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https://www.readbyqxmd.com/read/28808467/comparison-of-the-penetration-depth-of-conventional-and-nano-particle-calcium-hydroxide-into-dentinal-tubules
#1
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
https://www.readbyqxmd.com/read/28808460/the-effect-of-intracanal-medicaments-on-microleakage-of-mineral-trioxide-aggregate-apical-plugs
#2
Mohammadreza Nabavizadeh, Fariborz Moazzami, Mohsen Bahmani, Hossein Mirhadi
INTRODUCTION: The purpose of this in vitro study was to evaluate the effect of calcium hydroxide, double and triple antibiotic paste on the sealing ability of mineral trioxide aggregate (MTA) apical plugs. METHODS AND MATERIALS: A total of 90 extracted teeth with single canals were prepared and randomly divided into four experimental groups (n=20). Intra-canal medicaments were applied for 3 weeks. MTA was placed through the access opening and condensed to the apical area and then fluid filtration technique was utilized to evaluate sealing ability after 1, 7, 14 and 30 days...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808449/efficacy-of-enamel-matrix-derivative-in-vital-pulp-therapy-a-review-of-literature
#3
REVIEW
Shariq Najeeb, Zohaib Khurshid, Muhammad Sohail Zafar, Sana Zohaib, Fahad Siddiqui
INTRODUCTION: Vital pulp therapy (VPT) aims to preserve the health and maintain life of the tooth pulp which has been compromised by caries, trauma or restorative procedures. Recently, enamel matrix derivative (EMD) has been introduced as a material for vital pulp therapy. The aim of this review is to critically analyze and summarize the available literature on EMD for VPT. METHODS AND MATERIALS: Online databases (PubMED/MEDLINE, Google Scholar, ISI Web of Science, and Wiley-Online) were searched by using the following keywords in various combinations: Enamel Matrix Derivative, Emdogain, 'Vital Pulp Therapy, 'Apexogenisis', Apexification, Pulp Capping, Endodontics, Dentine and Pulpotomy for studies indexed from January 1949 to April 2016...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28804934/complicated-untreated-apical-periodontitis-causing-paraesthesia-a-case-report
#4
Domenico Ricucci, Simona Loghin, José F Siqueira
The purpose of this article was to report a case of untreated apical periodontitis resulting in severe late complications. A patient with an asymptomatic crowned root canal-treated mandibular molar revealing a radiographic substandard endodontic treatment and a slight periapical radiolucency was made aware of the treatment options and opted for no treatment. The lesion slightly increased in size after 6 years, but the tooth remained asymptomatic and endodontic retreatment was again refused. After 4 more years, the patient presented with an abscess and severe pain, complicated by paraesthesia of the left chin and lip...
August 14, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28802096/comparison-of-cleaning-methods-for-delicate-insect-specimens-for-scanning-electron-microscopy
#5
Katharina Schneeberg, René Bauernfeind, Hans Pohl
The objective of the present study was to compare cleaning methods for delicate insect specimens for investigations with scanning electron microscopy (SEM). As typical specimens we used aquatic larvae of mosquitoes, springtails, larvae of mayflies and caterpillars because they are very fragile and large parts of their body consist of soft tissue. Additionally their cuticle is very often covered with dirt, soil particles or other materials. Cleaning with ultrasonic sound, as the most common cleaning method used for SEM, will destroy fragile insects...
August 12, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28778053/release-behavior-and-signaling-effect-of-vitamin-d3-in-layered-double-hydroxides-hydroxyapatite-gelatin-bone-tissue-engineering-scaffold-an-in-vitro-evaluation
#6
Fateme Fayyazbakhsh, Mehran Solati-Hashjin, Abbas Keshtkar, Mohammad Ali Shokrgozar, Mohammad Mehdi Dehghan, Bagher Larijani
Incorporating the controlled release of vitamin D3 (VD3) into biodegradable porous scaffolds is a new approach to equipping multifunctional therapeutics for osteoporosis. The current investigation involves the encapsulation of VD3 into gelatin through the one-step desolvation method. The layered double hydroxides-hydroxyapatite nanocomposite (LDH-HAp) and pure LDH were combined with the gelatin-VD3 complex to reinforce the porous biodegradable structure and enhance the biological response. Afterwards, glutaraldehyde was used to form crosslinks within the gelatin chains...
