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https://www.readbyqxmd.com/read/29675119/microscopic-features-of-fractured-fragment-of-nickel-titanium-endodontic-instruments-by-two-different-modes-of-torsional-loading
#1
Ibrahim H Abu-Tahun, Sang Won Kwak, Jung-Hong Ha, Hyeon-Cheol Kim
This study compared the microscopic features of the fractured endodontic nickel-titanium (NiTi) rotary instruments by two different torsional loadings: repetitive torsional loading (RTL) and single torsional loading (STL) based on the International Organization for Standardization (ISO). ProTaper Next, HyFlex EDM, and V-Taper 2 were compared in this study. In the STL method, the torsional load was applied after fixing the 3 mm tip of the file, by continuous clockwise rotation (2 rpm) until fracture. In the RTL method, a preset rotational loading (0...
2018: Scanning
https://www.readbyqxmd.com/read/29628643/protocols-for-sodium-ascorbate-application-on-intracoronary-dentin-bleached-with-high-concentrated-agent
#2
Thiago Vinicius Cortez, Isabella Rodrigues Ziotti, Renata Siqueira Scatolin, Silmara Aparecida Milori Corona, Aline Evangelista Souza-Gabriel
Purpose: Composite resin restorations are normally replaced after the internal bleaching of endodontically treated-teeth because the bleaching agent does not alter the color of the restorative material. This study evaluated the effect of 10% sodium ascorbate (SA) applied at different protocols on bleached dentin. Materials and Methods: One-hundred slabs of intracoronary bovine dentin were divided into 5 groups: 2 controls-GI without bleaching (positive), GII bleached with 35% hydrogen peroxide (HP) (negative); and 3 experimentals - GIII...
January 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29609575/influence-of-iroot-sp-and-mineral-trioxide-aggregate-on-the-activation-and-polarization-of-macrophages-induced-by-lipopolysaccharide
#3
Zhenglin Yuan, Xiaodan Zhu, Yuhong Li, Ping Yan, Han Jiang
BACKGROUND: Biomaterials could affect the inflammation reaction and wound healing via the activation and polarization of macrophages. However, the influence of iRoot SP and mineral trioxide aggregate (MTA) on macrophage polarization under inflammatory conditions was not reported although these two root filling materials have been applied extensively in patients undergoing endodontic treatment. Therefore, the present study aimed to explore the mechanism how iRoot SP and MTA affect the cell behavior of RAW 264...
April 2, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29605628/exploring-different-photodynamic-therapy-parameters-to-optimize-elimination-of-enterococcus-faecalis-planktonic-forms
#4
Janir Alves Soares, Suelleng Maria Cunha Santos Soares, Rudys Rodolfo de Jesus Tavarez, Claudia de Castro Rizzi, Silvana Cristina Gama Vaz Rodrigues, Etevaldo Matos Maia Filho, Manoel Brito-Júnior, Rodrigo Dantas Pereira, Paula Prazeres Magalhães, Luiz de Macêdo Farias
BACKGROUND: The failure of endodontic treatment is linked to the presence of Enterococcus faecalis in the root canals. The scope of study was to evaluate the influence of the energy dose and frequency of photodynamic therapy (PDT cycles), as well as the volume of bacterial suspensions (BS) in the elimination of Enterococcus faecalis planktonic forms. METHODS: In four successive assays BS of Enterococcus faecalis ATCC 19433 were irradiated with a diode laser (40 mW) using the photosensitizer (PS) methylene blue (MB) (0...
March 29, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29571913/is-the-use-of-dexamethasone-effective-in-controlling-pain-associated-with-symptomatic-irreversible-pulpitis-a-systematic-review
#5
REVIEW
Brenna M L Nogueira, Ludmylla G Silva, Carla R M Mesquita, Sílvio A F Menezes, Tatiany O A Menezes, Antônio G M Faria, Mariana T M Porpino
INTRODUCTION: Endodontic pain is a symptom of pulpal and/or periapical inflammation. One strategy for pain reduction is using medications, such as dexamethasone. A definitive protocol for preventing and controlling pain caused by irreversible pulpitis during endodontic treatment has not yet been established. This is a systematic review to answer the following question: is the use of dexamethasone effective in controlling pain associated with symptomatic irreversible pulpitis? METHODS: This study was registered in the PROSPERO database (CRD42017058704), and Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement recommendations were followed...
