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Calcium Hydroxide

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https://www.readbyqxmd.com/read/28644431/an-in-vitro-study-on-the-efficacy-of-removing-calcium-hydroxide-from-curved-root-canal-systems-in-root-canal-therapy
#1
Ying Wang, Li-Yang Guo, Hong-Zhi Fang, Wen-Ling Zou, Ying-Ming Yang, Yuan Gao, Hui Yang, Tao Hu
To compare the efficacy of various irrigants (citric acid, ethylenediaminetetraacetic acid (EDTA) and NaOCl) and techniques in removing Ca(OH)2 in two types of curved root canal systems, simulated root canals with specific curvatures were used to investigate the effects of different irrigants and instruments on Ca(OH)2 removal. The optimal methods were verified on extracted human teeth. Simulated root canals were assigned to one of two groups based on the irrigation solution: 10% citric acid or 2.5% NaOCl. Each group was divided into four subgroups according to the technique used to remove Ca(OH)2...
June 23, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28643935/efficacy-of-self-adjusting-file-xp-endo-finisher-and-passive-ultrasonic-irrigation-on-the-removal-of-calcium-hydroxide-paste-from-an-artificial-standardized-groove
#2
Anda Kfir, Nuphar Blau-Venezia, Tomer Goldberger, Itzhak Abramovitz, Ronald Wigler
The purpose of this study was to compare the effectiveness of self-adjusting file (SAF), XP-endo finisher (XP), passive ultrasonic irrigation (PUI) and conventional syringe and needle irrigation (SNI) in the removal of Ca(OH)2 from an artificial groove. Eighty mandibular incisors with single oval canals were prepared to size 40/0.04 and split longitudinally. A standardised groove was prepared in the apical third and filled with Ca(OH)2 . The root halves were reassembled and divided into two control groups (n = 4) and four experimental groups (n = 18) according to the removal methods used...
June 23, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28639498/municipal-solid-waste-incineration-mswi-fly-ash-washing-pretreatment-by-biochemical-effluent-of-landfill-leachate-a-potential-substitute-for-water
#3
Yunfeng Xu, Yu Fu, Wei Xia, Dan Zhang, Da An, Guangren Qian
Sulfate-rich biochemical effluent of landfill leachate (BEL) resulting from aged refuse bioreactor was employed to wash municipal solid waste incineration (MSWI) fly ash. The dechlorination ability of BEL was found to be nearly equivalent to redistilled water (RW), and concentrations of lead (Pb) and zinc (Zn) in washing solution resulting from BEL washing process were lower than that of RW washing process, Fourier transform infrared (FTIR) analysis indicated that the formation of calcium sulfate and hydroxides in fly ash after BEL washing, and their entrapping function could significantly inhibit the leaching of Pb and Zn...
June 22, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28639437/ultrasound-assisted-green-economic-synthesis-of-hydroxyapatite-nanoparticles-using-eggshell-bio-waste-and-study-of-mechanical-and-biological-properties-for-orthopaedic-applications
#4
Vijay H Ingole, Kamal Hany Hussein, Anil A Kashale, Kalyani Ghule, Tomaž Vuherer, Vanja Kokol, Jia-Yaw Chang, Yong-Chien Ling, Aruna Vinchurkar, Hom N Dhakal, Anil V Ghule
Nanostructured hydroxyapatite (HAp) is most favorable candidate biomaterial for bone tissue engineering because of its bioactive and osteoconductive properties. Herein, we report for the first time ultrasound assisted facile and economic approach for the synthesis of nanocrystalline hydroxyapatite (Ca10 (PO4 )6 (OH)2 ) using recycled eggshell bio-waste referred as EHAp. The process involves the reaction of eggshell bio-waste as a source of calcium and ammonium dihydrogen orthophosphate as a phosphate source...
