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Silicate Calcium Phosphate

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https://www.readbyqxmd.com/read/29737429/properties-of-calcium-silicate-monobasic-calcium-phosphate-materials-for-endodontics-containing-tantalum-pentoxide-and-zirconium-oxide
#1
Fausto Zamparini, Francesco Siboni, Carlo Prati, Paola Taddei, Maria Giovanna Gandolfi
OBJECTIVE: The aim of the study was to evaluate chemical-physical properties and apatite-forming ability of three premixed calcium silicate materials containing monobasic calcium phosphate (CaH4 P2 O8 ) bioceramic, tantalum pentoxide and zirconium oxide, recently marketed for endodontics (TotalFill BC-Sealer, BC-RRM-Paste, BC-RRM-Putty). MATERIALS AND METHODS: Microchemical and micromorphological analyses, radiopacity, initial and final setting times, calcium release and alkalising activity were tested...
May 8, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29656513/acidic-and-alkaline-chemicals-influence-on-a-tricalcium-silicate-based-dental-biomaterial
#2
Prasanna Neelakantan, Todd Berger, Carolyn Primus, Hagay Shemesh, Paul R Wesselink
Bioactive hydraulic tricalcium silicate materials are commonly used in several dental procedures. Mineral Trioxide Aggregate (MTA) is one such material, which is used in a variety of clinical applications, the most recent of which is root canal sealing material, during which, the MTA potentially comes in contact with remnants of the chemical agents used for disinfecting root canals. The effects of commonly used root canal irrigating solutions on MTA have not been investigated in depth, thus far. The aim of this study was to determine the effect of five common chemical agents used in root canal preparation (sodium hypochlorite/NaOCl, ethylene diaminetetraacetic acid/EDTA, mixture of sodium hypochlorite and etidronic acid/NaOCl + EA, mixture of EDTA and Chlorhexidine/QMix, or saline) on a commercial tricalcium silicate (MTA Plus)...
April 15, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29652784/a-prospective-randomized-multicenter-study-comparing-silicated-calcium-phosphate-versus-bmp-2-synthetic-bone-graft-in-posterolateral-instrumented-lumbar-fusion-for-degenerative-spinal-disorders
#3
Marc Coughlan, Mark Davies, Adriaan K Mostert, Dharmin Nanda, Paul C Willems, Geoffrey Rosenberg, Richard Ferch
STUDY DESIGN: A prospective, Phase IV, multicenter, randomized study. OBJECTIVE: To compare vertebral fusion success rates following posterolateral fusion ((PLF)/posterolateral intertransverse fusion (PITF)) surgery. The surgical procedure combined posterior lumbar interbody fusion (PLIF) and PLF with internal fixation over one or two levels using silicated calcium phosphate (SiCaP) or bone morphogenetic protein (BMP)-2 as graft material in patients with a degenerative disorder of the lumbar spine...
April 12, 2018: Spine
https://www.readbyqxmd.com/read/29603021/microstructure-and-chemical-analysis-of-four-calcium-silicate-based-cements-in-different-environmental-conditions
#4
K Ashofteh Yazdi, Sh Ghabraei, B Bolhari, M Kafili, N Meraji, M H Nekoofar, P M H Dummer
OBJECTIVE: The objective of this study was to analyze the microstructure and crystalline structures of ProRoot MTA, Biodentine, CEM Cement, and Retro MTA when exposed to phosphate-buffered saline, butyric acid, and blood. METHODS AND MATERIALS: Mixed samples of ProRoot MTA, Biodentine, CEM Cement, and Retro MTA were exposed to either phosphate-buffered saline, butyric acid, or blood. Scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopic (EDX) evaluations were conducted of specimens...
March 30, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29576841/different-setting-conditions-affect-surface-characteristics-and-microhardness-of-calcium-silicate-based-sealers
#5
Dong-Kyu Yang, Sunil Kim, Jeong-Won Park, Euiseong Kim, Su-Jung Shin
Objective: To investigate the effect of different setting conditions on surface microhardness and setting properties of calcium silicate-based sealers. Methods: Three sealers, EndoSequence Bioceramic (BC; Brasseler USA, Savannah, GA, USA), Endoseal MTA (ES; Maruchi, Wonju, Korea), and Well-Root ST (WR; Vericom, Chuncheon, Korea), were compared. Specimens were exposed to either butyric acid (pH 5.4) or phosphate-buffered saline (PBS [pH 7.4]) for 48 h and stored at 100% humidity for 12 days...
