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Calcium Hydroxide

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https://www.readbyqxmd.com/read/28198096/treated-dentin-matrix-paste-as-a-novel-pulp-capping-agent-for-dentin-regeneration
#1
Jinlong Chen, Caiyun Cui, Xiangchen Qiao, Bo Yang, Mei Yu, Weihua Guo, Weidong Tian
Regenerating dentin and preserving pulp vitality are the two key targets for the treatment of dental pulp exposure. Calcium hydroxide (CH), the widely used capping agent, may induce potential tunnel defect in reparative dentin and cause inflammation or even necrosis in pulp tissues. This study aimed to produce a novel pulp capping agent with better bioactivities. Treated dentin matrix (TDM) paste (TDMP) was fabricated consisting of TDM powder and aqueous TDM extract. The chemical and biological characteristics of TDMP were investigated, and its effect on the odontogenic differentiation of dental pulp stem cells explored at gene and protein level; the therapeutic effect for pulp exposure in miniature swine was further verified...
February 15, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28195270/fracture-resistance-and-cusp-deflection-of-lined-or-non-lined-composite-and-glass-hybrid-restorations-over-residual-demineralized-dentin
#2
Michael Sawalt, Sebastian Paris, Uwe Blunck, Falk Schwendicke
PURPOSE: To assess the fracture resistance (FR) and cusp deflection (CD) of lined or non-lined composite (CO) and glass hybrid (GH) restorations over residual demineralized dentin. MATERIALS AND METHODS: In 48 extracted human premolars, artificial residual demineralized dentin was induced on pulpo-axial walls of standardized cavities. Various restorations were placed over this demineralized dentin: an experimental GH, a composite restoration (OptiBond FL+Tetric EvoCeram) without lining, or composite restorations with non-setting (Hypocal) or setting (Dycal) calcium hydroxide lining...
February 10, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28190802/alternate-spray-coating-for-the-direct-fabrication-of-hydroxyapatite-films-without-crystal-growth-step-in-solution
#3
Satoshi Watanabe, Rei Kashiwagi, Mutsuyoshi Matsumoto
We discuss an alternate spray-coating technique for the direct fabrication of hydroxyapatite films using metal masks, suction-type spray nozzles and two calcification solutions of calcium hydroxide and phosphoric acid aqueous solutions. Hydroxyapatite films were formed only on the hydrophobic surface of the substrates. Scanning electron microscopy and energy dispersive X-ray spectroscopy showed that the spray-coated films consisted of hydroxyapatite nanoparticles. The Ca/P ratio was estimated to be about 1...
February 10, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28169260/evaluation-of-indirect-pulp-capping-using-three-different-materials-a-randomized-control-trial-using-cone-beam-computed-tomography
#4
Vijay Prakash Mathur, Jatinder Kaur Dhillon, Ajay Logani, Gauri Kalra
OBJECTIVE: The objective of this study was to determine the most suitable material for indirect pulp treatment (IPT) clinically and to determine the thickness (in mm) and type of tissue in terms of radiodensity (in Hounsfield units [HU]) formed after pulp capping using cone-beam computed tomography (CBCT) scan. MATERIALS AND METHODS: A longitudinal interventional single-blind randomized clinical trial was conducted on 94 children (7-12 years) with a deep carious lesion in one or more primary second molar and permanent first molar without the history of spontaneous pain indicated for indirect pulp capping (IPC) procedure...
November 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28162017/postoperative-pain-after-the-removal-of-root-canal-filling-material-using-different-techniques-in-teeth-with-failed-root-canal-therapy-a-randomized-clinical-trial
#5
Hüseyin Sinan Topçuoğlu, Gamze Topçuoğlu
OBJECTIVES: This study evaluated the intensity and duration of postoperative pain after the removal of root canal filling material in retreatment procedures of upper incisor teeth with chronic apical periodontitis, using different techniques. MATERIALS AND METHODS: One hundred and thirty-five patients requiring retreatment of upper incisor teeth with chronic apical periodontitis were included in the study. The patients were assigned to three groups of 45 patients, according to the method used to remove old canal filling material...
