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https://www.readbyqxmd.com/read/28918912/evaluation-of-the-root-and-canal-systems-of%C3%A2-maxillary-molars-in-taiwanese-patients-a%C3%A2-cone%C3%A2-beam-computed-tomography-study
#1
Yu-Hua Lin, Hsiu-Na Lin, Chien-Chih Chen, May-Show Chen
BACKGROUND: This study evaluated variations in root canal configuration in the maxillary permanent molars of Taiwanese patients by analyzing patients' cone beam computed tomography (CBCT) images. Comparisons were made among these configurations and those previously reported. This information may serve as a basis for improving the success rate of endodontic treatment. METHODS: The root canal systems of 114 Taiwanese patients with bilateral maxillary first or second molars were examined using CBCT images...
August 2017: Biomedical Journal
https://www.readbyqxmd.com/read/28916389/removal-and-killing-of-multispecies-endodontic-biofilms-by-n-acetylcysteine
#2
Young-Suk Choi, Cheul Kim, Ji-Hoi Moon, Jin-Yong Lee
Removal of bacterial biofilm from the root canal system is essential for the management of endodontic disease. Here we evaluated the antibacterial effect of N-acetylcysteine (NAC), a potent antioxidant and mucolytic agent, against mature multispecies endodontic biofilms consisting of Actinomyces naeslundii, Lactobacillus salivarius, Streptococcus mutans and Enterococcus faecalis on sterile human dentin blocks. The biofilms were exposed to NAC (25, 50 and 100mg/mL), saturated calcium hydroxide or 2% chlorhexidine solution for 7 days, then examined by scanning electron microscopy...
September 2, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28912942/efficacy-of-sodium-hypochlorite-activated-with-laser-in-intracanal-smear-layer-removal-an-sem-study
#3
Shahriar Shahriari, Shahin Kasraei, Ghodratollah Roshanaei, Hamed Karkeabadi, Hossein Davanloo
Introduction: The purpose of the present study was to evaluate the different concentrations of sodium hypochlorite activated with laser in removing of the smear layer in the apical, middle, and coronal segments of root canal walls by scanning electron microscopy analysis. Methods: Sixty single-rooted human mandibular teeth were decoronated to a standardized length. The samples were prepared by using Race rotary system to size 40, 0.04 taper and divided into 4 equal groups (n = 15). Group 1, irrigated with EDTA 17% and 5...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/28894386/oxidative-stress-in-patients-with-endodontic-pathologies
#4
Veiko Vengerfeldt, Reet Mändar, Mare Saag, Anneli Piir, Tiiu Kullisaar
BACKGROUND: Apical periodontitis (AP) is an inflammatory disease affecting periradicular tissues. It is a widespread condition but its etiopathogenetic mechanisms have not been completely elucidated and the current treatment options are not always successful. PURPOSE: To compare oxidative stress (OxS) levels in the saliva and the endodontium (root canal [RC] contents) in patients with different endodontic pathologies and in endodontically healthy subjects. PATIENTS AND METHODS: The study group of this comparison study included 22 subjects with primary chronic apical periodontitis (pCAP), 26 with posttreatment or secondary chronic apical periodontitis (sCAP), eight with acute periapical abscess, 13 with irreversible pulpitis, and 17 healthy controls...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28893051/permanent-maxillary-central-incisor-with-dilacerated-crown-and-root-and-c-shaped-root-canal
#5
Vikas Allwani, Mansing Pawar, Ajinkya Pawar, Sayed Abrar, Sangeeta Ambhore
Dilaceration is a rare disturbance in traumatised permanent teeth, which constitutes about 3% of the injuries to developing teeth. It usually occurs as a result of trauma to the deciduous predecessors and results in non axial displacement of the already formed hard tissue portion of the developing crown. Endodontic treatment of such teeth presents a challenge to clinicians, and careful management is required to successfully address the root canal anatomy and other possible variations. The C-shaped canal configuration is most frequently seen in mandibular second molars, but this variation may also occur in mandibular first molars, mandibular third molars, maxillary molars, mandibular first premolars, and even in maxillary lateral incisors, with rare reports of such variations occurring in the maxillary central incisors...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28883300/irrigation-effectiveness-of-continuous-ultrasonic-irrigation-system-an-ex-vivo-study
#6
Ahmed Jamleh, Hideaki Suda, Carlos G Adorno
This study evaluated the irrigation extrusion and smear layer (SL) removal of continuous ultrasonic irrigation (CUI). Forty root canals were shaped, embedded in warm sterile saline agar colored with 1% acid red, and distributed into four groups; three groups had the final irrigation sequence of sodium hypochlorite and EDTA solutions performed by using syringe irrigation (SI), EndoVac (EV), and CUI, respectively. Group 4 had the canals ultrasonically irrigated with saline (CUIS). Irrigant extrusion was verified by a color change of the agar...
