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https://www.readbyqxmd.com/read/28937906/protein-activation-in-periapical-reaction-to-iodoform-containing-root-canal-sealer
#1
Nili Tickotsky, Moti Moskovitz
OBJECTIVES: An association between root canal sealers and periapical lesions in primary dentition has been suggested, yet the chemical-protein interactions that may be involved in it have not been studied. The present study explored root sealer components' effect on periapical tissue proteins using bioinformatics tools. STUDY DESIGN: For each chemical component of Endoflas F.S. root sealing material we identified the known and predicted target proteins, using STITCH (search tool for interactions of chemicals http://stitch...
September 22, 2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28937899/microbiological-evaluation-of-ozone-on-dentinal-lesions-in-young-permanent-molars-using-the-stepwise-excavation
#2
Osama Safwat, Mona Elkateb, Karin Dowidar, Hala Abdel Salam, Omar El Meligy
AIM: To assess the microbial effect of ozone gas on dentinal lesions in young permanent molars using the stepwise excavation. STUDY DESIGN: An experimental, controlled clinical trial was performed. The sample included 80 immature first permanent molars, showing deep occlusal carious cavities that were indicated for stepwise excavation. Following first step of dentin excavation, the sample was divided into test (ozone gas) and control (calcium hydroxide (Ca(OH)2) base material) groups...
September 22, 2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28937889/clinical-evaluation-of-ozone-on-dentinal-lesions-in-young-permanent-molars-using-the-stepwise-excavation
#3
Osama Safwat, Mona Elkateb, Karin Dowidar, Omar El Meligy
AIM: To evaluate the clinical changes in dentin of deep carious lesions in young permanent molars, following ozone application with and without the use of a remineralizing solution, using the stepwise excavation. STUDY DESIGN: The sample included 162 first permanent immature molars, showing deep occlusal carious cavities that were indicated for indirect pulp capping. Teeth were divided into 2 main groups according to the method of ozone treatment. Each group was further subdivided equally into test and control subgroups...
September 22, 2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28917876/preparation-of-chitosan-hydroxyapatite-composite-mono-fiber-using-coagulation-method-and-their-mechanical-properties
#4
Takuma Okada, Yuta Nobunaga, Toshiisa Konishi, Tomohiko Yoshioka, Satoshi Hayakawa, Maria Ascensão Lopes, Toshiki Miyazaki, Yuki Shirosaki
Autograft has been carried out for anterior cruciate ligament (ACL) reconstruction surgery. However, it has negative aspect because patients lose their healthy ligaments from other part. We focus on a chitosan-hydroxyapatite (HAp) composite fiber as a scaffold of ligament regeneration. Chitosan- HAp composite fiber was made by using coagulation method. Chitosan-NaH2PO4 solution was coagulated with coagulation bath including calcium ion to get the mono-fiber and then treated with sodium hydroxide solution to form HAp in fiber matrix...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917577/direct-pulp-capping-with-calcium-hydroxide-mineral-trioxide-aggregate-and-biodentine-in%C3%A2-permanent-young-teeth-with-caries-a%C3%A2-randomized-clinical-trial
#5
Claudia Brizuela, Andrea Ormeño, Carolina Cabrera, Roxana Cabezas, Carolina Inostroza Silva, Valeria Ramírez, Montse Mercade
INTRODUCTION: Direct pulp capping treatment is intended to preserve pulp vitality, to avoid or retard root canal treatment, and, in cases with an open apex, to allow continued root development. Historically, calcium hydroxide (CH) was the gold standard material, but nowadays calcium silicate materials (CSMs) are displacing CH because of their high bioactivity, biocompatibility, sealing ability, and mechanical properties. However, more randomized clinical trials are needed to confirm the appropriateness of CSMs as replacement materials for CH in direct pulp capping procedures...
September 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28916389/removal-and-killing-of-multispecies-endodontic-biofilms-by-n-acetylcysteine
#6
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/28914253/mineral-trioxide-aggregate-induced-apical-closure-in-nonvital-immature-permanent-maxillary-incisor
#7
Meenu Bhola, Virinder Goyal, Parimala Tyagi, Tarun Kumar
Treatment of nonvital immature permanent teeth with calcium hydroxide is associated with few difficulties such as weakened tooth root, root canal reinfection, and long treatment time. Mineral trioxide aggregate (MTA) apical plug method is an alternative treatment method for open apices and has gained popularity in the recent times. This case report describes the management of a late-referral case of periapically involved, traumatized immature permanent incisor by endodontic treatment and the use of MTA apical plug...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28911269/applicability-of-two-dimensional-surface-model-in-bacterial-biosorption-system-an-advanced-approach-in-bioremediation-of-metal-ions
#8
Vishal Mishra
The surface of Bacillus VMSDCM accession no. HQ108109 has been characterized at various pH values of the experimental solution. The boundary values of conditional parameter were used to develop a mathematical six lumped stochastic model for studying the surface chemistry of the bacterium cells. The results of the model were statistically analyzed to understand the strength of the proposed model. The simulation of the model was performed in Turbo C++ interface. The convergence values of the model were recorded and all the asymptotic points were neglected...
