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https://www.readbyqxmd.com/read/29922335/comparative-evaluation-of-enterococcus-faecalis-counts-in-different-tapers-of-rotary-system-and-irrigation-fluids-an-ex-vivo-study
#1
Amir Arsalan Navabi, Abbas Ali Khademi, Masoud Khabiri, Paridokht Zarean, Parichehr Zarean
Background: Bacteria and their by-products are etiological factors for the failure of endodontic treatment. Reduction of root canal bacterial contamination is one of the chief aims of root canal therapy. The aim of this study was to compare the effects of different rotary file tapers and two irrigation fluids on Enterococcus faecalis counts. Materials and Methods: In this ex vivo study Root canals of 72 human upper lateral incisors were enlarged to ISO #20 K-file...
May 2018: Dental Research Journal
https://www.readbyqxmd.com/read/29897599/schirmer-s-i-modified-schirmer-s-i-phenol-red-thread-and-paper-point-tests-a-comparative-study-for-tear-production-measurement-techniques-in-broiler-chicks-gallus-gallus-domesticus
#2
Gabrielle Fornazari, Thiago Alegre Coelho Ferreira, Elizabeth Santin, Josiane Carla Panisson, Alex Maiorka, Fabiano Montiani-Ferreira
Problems with indoor husbandry and immunological challenges are some of the stressors that broilers may face which can affect production. Infectious diseases can compound the effects of excessive concentrations of ammonia causing respiratory and ocular inflammation and increased lacrimal production in broiler chickens. The objectives of this investigation were to establish normal values of tear production in chicks and compare the practicality of the different methods. Palpebral fissure length (PFL) and tear production were evaluated in Cobb 500 chicks at 5 d old and then at 5 d of age by the following methods: modified Schirmer's test I (mSTT1), phenol red cotton thread tear test (PRCTTT), and standardized endodontic absorbent paper point test (EAPPTT)...
June 8, 2018: Poultry Science
https://www.readbyqxmd.com/read/29866990/an-in-vitro-model-for-candida-albicans%C3%A2-streptococcus-gordonii-biofilms-on-titanium-surfaces
#3
Daniel Montelongo-Jauregui, Anand Srinivasan, Anand K Ramasubramanian, Jose L Lopez-Ribot
The oral cavity serves as a nutrient-rich haven for over 600 species of microorganisms. Although many are essential to maintaining the oral microbiota, some can cause oral infections such as caries, periodontitis, mucositis, and endodontic infections, and this is further exacerbated with dental implants. Most of these infections are mixed species in nature and associated with a biofilm mode of growth. Here, after optimization of different parameters including cell density, growth media, and incubation conditions, we have developed an in vitro model of C...
June 4, 2018: Journal of Fungi (Basel, Switzerland)
https://www.readbyqxmd.com/read/29850275/a-predictable-aesthetic-rehabilitation-of-deciduous-anterior-teeth-in-early-childhood-caries
#4
Priyanka Agarwal, Rashmi Nayak, Ghayathri Elangovan
Aesthetic dentistry plays a significant role not only in adults but also in pediatric patients. However, a pediatric dentist is faced with the dual problem of satisfying the aesthetic expectations of the patient and parents as well as managing the pediatric patient. In the present era, there are numerous restorative techniques that can be applied to different clinical scenarios. However, we have to choose the technique that best suits our patient, not only biologically but also aesthetically, psychologically, functionally, and financially...
2018: Case Reports in Dentistry
https://www.readbyqxmd.com/read/29805399/effect-of-intracanal-medicaments-used-in-endodontic-regeneration-on-the-push-out-bond-strength-of-a-calcium-phosphate-silicate-based-cement-to-dentin
#5
Elif Aybala Oktay, Seyda Ersahan, Selcuk Gokyay
Objective: To evaluate the effects of various endodontic regeneration agents on the push-out bond strength of Endosequence Root Repair Material (ERRM) to root-canal dentin. Methods: Fifty single-rooted human teeth were selected and instrumented to obtain a standard internal diameter of 1.5 mm. Specimens were randomly divided into four experimental groups and treated with an intracanal medicament [calcium hydroxide (CH), double antibiotic paste (DAP), triple antibiotic paste (TAP), TAP with amoxicillin (mTAP)] and a non-treated control group...