February 5, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28157816/synthesis-and-characterization-of-%C3%AE-tricalcium-phosphate-derived-from-haliotis-sp-shells
#6
Kyeong-Rok Kang, Zheng-Gang Piao, Jae-Sung Kim, In-A Cho, Min-Ji Yim, Bok-Hee Kim, Ji-Su Oh, Jun Sik Son, Chun Sung Kim, Do Kyung Kim, Sook-Young Lee, Su-Gwan Kim
PURPOSE: To develop a methodology for the synthesis of β-tricalcium phosphate (β-TCP, Ca3(PO4)2) from the shell of Haliotis sp. (abalone shell) and to verify its characterization and biocompatibility. MATERIALS AND METHODS: Calcium oxide (CaO) was synthesized from abalone shell by sintering and was suspended in distilled water to prepare calcium hydroxide (Ca(OH)2). For the synthesis of calcium carbonate (CaCO3), carbon dioxide was used to infuse Ca(OH)2 at pH 7...
February 2, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28153426/factors-affecting-gastrointestinal-absorption-of-levothyroxine-a-review
#7
REVIEW
Marko Skelin, Tomo Lucijanić, Daniela Amidžić Klarić, Arnes Rešić, Miro Bakula, Ana-Marija Liberati-Čizmek, Hossein Gharib, Dario Rahelić
PURPOSE: Levothyroxine (LT4) is a drug with a narrow therapeutic index, applied in small amounts (micrograms), which makes interactions in the absorption phase clinically significant. The main aim of this article was to review and present the latest information on factors that affect the gastrointestinal absorption of this drug. METHODS: Relevant data were collected by using the MEDLINE, PubMed, EMBASE, Web of Science, Science Direct, and Scopus databases with the key words levothyroxine and absorption...
January 30, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28144942/assessment-of-the-effects-exerted-by-acid-and-alkaline-solutions-on-bone-is-chemistry-the-answer
#8
Alberto Amadasi, Arianna Camici, Davide Porta, Lucia Cucca, Daniele Merli, Chiara Milanese, Antonella Profumo, Nabila Rassifi, Cristina Cattaneo
The treatment of corpses with extremely acid or basic liquids is sometimes performed in criminal contexts. A thorough characterization by chemical analysis may provide further help to macroscopic and microscopic analysis; 63 porcine bone samples were treated with solutions at different pH (1-14) for immersion periods up to 70 days, as well as in extremely acidic sulfuric acid solutions (9 M/18 M) and extremely basic sodium hydroxide. Inductively coupled optical emission spectrometry (ICP-OES)/plasma mass spectrometry (ICP-MS), Fourier transform infrared spectroscopy (FT-IR), energy dispersive X-ray analysis (EDX), X-ray powder diffraction (XRPD), and scanning electron microscopy (SEM) showed that only the sulfuric acid solution 18 M was able to completely dissolve the sample...
February 1, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28131413/effect-of-a-low-surface-tension-vehicle-on-the-dentinal-tubule-penetration-of-calcium-hydroxide-and-triple-antibiotic-paste
#9
Derya Deniz Sungur, Hacer Aksel, Nuhan Purali
INTRODUCTION: The purpose of this study was to evaluate dentinal tubule penetration (DTP) of calcium hydroxide (CH) and triple antibiotic paste (TAP) when performed with distilled water (DW) or a low surface tension liquid (ie, propylene glycol [PG]). METHODS: Root apices of 40 single-rooted premolars were removed to obtain 14-mm roots in length. Root canals were enlarged to simulate immature teeth. After smear layer removal, the roots were randomly divided into 4 groups (n = 10) according to the root canal medicaments and the vehicles used: group 1:TAP + DW, group 2: TAP + PG, group 3: CH + DW, and group 4:CH + PG...