July 3, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28774054/studying-the-hydration-of-a-retarded-suspension-of-ground-granulated-blast-furnace-slag-after-reactivation
#7
Nick Schneider, Dietmar Stephan
This article presents a combined use of a retarder (d-gluconic acid) and an alkaline activator (sodium hydroxide) in a binder system based on ground granulated blast-furnace slag. The properties of the retarder are extending the dormant hydration period and suppressing the generation of strength-giving phases. Different retarder concentrations between 0.25 and 1.00 wt.% regulate the intensity and the period of the retardation and also the characteristics of the strength development. The activator concentration of 30 and 50 wt...
November 18, 2016: Materials
https://www.readbyqxmd.com/read/28773861/experimental-study-on-full-scale-beams-made-by-reinforced-alkali-activated-concrete-undergoing-flexure
#8
Linda Monfardini, Fausto Minelli
Alkali Activated Concrete (AAC) is an alternative kind of concrete that uses fly ash as a total replacement of Portland cement. Fly ash combined with alkaline solution and cured at high temperature reacts to form a binder. Four point bending tests on two full scale beams made with AAC are described in this paper. Companion small material specimens were also casted with the aim of properly characterizing this new tailored material. The beam's length was 5000 mm and the cross section was 200 mm × 300 mm. The AAC consisted of fly ash, water, sand 0-4 mm and coarse aggregate 6-10 mm; and the alkaline solution consisted of sodium hydroxide mixed with sodium silicate...
August 30, 2016: Materials
https://www.readbyqxmd.com/read/28773854/sem-analysis-of-the-interfacial-transition-zone-between-cement-glass-powder-paste-and-aggregate-of-mortar-under-microwave-curing
#9
Yaning Kong, Peiming Wang, Shuhua Liu, Guorong Zhao, Yu Peng
In order to investigate the effects of microwave curing on the microstructure of the interfacial transition zone of mortar prepared with a composite binder containing glass powder and to explain the mechanism of microwave curing on the improvement of compressive strength, in this study, the compressive strength of mortar under microwave curing was compared against mortar cured using (a) normal curing at 20 ± 1 °C with relative humidity (RH) > 90%; (b) steam curing at 40 °C for 10 h; and (c) steam curing at 80 °C for 4 h...
August 27, 2016: Materials
https://www.readbyqxmd.com/read/28773793/studies-on-the-alkali-silica-reaction-rim-in-a-simplified-calcium-alkali-silicate-system
#10
Kunpeng Zheng, Peter Adriaensens, Geert De Schutter, Guang Ye, Luc Taerwe
This work is intended to provide a better understanding about the properties and roles of the reaction rim in an alkali-silica reaction. A simplified calcium-alkali-silicate system was created to simulate the multiple interactions among reactive silica, alkaline solution and portlandite near the aggregate surface during the formation and evolution of the reaction rim in an alkali-silica reaction. A transport barrier preventing the migration of calcium and silicate through itself was found on the interface between the alkali silicate and the calcium hydroxide...
August 9, 2016: Materials
https://www.readbyqxmd.com/read/28773217/biosorbents-for-removing-hazardous-metals-and-metalloids
#11
REVIEW
Katsutoshi Inoue, Durga Parajuli, Kedar Nath Ghimire, Biplob Kumar Biswas, Hidetaka Kawakita, Tatsuya Oshima, Keisuke Ohto
Biosorbents for remediating aquatic environmental media polluted with hazardous heavy metals and metalloids such as Pb(II), Cr(VI), Sb(III and V), and As(III and V) were prepared from lignin waste, orange and apple juice residues, seaweed and persimmon and grape wastes using simple and cheap methods. A lignophenol gel such as lignocatechol gel was prepared by immobilizing the catechol functional groups onto lignin from sawdust, while lignosulfonate gel was prepared directly from waste liquor generated during pulp production...