September 15, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28872838/electrochemical-induced-calcium-phosphate-precipitation-importance-of-local-ph
#9
Yang Lei, Bingnan Song, Renata D van der Weijden, Michel Saakes, Cees J N Buisman
Phosphorus (P) is an essential nutrient for living organisms and cannot be replaced or substituted. In this paper, we present a simple yet efficient membrane free electrochemical system for P removal and recovery as calcium phosphate (CaP). This method relies on in situ formation of hydroxide ions by electro mediated water reduction at a titanium cathode surface. The in situ raised pH at the cathode provides a local environment where CaP will become highly supersaturated. Therefore, homogeneous and heterogeneous nucleation of CaP occurs near and at the cathode surface...
September 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28869680/structural-analysis-of-uranyl-complexation-by-the-ef-hand-motif-of-calmodulin-effect-of-phosphorylation
#10
Catherine Berthomieu, Sandrine Sauge-Merle, Florian Brulfert, Romain Pardoux, Pier Lorenzo Solari, David Lemaire, Samir Safi, Philippe Guilbaud, Eric Simoni, Mohamed Larbi Merroun
Better understanding of uranyl-protein interactions is a prerequisite to predict uranium chemical toxicity in cells. The EF-hand motif of calmodulin site I is about thousand times more affine for uranyl than for calcium, and threonine phosphorylation increases uranyl affinity by two orders of magnitude at pH 7. In this study, we confront X-rays absorption spectroscopy with Fourier transform infrared (FTIR), time resolved laser-induced fluorescence spectroscopy (TRLFS) and structural models obtained by molecular dynamics simulations to analyze uranyl coordination in native and phosphorylated calmodulin site I...
September 4, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28867429/comparison-of-sodium-hydroxide-and-calcium-hydroxide-pretreatments-of-giant-reed-for-enhanced-enzymatic-digestibility-and-methane-production
#11
Danping Jiang, Xumeng Ge, Quanguo Zhang, Xuehua Zhou, Zhou Chen, Harold Keener, Yebo Li
NaOH pretreatment with leachate reuse and Ca(OH)2 pretreatment were compared for improved enzymatic digestibility and biogas production from giant reed, a promising energy crop. The NaOH pretreatment with leachate reuse increased glucose yields during enzymatic hydrolysis by 2.6-fold, and methane yields during anaerobic digestion by 1.4- to 1.6-fold. However, NaOH pretreatment had a negative net benefit (i.e., revenue from increased energy production minus chemical cost). Pretreatment with 7-20% Ca(OH)2 not only improved glucose yield and methane yield by up to 2...
November 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28857353/crystalline-phases-involved-in-the-hydration-of-calcium-silicate-based-cements-semi-quantitative-rietveld-x-ray-diffraction-analysis
#12
Renata Grazziotin-Soares, Mohammad H Nekoofar, Thomas Davies, Roberto Hübler, Naghmeh Meraji, Paul M H Dummer
Chemical comparisons of powder and hydrated forms of calcium silicate cements (CSCs) and calculation of alterations in tricalcium silicate (Ca3 SiO5 ) calcium hydroxide (Ca(OH)2 ) are essential for understanding their hydration processes. This study aimed to evaluate and compare these changes in ProRoot MTA, Biodentine and CEM cement. Powder and hydrated forms of tooth coloured ProRoot MTA, Biodentine and CEM cement were subjected to X-ray diffraction (XRD) analysis with Rietveld refinement to semi-quantitatively identify and quantify the main phases involved in their hydration process...
August 30, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28855762/a-comparison-of-human-dental-pulp-response-to-calcium-hydroxide-and-biodentine-as-direct-pulp-capping-agents
#13
Anushka Lalit Jalan, Manjusha M Warhadpande, Darshan M Dakshindas
CONTEXT: Direct pulp capping involves the placement of a biocompatible agent on pulp tissue that has been inadvertently exposed from traumatic injury or by iatrogenic means. AIM: To compare the human pulp response to calcium hydroxide and Biodentine as direct pulp-capping agents. MATERIALS AND METHODS: Pulp exposures were performed on the pulpal floor of forty human permanent premolars. The exposure sites were dressed with either Dycal or Biodentine as pulp-capping materials...