September 7, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28874653/shaping-of-the-root-canal-system-a-multistep-technique
#7
Livio Gallottini
AIM: The aim of this scientific work is to illustrate the technique of shaping the root canal system using the multistep technique. BACKGROUND: Over time, various endodontic instrumentation techniques have been put forward, from the "step-back" technique (apical-coronal) to the "crown-down" technique (coronal-apical), the "double-flared" technique, and the most recent "single-length" technique. TECHNIQUE: The multistep technique involves six steps, one of the main objectives of these being the safety of the use of mechanical instruments with a reduction in the risk that they fracture...
September 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28874643/evaluation-of-apical-vapor-lock-formation-and-comparative-evaluation-of-its-elimination-using-three-different-techniques-an-in-vitro-study
#8
Anand Agarwal, Rahul B Deore, Kavitarani Rudagi, Zinnie Nanda, Mirza Osman Baig, Md Adil Fareez
AIM: The aim of this study was (i) to evaluate the formation of air bubbles in the apical region of root canal (apical vapor lock) during syringe irrigation, using cone beam computed tomography (CBCT) and (ii) comparative evaluation of the elimination of an established vapor lock by EndoActivator, ultrasonics, and manual dynamic agitation (MDA), using CBCT. MATERIALS AND METHODS: A total of 60 extracted human single-rooted teeth were equally divided into three groups of 20 teeth each...
September 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28874634/root-canal-morphologies-of-mesiobuccal-roots-of-maxillary-molars-using-cone-beam-computed-tomography-and-periapical-radiographic-techniques-in-an-iranian-population
#9
Vahid Zand, Hadi Mokhtari, Hamid Rm Zonouzi, Sahand N Shojaei
AIM: The aim of this study was to evaluate the accuracy of the results of cone beam computed tomography (CBCT) examinations, confirm the presence or absence of the second mesiobuccal (MB2) root canal in maxillary first and second molars, estimate the distance between the root canal orifices, observe the root types based on Vertucci classification system, and make comparisons between CBCT and periapical techniques in relation to the identification of the root canal form and the second root canal of the MB root...
September 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28864218/the-association-between-the-anatomic-landmarks-of-the-pulp-chamber-floor-and-the-prevalence-of-middle-mesial-canals-in-mandibular-first-molars-an-in%C3%A2-vivo-analysis
#10
Navid Akbarzadeh, Anita Aminoshariae, Navid Khalighinejad, J Martin Palomo, Syed Ali, James C Kulild, Ghazal Sadeghi, Andre Mickel
INTRODUCTION: The present study aimed to determine the incidence and anatomic variation of the middle mesial (MM) canal in mandibular permanent first molars using cone-beam computed tomographic imaging and to evaluate the association between the presence of MM canals and anatomic landmarks of the pulp chamber floor in the mesial root. METHODS: In this in vivo cross-sectional study, 210 CBCT scans of mandibular fist molars from 210 patients were included. CBCT scans were evaluated in 3 sections, and the following data were collected for further analysis: identification of the MM canal, the distance between the mesiobuccal (MB) and mesiolingual (ML) orifices, the presence of any isthmus between the MB and ML orifices, and the MB and ML root canal system (RCS) configurations...