July 26, 2017: Materials
https://www.readbyqxmd.com/read/28765825/comparison-of-the-effect-of-prp-prf-and-induced-bleeding-in-the-revascularization-of-teeth-with-necrotic-pulp-and-open-apex-a-triple-blind-randomized-clinical-trial
#12
Vasundara Yayathi Shivashankar, Dexton Antony Johns, Ramesh Kumar Maroli, Mahalaxmi Sekar, Rathinavel Chandrasekaran, Shanmugavel Karthikeyan, Senthil Kumar Renganathan
INTRODUCTION: Treatment of a tooth with necrotic pulp and open apex is a special challenge to the clinicians. Apexification with calcium hydroxide and MTA barrier technique fails to induce continued root maturation which makes the tooth susceptible to root fracture. Hence, an ideal outcome for such a tooth should be regeneration of pulp like tissue into the root canal capable of continuing normal root maturation. AIM: This study aims to compare the effect of Platelet Rich Fibrin (PRF), induced bleeding technique and Platelet Rich Plasma (PRP) in the revascularization of tooth with necrotic pulp and open apex...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28764283/fabrication-and-appraisal-of-poly-lactic-co-glycolic-acid-moxifloxacin-nanoparticles-using-vitamin-e-tpgs-a-potential-intracanal-drug-delivery-agent
#13
Hardik Makkar, Gaurav Patri
INTRODUCTION: Nanotechnology is gaining momentum in the search for ideal biomaterials by dental researchers. The expansible nature of Endodontology deems exploration, learning and scrutinizing newer avenues which have the potential to be applied and investigated. The popularity of polymers as drug delivery vehicles has opened avenues for their application in the root canal system. This study utilized application of biodegradable polymers as potential drug delivery vehicles against Enterococcus faecalis, one of the main reasons for post treatment disease...
June 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28762655/knowledge-and-practice-of-and-attitudes-toward-pulp-therapy-in-deciduous-teeth-among-pediatric-dentists-in-india
#14
Ullal A Nayak, Saakshe Wadhwa, Nilotpol Kashyap, Deepesh Prajapati, Amit V Mahuli, Reena Sharma
AIM: The aim of the present study was to assess the knowledge and practice of, and attitudes toward, pulp therapy in deciduous dentition among pediatric dentists. METHODS: A cross-sectional, observational survey was conducted using a closed-ended, multiple-choice questionnaire evaluating the knowledge and practice of, and attitudes toward, pulp therapy in deciduous dentition, which was formulated and sent to 360 pediatric dentists across India. Descriptive statistics were done, followed by χ(2) -test to test the association between years of experience and the questionnaire items...
August 1, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28761835/evaluation-of-vitamin-d3-and-d2-stability-in-fortified-flat-bread-samples-during-dough-fermentation-baking-and-storage
#15
Mehrnaz Tabibian, Mohammadali Torbati, Mohammad Reza Afshar Mogaddam, Maryam Mirlohi, Malihe Sadeghi, Javad Mohtadinia
Purpose: Vitamin D, a fat-soluble secosteroid, has a significant role in bone metabolism and helps calcium absorption in the body. Since vitamin D concentration is altered in fortified foods and dietary supplements, the actual amount of vitamin D may differ from the label value. Methods: In this study, the concentrations of vitamin D2 and D3 of fortified bread sample were analytically determined. For this purpose, dough or homogenized bread sample was saponified using potassium hydroxide solution (30%, w/v) at 80°C, and the saponified analytes were extracted into n-heptane followed by liquid-liquid extraction...
