3
Alireza Adl, Fereshte Sobhnamayan, Nooshin Sadat Shojaee, Fateme Tahmasebi Azad, Mohsen Bahmani
INTRODUCTION: Propylene glycol (PG) improves the handling, physical, and chemical properties of mineral trioxide aggregate (MTA). This study aimed to evaluate the effect of PG on the sealing ability of MTA and calcium-enriched mixture (CEM) apical barriers. METHODS AND MATERIALS: A total of 70 extracted human maxillary single-rooted teeth were prepared using ProTaper rotary system. The apical 3 mm of the root tips were resected and the root canals were enlarged with Peeso reamers up to #4, to create open apex teeth...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808456/an-in-vitro-comparison-of-apically-extruded-debris-using-reciproc-protaper-universal-neolix-and-hyflex-in-curved-canals
#4
Hossein Labbaf, Kiumars Nazari Moghadam, Shahriar Shahab, Mahshid Mohammadi Bassir, Mohammad Amin Fahimi
INTRODUCTION: As a consequence of root canal preparation, dentinal chips, irrigants and pulp remnants are extruded into preradicular space. This phenomenon may lead to post endodontic flare-ups. The purpose of this study was to compare the amount of extruded debris with four endodontic NiTi engine-driven systems. METHODS AND MATERIALS: Sixty mesiobuccal roots of maxillary molars with 15-30˚ curvature were divided randomly into four groups (n=15). Each group was instrumented up to apical size of 25 using Reciproc, ProTaper Universal, Neolix and Hyflex...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808452/root-morphology-and-canal-configuration-of-first-and-second-maxillary-molars-in-a-selected-iranian-population-a-cone-beam-computed-tomography-evaluation
#5
Abbasali Khademi, Asieh Zamani Naser, Zahra Bahreinian, Mojdeh Mehdizadeh, Mojtaba Najarian, Saber Khazaei
INTRODUCTION: The aim of this investigation was to evaluate root canal morphology of maxillary first and second molars and also to assess the prevalence and morphology of the second mesiobuccal canal (MB2) in these teeth, using cone-beam computed tomography (CBCT). METHODS AND MATERIALS: In this cross-sectional study, the total of 470 CBCT images from the archive of Radiology Department of Isfahan University of Medical Sciences (IUMS), Iran, was evaluated and 295 images were selected...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28800075/biofilms-in-endodontics-current-status-and-future-directions
#6
REVIEW
Prasanna Neelakantan, Monica Romero, Jorge Vera, Umer Daood, Asad U Khan, Aixin Yan, Gary Shun Pan Cheung
Microbiota are found in highly organized and complex entities, known as biofilms, the characteristics of which are fundamentally different from microbes in planktonic suspensions. Root canal infections are biofilm mediated. The complexity and variability of the root canal system, together with the multi-species nature of biofilms, make disinfection of this system extremely challenging. Microbial persistence appears to be the most important factor for failure of root canal treatment and this could further have an impact on pain and quality of life...
August 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28782092/hard-tissue-debris-removal-from-the-mesial-root-canal-system-of-mandibular-molars-with-ultrasonically-and-laser-activated-irrigation-a-micro-computed-tomography-study
#7
J Verstraeten, W Jacquet, R J G De Moor, M A Meire
This study is to investigate the efficacy of different irrigant activation techniques on removal of accumulated hard tissue debris (AHTD) in mesial roots of human mandibular molars. Extracted human mandibular molars with an isthmus between the mesial root canals were selected based on micro-CT (μCT) scans. The mesial canals were instrumented to an apical diameter ISO30 using ProTaper rotary files. Teeth were randomly assigned to three irrigant activation groups (n = 10): ultrasonically activated irrigation (UAI) using a size 20 Irrisafe for 3 × 20 s, laser-activated irrigation (LAI) with an Er:YAG laser (2940 nm) and plain 300 μm fiber tip inside the canal (20 mJ, 20 Hz, 3 × 20 s), and laser-activated irrigation with identical parameters with a 400 μm photon-induced photoacoustic streaming (PIPS) tip held at the canal entrance...