March 20, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29571907/the-effects-of-endodontic-access-cavity-preparation-design-on-the-fracture-strength-of-endodontically-treated-teeth-traditional-versus-conservative-preparation
#6
Taha Özyürek, Özlem Ülker, Ebru Özsezer Demiryürek, Fikret Yılmaz
INTRODUCTION: The aim of this study was to compare the fracture strengths of mandibular molar teeth prepared using traditional endodontic cavity (TEC) and conservative endodontic cavity (CEC) methods and restored using SDR (Dentsply Caulk, Milford, DE) and EverX Posterior (GC Dental, Tokyo, Japan) base composite materials. METHODS: A hundred mandibular first molar teeth were randomly divided into 5 groups. In group 1 (the control group), samples were kept intact...
March 20, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29550005/cytotoxicity-of-a-new-calcium-silicate-endodontic-sealer
#7
Triantafyllia Vouzara, Garyfallia Dimosiari, Elisabeth A Koulaouzidou, Nikolaos Economides
INTRODUCTION: Resin sealers with biocompatible and bioactive additives have been used in clinical practice. Recently, a calcium silicate root canal sealer was introduced under the name BioRoot RCS (Septodont, Saint Maur-des-Fossés, France). The aim of this study was to evaluate the effects of BioRoot RCS on cell survival and proliferation of cultured cells in parallel with an epoxy resin sealer with calcium phosphate and calcium oxide and a salicylate resin sealer with mineral trioxide aggregate filler...
March 14, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29504878/effect-of-chlorhexidine-treatment-prior-to-fiber-post-cementation-on-long-term-resin-cement-bond-strength
#8
M Durski, M Metz, G Crim, S Hass, R Mazur, S Vieira
The purpose of this study was to evaluate the push-out bond strength of two different adhesive cements (total etch and self-adhesive) for glass fiber post (GFP) cementation in simulated, long-term service (thermocycling) when the root canal is treated with chlorhexidine before cementation. One hundred twenty premolar specimens with a single root canal were selected, endodontically treated, and shaped for GFP cementation (n=120). The specimens were randomly placed into one of 12 groups (10 specimens each) according to cement (T = total-etch RelyX ARC or S = self-adhesive RelyX Unicem), treatment with chlorhexidine (N or Y: without or with), and number of thermal cycles (00, 20, or 40: 0, or 20,000 or 40,000 cycles): 1...
March 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29459149/root-canal-irrigants-and-medicaments-in-endodontic-malpractice-cases-a-nationwide-longitudinal-observation
#9
Outi Swanljung, Miira M Vehkalahti
INTRODUCTION: The aim of this study was to assess the role of root canal irrigants and medicaments in endodontic injuries verified in Finland and to estimate the rate of such events over time. METHODS: The study material comprised all endodontic injuries verified by the Patient Insurance Centre in 2002 to 2006 (n = 521) and 2011 to 2013 (n = 449). The data, based on patient documents scrutinized by 2 specialists in endodontics, included patients' and dentists' sex and age and the service sector...