June 2017: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28761378/calcium-hydroxide-liners-a-literature-review
#16
REVIEW
Naji Ziad Arandi
OBJECTIVE: This review integrates the literature on cavity liners and current concepts of pulp protection with the aim of establishing a better understanding of the role of calcium hydroxide as a cavity liner. MATERIALS AND METHODS: A search was conducted through PubMed, MEDLINE, and Ovid for articles with the criteria for the following terms: cavity liners and bases, pulp protection, and calcium hydroxide liners. No specific inclusion or exclusion criteria were applied as to what articles would be included in this review...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28761256/root-canal-treatment-of-a-fused-mandibular-incisor-using-cone-beam-computed-tomography-as-a-diagnostic-aid
#17
Maura Cristiane Orçati Dorielo, Alcides Gonini-Junior, Durvalino de Oliveira, Renata Tarnoschi Bordignon, Alvaro Henrique Borges
Tooth fusion consists of the union of crowns by the enamel and/or dentin. We describe a case of a patient who presented with a fistula in the apical portion of teeth 32 and 33. Clinically, tooth 32 showed increased crown width in relation to other teeth in the same arch. Radiographic examination evidenced fusion of tooth 32 with a possible supernumerary tooth. Cone-beam computed tomography was used to confirm the radiographic findings and revealed incomplete apex formation of the supernumerary tooth. The fused tooth was subjected to root canal treatment...
January 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28761249/retrievability-of-calcium-hydroxide-intracanal-medicament-with-three-calcium-chelators-ethylenediaminetetraacetic-acid-citric-acid-and-chitosan-from-root-canals-an-in-vitro-cone-beam-computed-tomography-volumetric-analysis
#18
Ramya Raghu, Geethu Pradeep, Ashish Shetty, P M Gautham, P G Puneetha, T V Satyanarayana Reddy
AIM: This study compared the amount of aqueous-based and oil-based calcium hydroxide remaining in the canal, after removal with two different chelators 17% EDTA, 20% Citric acid and 0.2% Chitosan in combination with ultrasonic agitation. METHODS AND MATERIAL: Cleaning and shaping of root canals of 28 mandibular premolar was done and canals were filled either with Metapex or Ca(OH)2 mixed with distilled water. Volumetric analysis was performed utilizing cone beam-computed tomography (CBCT) after seven days of incubation...
January 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28761245/comparison-of-efficiency-of-ethylenediaminetetraacetic-acid-citric-acid-and-etidronate-in-the-removal-of-calcium-hydroxide-intracanal-medicament-using-scanning-electron-microscopic-analysis-an-in-vitro-study
#19
Sherin Jose Chockattu, B S Deepak, K Mallikarjun Goud
CONTEXT: Being integral to root canal therapy, obturation can be performed adequately only after the removal of intracanal medicament. One technique involves the use of chelating agents such as ethylenediaminetetraacetic acid (EDTA) and citric acid. Etidronic acid, a relatively new chelator, has smear layer removal ability and lesser dentinal erosion. It is untested in calcium hydroxide (Ca[OH]2) medicament removal. AIM: The aim of this study was to compare the efficiency of irrigation protocols (EDTA, citric acid, and etidronate) in Ca(OH)2 removal...
January 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/28755596/mechanisms-of-enhanced-inorganic-phosphorus-accumulation-by-periphyton-in-paddy-fields-as-affected-by-calcium-and-ferrous-ions
#20
Jiu-Yu Li, Kai-Ying Deng, Dean Hesterberg, Yong-Qiu Xia, Chen-Xi Wu, Ren-Kou Xu
The effect of periphyton propagation in paddy fields on phosphorus biogeochemical cycling has received little attention. In this phytotron study, inorganic phosphorus (Pi) accumulation by periphyton was investigated for varying inputs of calcium [Ca(II)] or ferrous‑iron [Fe(II)], and lighting conditions. Results indicated that additions of Ca(II) or Fe(II) enhanced abiotic accumulation of Pi by up to 16 times, and decreased solution Pi concentration by up to 50%, especially under light condition. The enhanced Pi accumulation into periphyton intensified with increasing Pi concentration, and Pi accumulation showed a positive linear relationship with Ca or Fe accumulation...
July 26, 2017: Science of the Total Environment
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