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/28844307/clinical-evidence-for-regenerative-endodontic-procedures-immediate-versus-delayed-induction
#15
Tatiana M Botero, Xianli Tang, Richard Gardner, Jan C C Hu, James R Boynton, G Rex Holland
Clinicians face many challenges when treating immature permanent teeth in young patients. Immediate blood clot induction can be a successful option as described by some case reports. No experimental studies or clinical trials have addressed this question. We have designed a clinical trial in which we hypothesized that there is no difference in success between immediate or delayed induction protocols. After confirmation of pulpal necrosis, patients were randomized. In the delayed group, 15 teeth were treated following the American Association of Endodontists guidelines, and calcium hydroxide was used as the intracanal medication...
September 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28831619/important-role-of-calcium-chloride-in-preventing-carbon-monoxide-generation-during-desflurane-degradation-with-alkali-hydroxide-free-carbon-dioxide-absorbents
#16
Takahiro Ando, Atsushi Mori, Rie Ito, Kimitoshi Nishiwaki
We investigated whether calcium chloride (CaCl2), a supplementary additive in carbon dioxide (CO2) absorbents, could affect carbon monoxide (CO) production caused by desflurane degradation, using a Japanese alkali-free CO2 absorbent Yabashi Lime(®)-f (YL-f), its CaCl2-free and 1% CaCl2-added derivatives, and other commercially available alkali-free absorbents with or without CaCl2. The reaction between 1 L of desflurane gas (3-10%) and 20 g of desiccated specimen was performed in an artificial closed-circuit anesthesia system for 3 min at 20 or 40 °C...
August 22, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28828150/the-xp-endo-finisher-for-the-removal-of-calcium-hydroxide-paste-from-root-canals-and-from-the-apical-third
#17
Rami Hamdan, Jérôme Michetti, Déborah Pinchon, Franck Diemer, Marie Georgelin-Gurgel
BACKGROUND: The aim was to compare the efficacy of the passive ultrasonic irrigation PUI and the Xp-endo Finisher (FKG-Dentaire, La-Chaux-de-Fonds, Switzerland) in removing the calcium hydroxide paste from root canals and from the apical third. MATERIAL AND METHODS: Sixty-eight root canals of single-rooted teeth were shaped using the BT-Race files (FKG-Dentaire, La-Chaux-de-Fonds, Switzerland). Ca(OH)2 was placed in all samples except for the negative control group (n=4)...
July 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28828148/spectrophotometric-analysis-of-crown-discoloration-following-the-use-of-silver-nanoparticles-combined-with-calcium-hydroxide-as-intracanal-medicament
#18
Farzaneh Afkhami, Sadaf Elahy, Alireza Mahmoudi-Nahavandi
BACKGROUND: Optimal antibacterial efficacy of intracanal medicaments containing silver nanoparticles (Ag-NPs) has been well documented. However, concerns remain regarding the effect of Ag-NPs on tooth color. This study aimed to assess the effects of calcium hydroxide (CH) mixed with Ag-NPs as intracanal medicaments on tooth color. The effect of location of application of medicament on the degree of discoloration was evaluated as well. MATERIAL AND METHODS: Fifty extracted single-rooted, single-canal human teeth with straight roots, no caries, no cracks or fractures were collected and accessed...
July 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28827848/biocompatibility-evaluation-of-four-dentin-adhesives-used-as-indirect-pulp-capping-materials
#19
Olga Cortés, Antonia Alcaina, Antonia Bernabé
BACKGROUND: In many cases, the indirect pulp treatment (IPT) is an acceptable treatment for deciduous teeth with reversible pulp inflammation. Various medicaments have been used for IPT, ranging from calcium hydroxide and glass ionomers to dentin adhesives. OBJECTIVE: This in vitro trial aimed to measure cytotoxicity in a cell culture, comparing the following four adhesives: Xeno® V (XE), Excite® F DSC (EX), Adhese® OneF (AD) and Prime & Bond NT (PB). MATERIALS AND METHODS: The adhesives were prepared according to the manufacturer's instructions...
June 2017: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/28808467/comparison-of-the-penetration-depth-of-conventional-and-nano-particle-calcium-hydroxide-into-dentinal-tubules
#20
Vahid Zand, Hadi Mokhtari, Aila Hasani, Golchin Jabbari
INTRODUCTION: The aim of this in vitro study was to evaluate and compare the penetration depth of conventional (CH) and nano-particle calcium hydroxide (NCH) into dentinal tubules. METHODS AND MATERIALS: Ninety human single-rooted teeth were instrumented by RaCe rotary system and after chemomechanical preparation were randomly divided in two equal groups (n=45). In the first group conventional CH and in the other NCH was used as intracanal medicament. After 2 weeks of incubation all roots were intentionally split at longitudinal axis and prepared for scanning electron microscope (SEM) observation...
2017: Iranian Endodontic Journal
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