2018: Scanning
https://www.readbyqxmd.com/read/29576580/in-vitro-cytotoxic-evaluation-of-novel-fast-setting-calcium-silicate-cement-compositions-and-dental-materials-using-colorimetric-methyl-thiazolyl-tetrazolium-assay
#6
Bahram Ranjkesh, Flemming Isidor, David Christian Evar Kraft, Henrik Løvschall
A novel fast-setting calcium silicate cement with fluoride (CSC) has been developed for potential application in tooth crowns. This study compared the cytotoxicity of CSC compositions and a variety of dental materials. We tested CSC compositions (Protooth), MTA, Biodentine, Ketac Molar, Fuji II LC, Vitrebond, DeTrey Zinc, Dycal, and IRM, DMEM (negative control) and 1% NaOCl (positive control). After setting of cements for 24 h, specimens were immersed in DMEM for 24 h to obtain material elutes. The elutes were serially diluted in serum-free DMEM to obtain three dilutions...
2018: Journal of Oral Science
https://www.readbyqxmd.com/read/29550005/cytotoxicity-of-a-new-calcium-silicate-endodontic-sealer
#7
Triantafyllia Vouzara, Garyfallia Dimosiari, Elisabeth A Koulaouzidou, Nikolaos Economides
INTRODUCTION: Resin sealers with biocompatible and bioactive additives have been used in clinical practice. Recently, a calcium silicate root canal sealer was introduced under the name BioRoot RCS (Septodont, Saint Maur-des-Fossés, France). The aim of this study was to evaluate the effects of BioRoot RCS on cell survival and proliferation of cultured cells in parallel with an epoxy resin sealer with calcium phosphate and calcium oxide and a salicylate resin sealer with mineral trioxide aggregate filler...
March 14, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29549051/3d-printed-ifn-%C3%AE-loading-calcium-silicate-%C3%AE-tricalcium-phosphate-scaffold-sequentially-activates-m1-and-m2-polarization-of-macrophages-to-promote-vascularization-of-tissue-engineering-bone
#8
Tao Li, Mingzheng Peng, Zezheng Yang, Xiaojun Zhou, Yuan Deng, Chuan Jiang, Ming Xiao, Jinwu Wang
To promote vascularization of tissue-engineered bone, IFN-γ polarizing macrophages to M1 was loaded on 5% calcium silicate/β-tricalcium phosphate (CaSiO3 -β-TCP) scaffolds. IFN-γ and Si released from the scaffold were designed to polarize M1 and M2 macrophages, respectively. β-TCP, CaSiO3 -β-TCP, and IFN-γ@CaSiO3 -β-TCP were fabricated and biocompatibilities were evaluated. Polarizations of macrophages were detected by flow cytometry. Human umbilical vein endothelial cells with GFP were cultured and induced on Matrigel with conditioned culture medium extracted from culture of macrophages loaded on scaffolds for evaluating angiogenesis...
March 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29467439/optimized-bone-regeneration-in-calvarial-bone-defect-based-on-biodegradation-tailoring-dual-shell-biphasic-bioactive-ceramic-microspheres
#9
Antian Xu, Chen Zhuang, Shuxin Xu, Fuming He, Lijun Xie, Xianyan Yang, Zhongru Gou
Bioceramic particulates capable of filling bone defects have gained considerable interest over the last decade. Herein, dual-shell bioceramic microspheres (CaP@CaSi@CaP, CaSi@CaP@CaSi) with adjustable beta-tricalcium phosphate (CaP) and beta-calcium silicate (CaSi) distribution were fabricated using a co-concentric capillary system enabling bone repair via a tailorable biodegradation process. The in vitro results showed the optimal concentration (1/16 of 200 mg/ml) of extracts of dual-shell microspheres could promote bone marrow mesenchymal cell (BMSC) proliferation and enhance the level of ALP activity and Alizarin Red staining...