June 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28638552/efficacy-of-three-methods-for-inserting-calcium-hydroxide-based-paste-in-root-canals
#5
Thales Galvão, Bernardo Camargo, Luciana Armada, Flávio Alves
BACKGROUND: To compare the quality of calcium hydroxide paste fillings performed by three different techniques. MATERIAL AND METHODS: Sixty extracted maxillary central incisors, with previous root canal treatment, were decoronated and the gutta-percha was completely removed from the root canals. Subsequently, the canals were filled with a calcium hydroxide-based paste composed of calcium hydroxide, bismuth carbonate, and glycerin. The study samples were divided into the following three groups on the basis of three insertion techniques (n = 20, each): conventional technique using a hand instrument (MAN), rotary Lentulo spiral (LEN) technique, and a combined technique combining conventional hand files with sonic activation through the EndoActivator device (EA)...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28619613/does-supplemental-photodynamic-therapy-optimize-the-disinfection-of-bacteria-and-endotoxins-in-one-visit-and-two-visit-root-canal-therapy-a-randomized-clinical-trial
#6
Diego G D Rabello, Bruna J M Corazza, Luciana L Ferreira, Mauro P Santamaria, Ana P M Gomes, Frederico C Martinho
AIM: to evaluate the effectiveness of supplemental photodynamic therapy (PDT) in optimizing the removal of bacteria and endotoxins from primarily infected root canals after one-visit and two-visit treatments. METHODOLOGY: Twenty-four primarily infected root canals with apical periodontitis were selected and randomly divided into one-visit (n=12) and two-visit treatment groups (n=12). Chemo-mechanical preparation (CMP) was performed by using the single-file reciprocating technique+2...
June 12, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28612926/the-use-of-silver-amalgam-for-treatment-of-shell-ulcerations-in-turtles-60-cases
#7
F Spadola, M Morici
Shell ulcers were diagnosed based on clinical appearance in 60 turtles. Under general anaesthesia, surgical curettage was performed using a burr mounted on a micro-grinder. A calcium hydroxide paste was applied to the debrided lesions before the application of restorative material. Lesions were completely filled with rapidly hardening silver amalgam. Treated terrapins were hospitalised in dry containers and later were housed in tanks with controlled temperature 24 hours. Fillings were found spontaneously expulsed at various periods after placement...
June 14, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28601441/evaluation-and-handling-of-constipation-in-critical-patients
#8
J Pérez-Sánchez, J Fernández-Boronat, E Martínez-Méndez, M L Marín-Cagigas, D Mota-Puerto, M C Pérez-Román, G Martínez-Estalella
OBJECTIVE: To evaluate the effectiveness of nursing care against constipation and to identify, analyze and evaluate causes and consequences. METHODOLOGY: Observational, descriptive and prospective study in polyvalent ICU tertiary hospital (2013-2015). INCLUSION CRITERIA: >18 years, stay >7 days, connected to respiratory support, with nasogastric tube and enteral or mixed nutrition. Patients with gastrointestinal pathology, encephalopathic and jejunostomy/ileostomy were excluded...
June 7, 2017: Enfermería Intensiva
https://www.readbyqxmd.com/read/28598364/isoprenoids-production-from-lipid-extracted-microalgal-biomass-residues-using-engineered-e-coli
#9
Sumeng Wang, Jianming Yang
Microalgae are recognized as a third generation feedstock for biofuel production due to their rapid growth rates and lignin-free characteristics. In this study, a lipid extracted microalgal biomass residues was used as the raw material to produce isoprene, α-pinene and β-pinene with an engineered E. coli strain. We adopted an optimal sulfuric acid hydrolysis method (1:7 ratio of solid to acid solution, 32% (w/v) concentration of sulfuric acid solution at 90 °C for 90 min) to efficiently convert holocellulose into glucose efficiently (6...
June 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28595806/conversion-of-biowastes-to-biomaterial-an-innovative-waste-management-approach
#10
M Bobby Kannan, Karly Ronan
The study suggests that biowastes (eggshells and urine) can be potentially used as precursors to produce hydroxyapatite (HAp) biomaterial in a simple chemical process. A batch reactor was used in this work to produce HAp powder from eggshells and synthetic urine (SU). Fine powder of calcined eggshells was dissolved in water to produce aqueous calcium hydroxide. The solution was then mixed with concentrated SU in stoichiometric amounts corresponding to HAp (Ca/P molar ratio∼1.67). The initial pH of the solution was alkaline (pH∼8...