March 2018: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29800744/detection-of-the-antibiotic-resistance-genes-blatem-1-cfxa-tetq-tetm-tetw-and-ermc-in-endodontic-infections-of-a-mexican-population
#6
Rubén Abraham Domínguez-Pérez, Rocio De la Torre-Luna, Mariana Ahumada-Cantillano, Ma Soledad Vázquez-Garcidueñas, Rosa Martha Pérez-Serrano, Rita Elizabeth Martínez-Martínez, Ana Laura Guillén-Nepita
OBJECTIVES: To identify the prevalence of genes encoding resistance to three groups of antibiotics in root canals with primary infection or post-treatment disease. METHODS: Sixty four subjects who needed root canal treatment because of primary infection or post-treatment disease were enrolled in the present cross-sectional analytic study. Root canal samples were obtained, and DNA isolated. Specific primers for six antibiotic resistance genes and seven bacterial taxa (five genera and two species) were used...
May 22, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29791567/immunohistological-study-of-the-effect-of-vascular-endothelial-growth-factor-on-the-angiogenesis-of-mature-root-canals-in-rat-molars
#7
Cleber Keiti Nabeshima, José Edgar Valdivia, Hector Caballero-Flores, Victor Elias Arana-Chavez, Manoel Eduardo de Lima Machado
Tissue bioengineering has been applied to Endodontics to seek a more biological treatment. The presence of blood vessels is crucial for cell nutrition during tissue formation. Objective This study analysed the application of vascular endothelial growth factor (VEGF) in the angiogenesis of mature root canals. Material and methods Upper first molars of twelve 13-week old Wistar male rats were used. The root pulp of the mesiobuccal canal was removed and the root canal instrumented with K-files up to size #25. Periapical bleeding was induced into the root canal by introducing a #15 K-file beyond the apex...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29768091/effect-of-830-nm-diode-laser-irradiation-of-root-canal-on-bond-strength-of-metal-and-fiber-post
#8
Claudia Strefezza, Marcello Magri Amaral, José Quinto, Sheila Cynthia Gouw-Soares, Claudia Bianchi Zamataro, Denise Maria Zezell
OBJECTIVE AND BACKGROUND: The correct selections of the cementing agent, the endodontic post material and placement protocol are critical to provide an increased longevity of the teeth that went through endodontic treatment. The irradiation with diode laser before post cementation, can promote an antimicrobial effect. However, there is a lack of information about the effect of 830 nm diode laser on the post bond strength. This study analyzed the effect of dentin root canal irradiation with high-intensity diode laser, at 830 nm, operating in continuous or pulsed mode, on the retention of metal or fiber posts, cemented with self-etching resinous composite (Panavia F) and zinc phosphate cement (ZnPO4 )...
May 16, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29736185/evaluation-of-different-restoration-combinations-used-in-the-reattachment-of-fractured-teeth-a-finite-element-analysis
#9
Nagihan Guven, Ozgur Topuz, İhsan Yikilgan
Objective: The purpose of this study was to test different restoration combinations used for constructing fractured endodontically treated incisors by reattaching their fractured fragments. Methods: Seven types of 3-D FEM mathematical root canal-filled models were generated, simulating cases of (OB) reattaching fractured fragments; (CrPL) reattaching fractured fragments + ceramic palatinal laminate; (CmPL) reattaching fractured fragments + composite palatinal laminate; (CM) reattaching fractured fragments + coronal 1/3 of the root was filled using core material; (BP) reattaching fractured fragments + glass fiber post; (CP) composite resin restoration + glass fiber post; and (OC) composite resin restoration...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29728541/assessment-of-fracture-resistance-capacity-of-different-core-materials-with-porcelain-fused-to-metal-crown-an-in-vitro-study
#10
Rajesh Vyas, S R Suchitra, Prafulla T Gaikwad, Vishwanath Gurumurthy, Suraj Arora, Shashit Shetty
Aim: The aim of the study was to evaluate the capacity to resist fracture in different core buildup materials with porcelain fused to metal (PFM) crown. Materials and methods: Totally, 45 mandibular single rooted first premolars were collected, which were sound along with similar shape and size. The teeth were sectioned at 15 mm above the root apex sparing the sound tooth structure. The teeth were endodontically treated with the crown-down technique using nickel-titanium (NiTi) instrumentation. The specimens were randomized into three groups as per the core materials used and were labeled accordingly...