January 25, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28128328/antimicrobial-activity-of-proroot-mta-in-contact-with-blood
#10
C Farrugia, P Baca, J Camilleri, M T Arias Moliz
Dental materials based on Portland cement, which is used in the construction industry have gained popularity for clinical use due to their hydraulic properties, the interaction with tooth tissue and their antimicrobial properties. The antimicrobial properties are optimal in vitro. However in clinical use contact with blood may affect the antimicrobial properties. This study aims to assess whether antimicrobial properties of the Portland cement-based dental cements such as mineral trioxide aggregate (MTA) are also affected by contact with blood present in clinical situations...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28076462/effect-of-ultrasonic-streaming-on-intra-dentinal-disinfection-and-penetration-of-calcium-hydroxide-paste-in-endodontic-treatment
#11
Marcela Paola Castro Arias, Amanda Garcia Alves Maliza, Raquel Zanin Midena, Márcia Sirlene Zardin Graeff, Marco Antonio Húngaro Duarte, Flaviana Bombarda de Andrade
Objective: The antimicrobial effect of ultrasonic agitation of calcium hydroxide (CH) pastes in infected bovine dentin and their penetrability were evaluated using confocal laser scanning microscopy (CLSM) and microbiological culture. Material and Methods: Fifty-two bovine teeth were infected with Enterococcus faecalis using a new contamination protocol; then they received CH paste and were divided into groups with or without ultrasound. Ultrasonic agitation was conducted for 1 min with a plain point insert...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28076457/removal-of-calcium-hydroxide-from-weine-type-ii-systems-using-photon-induced-photoacoustic-streaming-passive-ultrasonic-and-needle-irrigation-a-microcomputed-tomography-study
#12
Adam Lloyd, Geraldine Navarrete, Melissa Andreia Marchesan, David Clement
Objective: This study compared the effectiveness of Er:YAG laser-activated irrigation (PIPS), passive ultrasonic irrigation (PUI) with EndoUltra and standard needle irrigation (SNI) in the removal of calcium hydroxide [Ca(OH)2] from the mesial roots of Weine Type II mandibular molars. Material and Methods: Thirty mandibular molars were screened by µCT for the presence of mesial roots with complex intra-canal anatomy and a common apical foramen. The teeth were enlarged to a standardized 25/...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28068104/unraveling-interactions-between-ionic-liquids-and-phospholipid-vesicles-using-nanoplasmonic-sensing
#13
Joanna Witos, Giacomo Russo, Suvi-Katriina Ruokonen, Susanne K Wiedmer
Owing to their unique properties and unlimited structural combinations, the ubiquitous use of ionic liquids (ILs) is steadily increasing. The objective of the present work is to shed light onto the effects of amidinium- and phosphonium-based ILs on phospholipid vesicles using a nanoplasmonic sensing measurement technique. A new and relatively simple method was developed for the immobilization of large unilamellar vesicles on two different hydrophilic surfaces composed of titanium dioxide and silicon nitride nanolayers...
January 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28050518/revitalization-of-an-immature-permanent-mandibular-molar-with-a-necrotic-pulp-using-platelet-rich-fibrin-a-case-report
#14
Dayalan Subash, Krishnamma Shoba, Shibu Aman, Srinivasan Kumar Indu Bharkavi
Any insult to the pulp during its development causes cessation of dentin formation and root growth. Pulpal status and degree of root development are the decisive factors in the treatment approach. Various treatment options have been tried like surgery with root-end sealing, calcium hydroxide-apexification, placement of apical plug and regenerative endodontic procedures to induce apexogenesis. An ideal scenario for a necrosed tooth with immature root would be continued root development coupled with regeneration of pulp tissue...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28048345/su-d-brc-04-development-of-proton-tissue-equivalent-materials-for-calibration-and-dosimetry-studies
#15
E Olguin, S Flampouri, I Lipnharski, W Bolch
PURPOSE: To develop new proton tissue equivalent materials (PTEM), urethane and fiberglass based, for proton therapy calibration and dosimetry studies. Existing tissue equivalent plastics are applicable only for x-rays because they focus on matching mass attenuation coefficients. This study aims to create new plastics that match mass stopping powers for proton therapy applications instead. METHODS: New PTEMs were constructed using urethane and fiberglass resin materials for soft, fat, bone, and lung tissue...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28040502/a-comparison-between-effect-of-photodynamic-therapy-by-led-and-calcium-hydroxide-therapy-for-root-canal-disinfection-against-enterococcus-faecalis-a-randomized-controlled-trial
#16
Mohammad Asnaashari, Hengameh Ashraf, Afsaneh Rahmati, Neda Amini
BACKGROUND: Insufficient root canal disinfection is one of the main reasons for persistent periapical pathology. Photodynamic therapy (PDT) has been proven effective in disinfecting infected root canals. The aim of this study was to evaluate the antimicrobial effect of photo activated disinfection (PAD) when using toluidine blue as photosensitizer and a LED lamp after the conventional treatment, and comparing it with calcium hydroxide therapy in vivo. METHODS: This clinical trial includes 20 patients with molars requiring endodontic retreatment...