August 7, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28764283/fabrication-and-appraisal-of-poly-lactic-co-glycolic-acid-moxifloxacin-nanoparticles-using-vitamin-e-tpgs-a-potential-intracanal-drug-delivery-agent
#8
Hardik Makkar, Gaurav Patri
INTRODUCTION: Nanotechnology is gaining momentum in the search for ideal biomaterials by dental researchers. The expansible nature of Endodontology deems exploration, learning and scrutinizing newer avenues which have the potential to be applied and investigated. The popularity of polymers as drug delivery vehicles has opened avenues for their application in the root canal system. This study utilized application of biodegradable polymers as potential drug delivery vehicles against Enterococcus faecalis, one of the main reasons for post treatment disease...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28761248/a-comparative-evaluation-of-the-effect-of-8-and-17-ethylenediaminetetraacetic-acid-exposure-for-1-min-and-10-min-on-the-fracture-resistance-of-endodontically-treated-roots-an-in-vitro-study
#9
Shreetha Bhandary, Sapna Kakamari, Raghu Srinivasan, Mahesh Martur Chandrappa, Farhat Nasreen, Pramod Junjanna
OBJECTIVE: The objective of this study was to evaluate the effect of 8% and 17% ethylenediaminetetraacetic acid (EDTA) exposure for 1 min and 10 min on the fracture resistance of endodontically treated roots. METHODOLOGY: Sixty human single-rooted teeth were decoronated and divided into six groups (n = 10). Canal preparation was carried out except in negative control group, using the ProTaper rotary file system. Final irrigation was performed using distilled water, 17% EDTA for 1 min and 10 min, 8% EDTA for 1 min and 10 min...
January 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28761246/efficacy-of-two-rotary-retreatment-systems-in-removing-gutta-percha-and-sealer-during-endodontic-retreatment-with-or-without-solvent-a-comparative-in-vitro-study
#10
Moushmi Chalakkarayil Bhagavaldas, Abhinav Diwan, S Kusumvalli, Shiraz Pasha, Madhuri Devale, Deepak Chowdary Chava
OBJECTIVES: The aim of this in vitro study was to compare the efficacy of two retreatment rotary systems in the removal of Gutta-percha (GP) and sealer from the root canal walls with or without solvent. MATERIALS AND METHODS: Forty-eight extracted human mandibular first premolars were prepared and obturated with GP and AH Plus sealer. Samples were then randomly divided into four groups. Group I was retreated with MtwoR rotary system without solvent, Group II was retreated with MtwoR rotary system with Endosolv R as the solvent, Group III with D-RaCe rotary system without solvent, and Group IV with D-RaCe rotary system and Endosolv R solvent...
January 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28760318/the-horizontal-inclination-angle-is-associated-with-the-risk-of-inferior-alveolar-nerve-injury-during-the-extraction-of-mandibular-third-molars
#11
S Ishii, S Abe, A Moro, N Yokomizo, Y Kobayashi
The extraction of mandibular third molars can lead to injury to the inferior alveolar nerve. Hence, it is important to assess the proximity of the root to the inferior alveolar canal before extraction. The classification system of Pell and Gregory and the Winter classification are commonly used to evaluate the positional relationship of the third molar based on radiographs. This retrospective study involving 105 mandibular third molars was performed to assess whether these systems reflect the proximity of the root to the canal (based on computed tomography images), and to identify risk factors for nerve injury...
July 29, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28757246/evaluation-of-mesenchymal-stem-cell-modulation-of-trigeminal-neuronal-responses-to-cold
#12
Michael A Eskander, Koyo Takimoto, Anibal Diogenes
Tissue engineering protocols, such as regenerative endodontic procedures (REPs), comprise biologically based procedures designed to restore normal physiologic function. For REPs, the goal is reconstitution of the pulp-dentin complex by delivering mesenchymal stem cells (MSCs), including the stem cells of the apical papilla (SCAP) into a root canal system. Many patients regain cold sensitivity after REPs, but the mechanism is not understood. We hypothesized that SCAP modulate nociceptive function through a paracrine mechanism that activates cold-sensitive ion channels in neurons...
July 27, 2017: Neuroscience
https://www.readbyqxmd.com/read/28756963/micro-computed-tomographic-evaluation-of-dentinal-microcrack-formation-after-using-new-heat-treated-nickel-titanium-systems
#13
H Melike Bayram, Emre Bayram, Mert Ocak, M Bora Uzuner, Ferhat Geneci, Hakan Hamdi Celik
INTRODUCTION: The aim of the present study was to evaluate the frequency of dentinal microcracks observed after root canal preparation with HyFlex CM (Coltène/Whaledent, Altstätten, Switzerland), HyFlex EDM (Coltène/Whaledent), Vortex Blue (Dentsply Tulsa Dental Specialties, Tulsa, OK), and TRUShape (Dentsply Tulsa Dental Specialties) systems using micro-computed tomographic (micro-CT) analysis. METHODS: Forty human mandibular incisors with 1 and straight root canals were randomly assigned to 4 experimental groups (n = 10) and 1 control group for root canal preparation: group 1, HyFlex CM; group 2, HyFlex EDM; group 3, Vortex Blue; and group 4, TRUShape...
July 27, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28756962/evaluation-of-different-techniques-for-filling-simulated-c-shaped-canals-of-3-dimensional-printed-resin-teeth
#14
Tuba Gok, Ismail Davut Capar, Ilgin Akcay, Ali Keles
INTRODUCTION: The purpose of this study was to compare the ability of different root canal filling methods on the C1 root canal anatomy using 3-dimensional (3D) printer technology. METHODS: Mandibular molars were scanned with cone-beam computed tomographic (CBCT) imaging. A mandibular molar tooth with a C1 root canal configuration was selected according to images obtained from CBCT technology. The root canals were shaped with ProTaper Universal rotary instruments (Dentsply Maillefer, Ballaigues, Switzerland) and hand files...