June 5, 2017: Waste Management
https://www.readbyqxmd.com/read/28581920/randomized-clinical-trial-to-evaluate-mta-indirect-pulp-capping-in-deep-caries-lesions-after-24-months
#11
U Koc Vural, A Kiremitci, S Gokalp
OBJECTIVE: This clinical study aimed to assess the efficacies of mineral trioxide aggregate (MTA) and calcium hydroxide [Ca(OH)2] in the treatment of deep carious lesions by the direct complete caries removal technique. METHODS AND MATERIALS: A total of 100 permanent molar/premolar teeth were capped with either Ca(OH)2 (n=49) or MTA (n=51) and restored with composite resin in 73 patients. Periapical radiographs were acquired prior to the treatment as well as at six, 12, and 24 months posttreatment...
June 5, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28579569/a-twofold-interpenetrating-three-dimensional-heterometallic-metal-organic-framework-with-pcu-topology-based-on-2-methylbiphenyl-4-4-dicarboxylic-acid
#12
Pei Ying Guo, De Yun Ma, Hai Fu Guo
The 2-methylbiphenyl-4,4'-dicarboxylate (mbpdc(2-)) ligand has versatile coordination modes and can be used to construct multinuclear structures. Despite this, reports of the synthesis of coordination complexes involving this ligand are scarce. The title compound, poly[[triaquadi-μ3-hydroxido-hexakis(μ4-2-methylbiphenyl-4,4'-dicarboxylato)calcium(II)hexazinc(II)] monohydrate], {[CaZn6(C15H10O4)6(OH)2(H2O)3]·H2O}n, has been prepared by the hydrothermal assembly of Zn(NO3)2·6H2O, CaCl2 and 2-methylbiphenyl-4,4'-dicarboxylic acid...
June 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28578886/antibacterial-properties-of-chitosan-nanoparticles-and-propolis-associated-with-calcium-hydroxide-against-single-and-multispecies-biofilms-an-in%C3%A2-vitro-and-in-situ-study
#13
Aldo Del Carpio-Perochena, Anil Kishen, Rafael Felitti, Anjali Y Bhagirath, Manoj R Medapati, Christopher Lai, Rodrigo S Cunha
INTRODUCTION: The aim of this study was to evaluate the efficacy of chitosan nanoparticles (CNPs) and ethanolic propolis extract (EPE) incorporated into a calcium hydroxide paste (Ca[OH]2) to kill bacterial biofilms. METHODS: Human root canal dentin was infected with Enterococcus faecalis for 21 days and also intraorally for 48 hours followed by incubation in brain-heart infusion for 48 hours to standardize biofilm growth. Ca(OH)2 pastes associated or not with CNPs or EPE were tested on biofilms for 7 and 14 days...
June 1, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28567421/effects-of-diode-laser-gaseous-ozone-and-medical-dressings-on-enterococcus-faecalis-biofilms-in-the-root-canal-ex-vivo
#14
Kerstin Bitter, Alexander Vlassakidis, Mediha Niepel, Daniela Hoedke, Julia Schulze, Konrad Neumann, Annette Moter, Jörn Noetzel
The objective was to compare the antibacterial effects of adjunctive disinfection using diode laser and gaseous ozone compared to the medical dressings calcium hydroxide (Ca(OH)2) and chlorhexidine gel (CHX-Gel) on Enterococcus faecalis biofilms in human root canals ex vivo. Root canals of 180 human extracted teeth were infected by E. faecalis and divided into 3 main groups (G): G1, control; G2, instrumentation and irrigation using 0.9% NaCl; G3, instrumentation and irrigation using 1% NaOCl. In each main group, the following treatments were applied: gaseous ozone, diode laser, and medical dressings of Ca(OH)2 or CHX-Gel for 7 days (n = 15)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28567136/pulp-revascularization-a-literature-review
#15
REVIEW
Pollyana Rodrigues de Souza Araújo, Luciano Barreto Silva, Alexandrino Pereira Dos Santos Neto, José Alcides Almeida de Arruda, Pâmella Recco Álvares, Ana Paula Veras Sobral, Severino Alves Júnior, Jair Carneiro Leão, Rodivan Braz da Silva, Gerhilde Callou Sampaio
Reestablishing blood flow and allowing the continuation of root development are some of the objectives of pulp revascularization. This procedure is currently indicated for teeth with incomplete root formation as an alternative to the traditional treatment of apecification, which consists of inserting calcium hydroxide paste into the root canal for a determined time period in order to induce the formation of a calcified barrier. Although it is considered as the most classically employed therapy, the permanence of the paste for long time periods may lead to the weakening of the root due to hygroscopic properties, as well as proteolytic activities of calcium hydroxide...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/28566675/effects-of-calcium-hydroxide-reagent-on-the-bond-strength-of-resin-cements-to-root-dentin-and-the-retention-force-of-frc-posts
#16
Tomoko Someya, Hideaki Kinoshita, Rino Harada, Eiji Kawada, Shinji Takemoto
The aim of this study was to determine the effects of calcium hydroxide (Ca(OH)2) treatment on bond strength of resin cements to root dentin and retention force of fiber-reinforced composite (FRC) posts. Bovine root dentin was endodontically prepared and treated with Ca(OH)2 for 7 days. Root dentin for bond strength test was adhered to resin-composite with resin cements. For pull-out test, posts consisting of FRC posts and resin-composites were fabricated and cemented to root. Shear bond and pull-out tests were performed using a universal testing machine...