February 16, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29451648/3-d-finite-element-analysis-of-the-effects-of-post-location-and-loading-location-on-stress-distribution-in-root-canals-of-the-mandibular-1st-molar
#10
Hong Gi Yoon, Hyun Keun Oh, Dong-Yul Lee, Joo-Hee Shin
Objective The purpose of this study was to evaluate, by using finite element analysis, the influence of post location and occlusal loading location on the stress distribution pattern inside the root canals of the mandibular 1st molar. Material and Methods Three different 3-D models of the mandibular 1st molar were established: no post (NP) - a model of endodontic and prosthodontic treatments; mesiobuccal post (MP) - a model of endodontic and prosthodontic treatments with a post in the mesiobuccal canal; and distal post (DP) - a model of endodontic and prosthodontic treatments with a post in the distal canal...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29442086/effect-of-preoperative-ibuprofen-in-controlling-postendodontic-pain-with-and-without-low-level-laser-therapy-in-single-visit-endodontics-a-randomized-clinical-study
#11
Shahnaz Nabi, Khalid Amin, Aijaz Masoodi, Riyaz Farooq, Aamir Rashid Purra, Fayaz Ahmad Ahangar
Aim: The aim of this study is to evaluate the effect of low-level laser irradiation and ibuprofen in reducing the onset and severity of postoperative pain following single visit endodontics. Materials and Methods: One hundred and twenty patients were recruited for this study. Group A (n = 30) patients were administered 400 mg of ibuprofen orally 1 h before the institution of an endodontic procedure. Group B (n = 30) patients were given irradiation of a low-level laser at 50 Hz for 3 min after the standard endodontic procedure at the periapical region on both buccal and lingual aspect...
January 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/29435208/reasonable-outcome-of-avulsed-permanent-upper-incisor-after-seven-years-follow-up-period-a-case-report
#12
Egle Bendoraitiene, Sandra Zemgulyte, Marija Borisovaite
Background: Avulsion of the permanent teeth is one of the most serious oral health problems among active children and adolescents. Traumatized patients require immediate and correct treatment in order to restore damaged structures and function that have major impact on daily patient's life. As a result, proper guidelines and fast treatment methods are necessary. This case report discusses treatment of maxillary right central incisor with an open apex that had been avulsed and replanted...
October 2017: Journal of Oral & Maxillofacial Research
https://www.readbyqxmd.com/read/29420856/antimicrobial-photodynamic-therapy-as-a-co-adjuvant-in-endodontic-treatment-of-deciduous-teeth-case-series
#13
Camila Basilio Okamoto, Lara Jasinski Motta, Renato Araujo Prates, Ana Carolina Costa da Mota, Marcela Leticia Leal Gonçalves, Anna Carolina Ratto Tempestini Horliana, Raquel Agnelli Mesquita Ferrari, Kristianne Porta Santos Fernandes, Sandra Kalil Bussadori
To assure the success of endodontic treatment, the root canal must be completely decontaminated. Thus, some methods have been researched in an attempt to effectively eliminate microorganisms from the interior of the root canal system. Among them, is conventional endodontic therapy in conjunction with photodynamic therapy (PDT). Five anterior deciduous teeth were treated endodontically with the conventional technique and PDT. For PDT, 0.005% methylene blue was used as a photosensitizer and a 660nm laser. After the conventional endodontic therapy, the photosensitizer was applied inside the root canal, 3 minutes of pre-irradiation time and then the laser was applied for 40s with an energy of 4J...
February 8, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29387620/comparative-evaluation-of-fracture-resistance-of-different-post-systems
#14
Mavari Karibasappa Saritha, Uttam Paul, Kiran Keswani, Ashu Jhamb, Swapnil Haribhau Mhatre, Pradyumna Kumar Sahoo
Aim: The study was done to evaluate the fracture resistance of carbon, glass fiber, and zirconia posts. Materials and Methods: Forty-five human premolars indicated for orthodontic extraction were subjected to root canal treatment and obturated with gutta-percha. All the teeth were decoronated and mounted in acrylic block. Then, teeth were equally divided into three groups: (a) carbon, (b) glass fiber, and (c) zirconia post group. Post space was prepared and particular post was cemented in post space...
November 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29386773/shear-bond-strength-of-different-restorative-materials-to-mineral-trioxide-aggregate-and-biodentine
#15
Fatih Tulumbaci, Merve Erkmen Almaz, Volkan Arikan, Merve Safa Mutluay
Significance of Study: Mineral trioxide aggregate (MTA) and Biodentine (calcium silicate-based materials) have great importance in dentistry. There is no study comparing the bond strength of Biodentine and MTA for composite, compomer, and compomer or resin-modified glass ionomer (RMGIC). Although many advantages of Biodentine over MTA; in this study, MTA has shown better shear bond strength (SBS) to restorative materials. Aim: Recently, a variety of calcium silicate-based materials are often used for pulp capping, perforation repair, and endodontic therapies...