July 27, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28749846/three-dimensional-radiologic-study-on-index-measurement-of-endonasal-endoscopic-optic-nerve-decompression
#15
Yao Zhao, Haobo Duan, Jianming Liu, Kailiang Cheng, Yingying Han, Youqiong Li
OBJECTIVE: To provide the radiologic basis for the clinical application of endonasal endoscopic optic nerve decompression (EEOND). METHODS: CTA images were used to observe the optic canal (OC) and related structures of 60 patients (120 sides) with normal nasal, paranasal sinuses, OC, and other related structures. RESULTS: Optic canal could be classified as: the canal (10 sides, 8.33%), the semicanal (25 sides, 20.83%), the impression (49 sides, 40...
July 26, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28748298/comparison-of-sodium-hypochlorite-extrusion-by-five-irrigation-systems-using-an-artificial-root-socket-model-and-a-quantitative-chemical-method
#16
Adham A Azim, Hacer Aksel, M Margaret Jefferson, George T-J Huang
OBJECTIVES: This is to compare the volumes of irrigant apically extruded by five irrigation systems in an artificial socket model simulating clinical conditions. MATERIALS AND METHODS: Twenty extracted human single-rooted teeth were enlarged to size 40/04 and then embedded in silicone impression material. The root canal space was irrigated with nominal 3% sodium hypochlorite (NaOCl) using standard needle irrigation (SNI) with a 30-gauge notched needle, EndoActivator (EA), XP Endo Finisher (XP Endo), EndoVac (EV), and photon-induced photoacoustic streaming (PIPS)...
July 26, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28748049/effect-of-different-nickel-titanium-rotary-files-on-dentinal-crack-formation-during-retreatment-procedure
#17
Mehmet Çitak, Taha Özyürek
Background. The aim of this study was to compare the dentinal defects caused by Reciproc, TF Adaptive and ProTaper Next NiTi rotary file systems during the retreatment procedure. Methods. A total of 150 mandibular incisors with straight and single root canals were included in the present study. All the root canals were prepared up to an apical diameter 0.40 mm using stainless steel files. Thirty teeth were randomly stored as the negative control group. A total of 120 specimens were obturated with gutta-percha and AH Plus sealer using vertical compaction technique...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28744859/lateral-and-axial-cutting-efficiency-of-instruments-manufactured-with-conventional-nickel-titanium-and-novel-gold-metallurgy
#18
R A Vasconcelos, A Arias, O A Peters
AIM: To isolate the effect of metallurgy in lateral and axial cutting efficacy against plastic and bovine dentine substrates by comparing two rotary systems with identical design but manufactured with either conventional nickel-titanium or heat-treated gold alloy. METHODOLOGY: A total of 258 ProTaper Universal (PTU) and ProTaper Gold (PTG) Shaping instruments were used. Bending behaviour was assessed to determine the appropriate displacement associated with a 2 N force in lateral cutting...
July 26, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28736602/radiographic-technical-quality-of-root-canal-treatment-performed-by-a-new-rotary-single-file-system
#19
Marco Colombo, Cristina Bassi, Riccardo Beltrami, Paolo Vigorelli, Antonio Spinelli, Andrea Cavada, Alberto Dagna, Marco Chiesa, Claudio Poggio
AIM: The aim of the present study was to evaluate radiographically the technical quality of root canal filling performed by postgraduate students with a new single-file Nickel-Titanium System (F6 Skytaper Komet) in clinical practice. METHODS: Records of 74 patients who had received endodontic treatment by postgraduate students at the School of Dentistry, Faculty of Medicine, University of Pavia in the period between September 2015 and April 2016 were collected and examined: the final sample consisted 114 teeth and 204 root canals...
January 2017: Annali di Stomatologia
https://www.readbyqxmd.com/read/28735794/influence-of-different-kinematics-on-apical-extrusion-of-irrigant-and-debris-during-canal-preparation-using-k3xf-instruments
#20
Mustafa Toyoğlu, Demet Altunbaş
INTRODUCTION: This in vitro study was designed to evaluate the amount of apically extruded irrigant and debris during root canal preparation using K3XF instruments (SybronEndo, Orange, CA) with different kinematics and using hand files with a step-back technique. METHODS: A total of 80 extracted mandibular premolars were selected and randomly assigned to 4 groups (n = 20). The root canals were instrumented with K-type stainless steel instruments using a step-back technique and with the K3XF system using the following kinematics: reciprocating motion, adaptive motion, and continuous rotation...
July 20, 2017: Journal of Endodontics
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