August 29, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28855758/effect-of-glide-path-preparation-on-apical-extrusion-of-debris-in-root-canals-instrumented-with-three-single-file-systems-an-ex-vivo-comparative-study
#11
Ajinkya M Pawar, Mansing Pawar, Anda Kfir, Bhagyashree Thakur, Pooja Mutha, Kulwinder Singh Banga
AIM: The aim of this study was to test the effect of new protocol of glide path preparation by 20/0.04 rotary file on apical extrusion of debris when instrumenting fine curved mesial canals in mandibular molars with Self-adjusting File (SAF) and compare it to a glide path prepared by 20/0.02 hand K-file and rotary OneShape (OS) and reciprocating WaveOne (WO) file instrumentation. MATERIALS AND METHODS: Sixty mandibular molars with curved mesial roots were selected and randomly divided into three groups (n = 20) for instrumentation...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28855757/canal-transportation-and-centering-ability-of-protaper-and-self-adjusting-file-system-in-long-oval-canals-an-ex-vivo-cone-beam-computed-tomography-analysis
#12
Dipali Yogesh Shah, Swati Ishwara Wadekar, Ashwini Manish Dadpe, Ganesh Ranganath Jadhav, Lalit Jayant Choudhary, Dheeraj Deepak Kalra
CONTEXT AND AIMS: The purpose of this study was to compare and evaluate the shaping ability of ProTaper (PT) and Self-Adjusting File (SAF) system using cone-beam computed tomography (CBCT) to assess their performance in oval-shaped root canals. MATERIALS AND METHODS: Sixty-two mandibular premolars with single oval canals were divided into two experimental groups (n = 31) according to the systems used: Group I - PT and Group II - SAF. Canals were evaluated before and after instrumentation using CBCT to assess centering ratio and canal transportation at three levels...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28855755/comparison-of-apical-debris-extrusion-during-root-canal-preparation-using-instrumentation-techniques-with-two-operating-principles-an-in-vitro-study
#13
Mudita Verma, N Meena, R Anitha Kumari, Sudhanva Mallandur, R Vikram, Vishwas Gowda
AIMS: The aim of this study was to quantify the debris extruded apically from teeth using rotary and reciprocation instrumentation systems. SUBJECTS AND METHODS: Eighty extracted human mandibular premolars with single canals and similar lengths were instrumented using ProTaper Universal (40, 06; Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Next (40, 06; Dentsply Maillefer, Ballaigues, Switzerland), WaveOne (40, 06; Dentsply Maillefer, Ballaigues, Switzerland), and Reciproc (R40; VDW GmbH, Munich, Germany)...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28855749/a-cone-beam-computed-tomography-assessment-of-the-efficacy-of-different-irrigation-devices-for-removal-of-silicone-oil-based-calcium-hydroxide-from-root-canal-system
#14
Pradeep Kumar, Ida de Noronha de Ataide, Marina Fernandes, Rajan Lambor
BACKGROUND: Most often used intracanal medicament is calcium hydroxide (Ca(OH)2). Removal of Ca(OH)2 before obturation is mandatory. Different irrigation solutions and devices were tested in the previous study for this purpose. AIM: The aim of this study was to evaluate the comparative efficacy of different irrigation techniques in removing intracanal medicament using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: Cleaning and shaping was carried out in 42 freshly extracted single-rooted mandibular first premolars using Protaper Rotary Files...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28855748/comparative-evaluation-of-apically-extruded-debris-during-root-canal-instrumentation-using-two-ni-ti-single-file-rotary-systems-an-in-vitro-study
#15
Kiran Singbal, Disha Jain, Kranthi Raja, Tan Ming Hoe
BACKGROUND: Apical extrusion of debris during instrumentation is detrimental to the patient. AIM: The aim of this study was to evaluate the apical extrusion of debris during root canal instrumentation using two single file rotary Ni-Ti systems. MATERIALS AND METHODS: Thirty freshly extracted mandibular premolars with straight roots were sterilized and divided into two groups instrumented using: One Shape rotary Ni-Ti system with Endoflare orifice shaper (Group 1) and Neo-Niti rotary Ni-Ti system with C1 orifice shaper (Group 2)...