February 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29427945/bioactive-calcium-phosphate-silicate-ceramic-surface-modified-plga-for-tendon-to-bone-healing
#10
Jingshu Guo, Congqin Ning, Xuanyong Liu
Due to the dissimilar features between the tendon and bone, tendon to bone healing is the most challenging problems in sports medicine. In the present work, a novel bioactive calcium phosphate silicate ceramic (CPS) was coated on the surface of PLGA films using electron beam evaporation (EBE) technique to prepare a tailorable composite film with layered chemical composition similar to tendon-bone interface. The physicochemical behaviors of the CPS-PLGA composite films were characterized and the cytocompatibility were also investigated...
April 1, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29403228/reinforcing-effects-of-calcium-silicate-based-cement-and-dual-cure-composite-resin-in-simulated-immature-teeth-with-an-open-apex-an-in-vitro-study
#11
Murtuza S Zhabuawala, Roopa R Nadig, Veena S Pai, Yashwanth Gowda, Ranjini M Aswathanarayana
Aim: To evaluate the fracture resistance of simulated immature teeth with an apical plug of biodentine followed by composite resin vs total obturation with biodentine tested immediately and after 3 months of aging and also to find out the chemical composition of dentin in contact with these materials. Materials and methods: Extracted human maxillary central incisors with simulated immature apex with radicular dentin thickness (RDT) of 1 to 1.5 mm selected and divided into three groups of 20 each...
October 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29334137/calcium-phosphate-precipitation-in-experimental-gaps-between-fluoride-containing-fast-setting-calcium-silicate-cement-and-dentin
#12
Bahram Ranjkesh, Ming Ding, Michel Dalstra, Jens R Nyengaard, Jacques Chevallier, Flemming Isidor, Henrik Løvschall
A novel fast-setting calcium silicate cement containing fluoride (novel-CSC) has been developed for applications in tooth crowns. The aim of this study was to assess the ability of the novel-CSC to close the experimental gaps at the dentin-cement interface. The novel-CSC was tested against Vitrebond and GC Fuji II LC. Experimental gaps of 50 or 300 μm width were created between the materials and dentin. Specimens with the 300-μm-wide gap were immersed in phosphate-buffered saline and the closed gap area was measured during 96 h...
April 2018: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/29280098/dual-slag-filters-for-enhanced-phosphorus-removal-from-domestic-waste-water-performance-and-mechanisms
#13
Minyu Zuo, Gunno Renman, Jon Petter Gustafsson, Wantana Klysubun
The phosphorus (P) removal of five combinations of dual filters consisting of blast furnace slag (BFS), argon oxygen decarburisation slag (AOD) and electric arc furnace slag (EAF) was evaluated in column experiments with domestic waste water. The columns were fed with waste water for 24 days. The column with only EAF had the best P removal performance (above 93% throughout the experiment). The speciation of the bound P was evaluated by P K-edge X-ray absorption near-edge structure (XANES) spectroscopy. In all five columns, the main P species of the slag packed in the outlet chamber was amorphous calcium phosphate (ACP)...
March 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29261194/calcium-based-biomaterials-for-diagnosis-treatment-and-theranostics
#14
REVIEW
Chao Qi, Jing Lin, Lian-Hua Fu, Peng Huang
Calcium-based (CaXs) biomaterials including calcium phosphates, calcium carbonates, calcium silicate and calcium fluoride have been widely utilized in the biomedical field owing to their excellent biocompatibility and biodegradability. In recent years, CaXs biomaterials have been strategically integrated with imaging contrast agents and therapeutic agents for various molecular imaging modalities including fluorescence imaging, magnetic resonance imaging, ultrasound imaging or multimodal imaging, as well as for various therapeutic approaches including chemotherapy, gene therapy, hyperthermia therapy, photodynamic therapy, radiation therapy, or combination therapy, even imaging-guided therapy...
January 22, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/29233539/effect-of-tetracalcium-phosphate-monetite-toothpaste-on-dentin-remineralization-and-tubule-occlusion-in-vitro
#15
L Medvecky, R Stulajterova, M Giretova, J Mincik, M Vojtko, J Balko, J Briancin
OBJECTIVES: To investigate the tubule occlusion and remineralization potential of a novel toothpaste with active tetracalcium phosphate/monetite mixtures under de/remineralization cycling. METHODS: Dentin de/remineralization cycling protocol consisted of demineralization in 1% citric acid at pH 4.6 with following remineralization with toothpastes and soaking in artificial saliva. Effectiveness of toothpastes to promote remineralization was evaluated by measurement of microhardness recovery, analysis of surface roughness, thickness of coating and scanning electron microscopy...