December 28, 2016: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28027490/magnesium-alloys-and-graphite-wastes-encapsulated-in-cementitious-materials-reduction-of-galvanic-corrosion-using-alkali-hydroxide-activated-blast-furnace-slag
#17
D Chartier, B Muzeau, L Stefan, J Sanchez-Canet, C Monguillon
Magnesium alloys and graphite from spent nuclear fuel have been stored together in La Hague plant. The packaging of these wastes is under consideration. These wastes could be mixed in a grout composed of industrially available cement (Portland, calcium aluminate…). Within the alkaline pore solution of these matrixes, magnesium alloys are imperfectly protected by a layer of Brucite resulting in a slow corrosion releasing hydrogen. As the production of this gas must be considered for the storage safety, and the quality of wasteform, it is important to select a cement matrix capable of lowering the corrosion kinetics...
December 15, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28009877/effects-of-reduced-dimensionality-on-the-properties-of-magnesium-hydroxide-and-calcium-hydroxide-nanostructures
#18
Soran Jahangiri, Nicholas J Mosey
Metal hydroxides are a class of layered materials that contain two-dimensional metal hydroxide layers that can be isolated to form layered nanostructures. In this work, density functional theory (DFT) and self-consistent-charge density-functional tight-binding (SCC-DFTB) methods have been used to investigate the properties of magnesium hydroxide and calcium hydroxide nanostructures. The properties of single layer and multi layer structures with up to 10 metal hydroxide sheets and nanoparticles containing more than 2000 atoms have been calculated and compared with the bulk properties of these systems...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28000038/management-of-pulps-exposed-during-carious-tissue-removal-in-adults-a-multi-national-questionnaire-based-survey
#19
Lina Stangvaltaite, Falk Schwendicke, Christopher Holmgren, Marion Finet, Marisa Maltz, Karim Elhennawy, Eero Kerosuo, Sophie Doméjean
OBJECTIVES: The aim of the present study was to investigate and compare the management of pulps exposed during carious tissue removal by French, German, and Norwegian general dental practitioners (GDPs). We further aimed to assess possible dentist- and patient-related factors associated with these management decisions. MATERIALS AND METHODS: A structured questionnaire was send via mail to a simple random sample of dentists. RESULTS: The analyzed sample consisted of 661 (33%) French GDPs, 622 (25%) German GDPs, and 199 (34%) Norwegian GDPs...
December 20, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27994420/comparative-evaluation-of-platelet-rich-fibrin-mineral-trioxide-aggregate-and-calcium-hydroxide-as-pulpotomy-agents-in-permanent-molars-with-irreversible-pulpitis-a-randomized-controlled-trial
#20
Varun Kumar, Ruchi Juneja, Jigyasa Duhan, Pankaj Sangwan, Sanjay Tewari
BACKGROUND: Pulpotomy has been proposed as an alternative for the management of irreversible pulpitis in permanent molars with closed apices. AIM: To compare the performances of calcium hydroxide (CH), mineral trioxide aggregate (MTA), and platelet-rich fibrin (PRF) as pulpotomy agents in mature permanent molars with irreversible pulpitis. MATERIALS AND METHODS: Fifty-four permanent mandibular molars with carious exposure and symptoms of irreversible pulpitis were randomly allocated to three groups, and full pulpotomy was performed using CH, MTA, or PRF as pulpotomy agents...
October 2016: Contemporary Clinical Dentistry
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