May 30, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28561919/current-trends-and-future-perspectives-of-dental-pulp-capping-materials-a-systematic-review
#17
REVIEW
Wellington L O da Rosa, Alexandra R Cocco, Tiago M da Silva, Luana C Mesquita, Arthur Dias Galarça, Adriana F da Silva, Evandro Piva
To systematically review the literature to analyze the current trends and future perspectives of dental pulp capping materials through an analysis of scientific and technological data. This study is reported in accordance with the PRISMA Statement. Nine databases were screened: PubMed (MedLine), Lilacs, IBECS, BBO, Web of Science, Scopus, SciELO, Google Scholar, and The Cochrane Library. Additionally, the following patent applications were searched online in Questel Orbit (Paris, France), USPTO, EPO, JPO, INPI, and Patentscope databases...
May 31, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28552873/the-therapeutic-efficacy-of-allyl-isothiocyanate-in-cows-with-bovine-digital-dermatitis
#18
Kanako Chiba, Tamako Miyazaki, Yasushi Sekiyama, Masao Miyazaki, Keiji Okada
Bovine digital dermatitis (BDD) is the most prevalent infectious cause of lameness in cattle. Because Treponema infection is a major etiology of BDD, the most common treatment of BDD is an antibiotic. Nonetheless, dairy cows require a withdrawal period after antibiotic treatment before their milk can be marketed. To address the problem, in this study, we tested whether 3 nonantibiotic agents (used separately)-allyl isothiocyanate (AITC), sodium alginate, and calcium hydroxide-alleviate BDD lesions in dairy cows...
May 26, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28545965/comparative-evaluation-of-micron-and-nano-sized-intracanal-medicaments-on-penetration-and-fracture-resistance-of-root-dentin-an-in-vitro-study
#19
Abburi Sireesha, R Jayasree, Sampath Vidhya, Sekar Mahalaxmi, V Sujatha, T S Sampath Kumar
Intracanal medicaments play a vital role in disinfection of root canal system. The aim of this study was to evaluate intratubular penetration and fracture resistance of roots filled with micron- and nano-sized intracanal medicaments: calcium hydroxide (CH), nanocalcium hydroxide (NCH), chitosan (CS) and nanochitosan (NCS). Their antibacterial effect on E. faecalis was tested using agar diffusion method. NCH and NCS were prepared by precipitation method and ionic crosslinking respectively. NCH and NCS particles were spherical, with an average particle size of 102±11...
May 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28539937/chlorhexidine-prevents-root-dentine-mineral-loss-and-fracture-caused-by-calcium-hydroxide-over-time
#20
Michael Ranniery Garcia Ribeiro, Érika Bárbara Abreu Fonseca Thomaz, Darlon Martins Lima, Tarcísio Jorge Leitão, José Bauer, Soraia De Fátima Carvalho Souza
Purpose. To evaluate the mineral ion loss of root dentine after treatment with 2% chlorhexidine solution (CHX) and to compare its yield and flexural strength (fs) after exposure to calcium hydroxide [Ca(OH)2]. Materials and Methods. Dentine bars (DB) were made from 90 roots of bovine incisors and randomized into three groups: GControl: distilled/deionized water (DDW), GNaOCl: 2.5% sodium hypochlorite + 17% EDTA, and GCHX: CHX + DDW. The release of phosphate (PO4) and calcium (Ca) ions was measured by spectrophotometry...
2017: International Journal of Dentistry
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