September 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29368140/efficacy-of-a-single-session-protocol-for-endodontic-treatment-in-primary-teeth-in-vivo-study
#16
T C Triches, G S Zimmermann, S F T de Freitas, M Ximenes, R S Vieira, M M R Cordeiro
AIMS: To determine the efficacy of a single session protocol (SSP) in the reduction of septic content of primary teeth root canals and identify the persistence of bacterial species associated with unsuccessful treatment. METHODS: Primary teeth root canals (16) with pulp necrosis and peri-radicular lesions were treated. Samples were collected at baseline (T1), and after chemo-mechanical preparation, before filling (T2). Identification of the microorganisms was determined using checkerboard DNA-DNA hybridisation...
January 24, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29358547/pre-endodontic-post-and-core-technique-for-endodontic-and-prosthodontic-treatment
#17
Keita Sasaki, Takatsugu Yamamoto, Tomoko Ikawa, Yuko Shigeta, Shuji Shigemoto, Eriko Ando, Takumi Ogawa, Keisuke Ihara
INTRODUCTION: Displacement of provisional fixed prostheses may result in undesirable and embarrassing outcomes in dental treatments, especially in endodontic treatment. Development of certain counter measures has been necessary to avoid such discomforts. AIM: The aim of this report was to propose a pre-endodontic post and core technique to achieve smooth progress of the treatment. MATERIALS AND METHODS: The patient was a 59-year-old male diagnosed with an infraocclusion caused by wear of his teeth...
January 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29290183/comparison-of-retrograde-primary-and-secondary-bonding-materials-with-tooth-substance
#18
Tabinda Nawaz Khan, Syed Yawar Ali Abidi
OBJECTIVE: To compare the microleakage of MTA (mineral trioxide aggregate) and resin-modified GIC (glass ionomer vitremer) as retrograde endodontic material. STUDY DESIGN: Experimental study. PLACE AND DURATION OF STUDY: Operative Department of DIIKIOHS (DUHS) and NED University, Karachi, from February to June 2014. METHODOLOGY: Forty human anterior teeth were divided into four groups. Each tooth was endodontically treated...
January 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29279548/concept-and-clinical-application-of-the-resin-coating-technique-for-indirect-restorations
#19
Toru Nikaido, Junji Tagami, Hirofumi Yatani, Chikahiro Ohkubo, Tomotaro Nihei, Hiroyasu Koizumi, Toshio Maseki, Yuichiro Nishiyama, Tomoyoshi Takigawa, Yuji Tsubota
The resin-coating technique is one of the successful bonding techniques used for the indirect restorations. The dentin surfaces exposed after cavity preparation are coated with a thin film of a coating material or a dentin bonding system combined with a flowable composite resin. Resin coating can minimize pulp irritation and improve the bond strength between a resin cement and tooth structures. The technique can also be applied to endodontically treated teeth, resulting in prevention of coronal leakage of the restorations...
March 30, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29261125/rheological-characterization-as-an-alternative-method-to-indentation-for-determining-the-setting-time-of-restorative-and-endodontic-cements
#20
William N Ha, Timothy M Nicholson, Bill Kahler, Laurence J Walsh
This study explored an alternative approach using rheology to assess setting time. The following cements were tested: ProRoot® MTA (Dentsply, Tulsa, OK, USA), Biodentine® (Septodont, Saint Maur des Fosses, France), Fuji VII® , FujiVII® EP, and Fuji IX® (from GC Corporation, Tokyo, Japan), RealSeal SE™ Sealer (SybronEndo, Amersfoort, The Netherlands), AH 26® and AH Plus (both from Dentsply DeTrey, Konstanz, Germany). Freshly mixed cements were placed into a strain-controlled rheometer (1 rad·s-1 with an applied strain of 0...
December 20, 2017: Materials
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