March 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28853516/-intentional-replantation-for-the-treatment-of-palatal-radicular-groove-with-endo-periodontal-lesion-in-the-maxillary-lateral-incisor-a-case-report
#16
Tan Xuelian, Zhang Lan, Huang Dingming
Palatal radicular groove leads to severe endo-periodontal lesion in lateral incisors. The groove occurs on the labial and lingual root surfaces, while the localized periodontal pocket develops along the lingual groove length. The complicated root canal system, extensively destroyed bone lamella, and persistent fistula pose a challenge for root canal therapy, tooth retention, and thorough infection control inside and outside of the root canal. Combining microscopic root canal therapy with intentional replantation and nano-biomaterial application facilitates infection control, tooth retention, and formation of newly periodontal attachment...
August 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28853151/a-preliminary-assessment-of-a-new-dedicated-endodontic-software-for-use-with-cbct-images-to-evaluate-the-canal-complexity-of-mandibular-molars
#17
G Gambarini, P Ropini, L Piasecki, R Costantini, E Carneiro, L Testarelli, P M H Dummer
AIM: To investigate in vivo the complexity of canals within mesial roots of mandibular molars using 3D Endo(™) software linked to CBCT images. METHODOLOGY: The CBCT images of 100 mandibular first molars were analyzed using the 3D Endo(™) software. The number of canals in the mesial roots, the presence of apical confluences, the canal lengths and the canal configurations using Vertucci's classification were evaluated in bucco-lingual (BL) and mesio-distal (MD) views...
August 29, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28852640/modified-revascularization-in-human-teeth-using-an-intracanal-formation-of-treated-dentin-matrix-a-report-of-two-cases
#18
Payman Mehrvarzfar, Paul V Abbott, Hengameh Akhavan, Sohrab Tour Savadkouhi
Ethylenediaminetetraacetic acid (EDTA)-treated dentin matrix (TDM) is an enriched source of bioactive molecules. Therefore, it was hypothesized that fabrication of autogenous TDM on root dentinal walls of necrotic immature permanent teeth may allow more predictable outcome of revascularization treatments. Two young patients with permanent nonvital immature teeth were chosen for revascularization treatment. After appropriate disinfection of root canal system, TDM was fabricated on root dentinal walls using different dilutions of EDTA...
July 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28846160/efficacy-of-different-irrigant-protocols-and-application-systems-on-sealer-penetration-using-a-stepwise-clsm-analysis
#19
Hacer Aksel, Selen Küçükkaya Eren, Nuhan Puralı, Ahmet Serper, Adham A Azim
This study compared several irrigation protocols and application systems for sealer penetration into dentinal tubules. Single-rooted-human teeth were divided into 5 experimental groups (n = 15) and a control group (n = 5), according to final irrigation protocols: standard needle irrigation (SNI); Vibringe; Vibringe + NaviTip FX (Vibringe NFX); Endo Spray (ES); and passive-ultrasonic-irrigation (PUI). Following obturation of the root canals, the percentage of the sealer penetration was measured at different depths using stepwise CLSM analysis...
August 28, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28846134/mineral-trioxide-aggregate-and-other-bioactive-endodontic-cements-an-updated-overview-part-ii-other-clinical-applications-and-complications
#20
REVIEW
M Torabinejad, M Parirokh, P M H Dummer
Mineral trioxide aggregate (MTA) is a dental material used extensively for vital pulp therapy (VPT), scaffold cover during regenerative endodontic procedures, apical barrier in teeth with necrotic pulps and open apices, perforation repair, and root canal filling and root-end filling during surgical endodontics. A number of bioactive endodontic cements (BECs) have recently been introduced to the market. Most of these materials had calcium and silicate in their compositions; however, the bioactivity is the common property of these cements...
August 28, 2017: International Endodontic Journal
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