March 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29197578/magnesium-based-bioceramics-in-orthopedic-applications
#16
REVIEW
Maryam Nabiyouni, Theresa Brückner, Huan Zhou, Uwe Gbureck, Sarit B Bhaduri
Magnesium ions are directly involved in numerous biological mechanisms; for example, they play an important part in the regulation of ion channels, DNA stabilization, enzyme activation and stimulation of cell growth and proliferation. This alkaline earth metal has gained great popularity in orthopedic applications in recent years. Magnesium-based bioceramics include a large group of magnesium containing compounds such as oxides, phosphates and silicates, that are involved in orthopedic applications like bone cements, bone scaffolds or implant coatings...
January 15, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29186932/ionic-substitutions-in-non-apatitic-calcium-phosphates
#17
REVIEW
Aleksandra Laskus, Joanna Kolmas
Calcium phosphate materials (CaPs) are similar to inorganic part of human mineralized tissues (i.e., bone, enamel, and dentin). Owing to their high biocompatibility, CaPs, mainly hydroxyapatite (HA), have been investigated for their use in various medical applications. One of the most widely used ways to improve the biological and physicochemical properties of HA is ionic substitution with trace ions. Recent developments in bioceramics have already demonstrated that introducing foreign ions is also possible in other CaPs, such as tricalcium phosphates (amorphous as well as α and β crystalline forms) and brushite...
November 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29179970/an-interproximal-model-to-determine-the-erosion-protective-effect-of-calcium-silicate-sodium-phosphate-fluoride-formulations
#18
Natalie J Wood, Siân Bodfel Jones, Nick Chapman, Andrew Joiner, Carole J Philpotts, Nicola X West
OBJECTIVES: Previous work has shown the effectiveness of a newly developed interproximal model to differentiate between the amount of remineralization caused by toothpastes used with or without a dual-phase gel treatment system containing calcium silicate, sodium phosphate salts and fluoride to repair acid-softened enamel. The aim of this study was to utilize the same interproximal model to identify how effective calcium silicate phosphate toothpastes are at reducing surface softening in the early stages of erosion...
February 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29164537/simple-technology-for-recycling-phosphate-from-wastewater-to-farmland-in-rural-areas
#19
Hisao Ohtake, Kenji Okano, Masashi Kunisada, Hiroyuki Takano, Masaya Toda
A simple technology for phosphate (Pi ) recovery has been developed using a bifunctional adsorption-aggregation agent. The bifunctional agent was prepared by soaking calcium silicates in hydrochloric acid solution. Importantly, recyclable calcium silicates were available almost free of charge from the cement industry and also from the steel industry. The acid treatment was essential not only for enhancing the ability of calcium silicates to remove Pi from aqueous solution but also for enabling the high settleability of removed Pi ...
January 2018: Ambio
https://www.readbyqxmd.com/read/29025644/polylactic-acid-based-porous-scaffolds-doped-with-calcium-silicate-and-dicalcium-phosphate-dihydrate-designed-for-biomedical-application
#20
Maria Giovanna Gandolfi, Fausto Zamparini, Micaela Degli Esposti, Federica Chiellini, Conrado Aparicio, Fabio Fava, Paola Fabbri, Paola Taddei, Carlo Prati
Polylactic acid (PLA), dicalcium phosphate dihydrate (DCPD) and/or hydraulic calcium silicate (CaSi) have been used to prepare highly-porous scaffolds by thermally induced phase separation technique (TIPS). Three experimental mineral-doped formulations were prepared (PLA-10CaSi, PLA-5CaSi-5DCPD, PLA-10CaSi-10DCPD). Pure PLA scaffolds constituted the control group. Scaffolds were tested for their chemical-physical and biological properties, namely calcium release, alkalinizing activity, surface microchemistry and micromorphology by ESEM, apatite-forming ability by EDX, micro-Raman and IR spectroscopy, thermal properties by differential scanning calorimetry, mechanical properties by quasi-static parallel-plates compression testing, porosity by a standard water-absorption method and direct-contact cytotoxicity...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
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