April 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29724156/pulp-regeneration-concepts-for-non-vital-teeth-from-tissue-engineering-to-clinical-approaches
#11
Valérie Orti, Pierre-Yves Collart-Dutilleul, Sofía Silvia Piglionico, Orsolya Pall, Frédéric Cuisinier, Ivan Vladislavov Panayotov
Following the basis of tissue engineering (Cells - Scaffold - Bioactive molecules), regenerative endodontic has emerged as a new concept of dental treatment. Clinical procedures have been proposed by endodontic practitioners willing to promote regenerative therapy. Preserving pulp vitality was a first approach. Later procedures aimed to regenerate a vascularized pulp in necrotic root canals. However, there is still no protocol allowing an effective regeneration of necrotic pulp tissue either in immature or mature teeth...
May 4, 2018: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29709604/ex-vivo-assessment-of-synergic-effect-of-chlorhexidine-for-enhancing-antimicrobial-photodynamic-therapy-efficiency-on-expression-patterns-of-biofilm-associated-genes-of-enterococcus-faecalis
#12
Behnam Bolhari, Maryam Pourhajibagher, Farzaneh Bazarjani, Nasim Chiniforush, Mehdi Rostami Rad, Salma Pirmoazen, Abbas Bahador
BACKGROUND: It has clearly been demonstrated that Enterococcus faecalis, as a persistent microorganism, is the major agent in the etiopatogeny of endodontic infections. Recently, the limitations of conventional endodontic therapy have given rise to many attempts to introduce antimicrobial photodynamic therapy (aPDT) as an alternative treatment. The aim of this study was to analyze the ex vivo effect of aPDT in combination with 2.0% chlorhexidine (CHX) as a conventional therapy on colony count and expression patterns of genes associated with biofilm formation of E...
June 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29703402/fe-analysis-of-conceptual-hybrid-composite-endodontic-post-designs-in-anterior-teeth
#13
Antonio Gloria, Saverio Maietta, Massimo Martorelli, Antonio Lanzotti, David C Watts, Pietro Ausiello
OBJECTIVES: To assess conceptual designs of dental posts consisting of polyetherimide (PEI) reinforced with carbon (C) and glass (G) glass fibers in endodontically treated anterior teeth. METHODS: 3D tessellated CAD and geometric models of endodontically treated anterior teeth were generated from Micro-CT scan images. Model C-G/PEI composite posts with different Young's moduli were analyzed by Finite Element (FE) methods post A (57.7GPa), post B (31.6GPa), post C (from 57...
July 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29692835/the-efficacy-of-metal-artifact-reduction-mode-in-cone-beam-computed-tomography-images-on-diagnostic-accuracy-of-root-fractures-in-teeth-with-intracanal-posts
#14
Zahra Dalili Kajan, Mehran Taramsari, Negar Khosravi Fard, Farnoosh Khaksari, Forough Moghasem Hamidi
Introduction: The purpose of this study was to evaluate the efficacy of cone-beam computed tomography CBCT in the diagnosis of RF in the presence of an intracanal posts with and without applying "metal artifact reduction" (MAR) mode. Methods and Materials: This in vitro study included 60 single-canal endodontically treated premolars. Post spaces were created in all roots. RFs were simulated in 30 of the 60 teeth. Dentatus posts were cemented in 15 of 30 roots with and without RFs...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29684689/is-the-chlorophyll-derivative-zn-ii-e-6-me-a-good-photosensitizer-to-be-used-in-root-canal-disinfection
#15
Patrícia Diogo, Marta Mota, Chantal Fernandes, Diana Sequeira, Paulo Palma, Francisco Caramelo, M Graça P M S Neves, M Amparo F Faustino, Teresa Gonçalves, João Miguel Santos
BACKGROUND: The aim of this study was to assess antimicrobial efficacy and cytotoxic outcomes of a chlorophyll based photosensitizer (PS) Zn(II)chlorin e6 methyl ester (Zn(II)e6 Me), when applied to human dentin discs and root blocks infected with 48 h biofilms. The results were compared with the ones obtained with FotoSan® (commercial Toluidine Blue O formulation) and 3% sodium hypochlorite (NaOCl). METHODOLOGY: Dentin and root blocks were infected with mixed biofilms of Enterococcus faecalis and Candida albicans; exposed for 15 min to 0...
June 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29675119/microscopic-features-of-fractured-fragment-of-nickel-titanium-endodontic-instruments-by-two-different-modes-of-torsional-loading
#16
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
#17
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
#18
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
#19
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
#20
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...
May 2018: Journal of Endodontics
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