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Silicate Calcium Phosphate

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https://www.readbyqxmd.com/read/28043751/bone-incorporation-of-silicate-substituted-calcium-phosphate-in-2-stage-revision-anterior-cruciate-ligament-reconstruction-a-histologic-and-radiographic-study
#1
Jan von Recum, Johannes Schwaab, Thorsten Guehring, Paul-Alfred Grützner, Marc Schnetzke
PURPOSE: To evaluate the histologic and radiographic outcomes of using silicate-substituted calcium phosphate (Si-CaP) as bone graft substitute for the augmentation of tunnel defects in 2-stage revision anterior cruciate ligament (ACL) reconstruction. METHODS: Forty patients undergoing 2-stage revision ACL reconstruction were included in a prospective, randomized controlled clinical trial between 2012 and 2015. The inclusion criteria were tunnel diameter of the tibial and/or femoral tunnel of 10 mm or greater after failed ACL reconstruction...
December 30, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27987674/biodegradable-ceramic-polymer-composites-for-biomedical-applications-a-review
#2
REVIEW
Michal Dziadek, Ewa Stodolak-Zych, Katarzyna Cholewa-Kowalska
The present work focuses on the state-of-the-art of biodegradable ceramic-polymer composites with particular emphasis on influence of various types of ceramic fillers on properties of the composites. First, the general needs to create composite materials for medical applications are briefly introduced. Second, various types of polymeric materials used as matrices of ceramic-containing composites and their properties are reviewed. Third, silica nanocomposites and their material as well as biological characteristics are presented...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27977862/evaluation-of-the-ca-ion-release-ph-and-surface-apatite-formation-of-a-prototype-tricalcium-silicate-cement
#3
S Yamamoto, L Han, Y Noiri, T Okiji
AIM: To evaluate the Ca(2+) -releasing, alkalizing, and apatite-like surface precipitate-forming abilities of a prototype tricalcium silicate cement, which was mainly composed of synthetically prepared tricalcium silicate and zirconium oxide radiopacifier. METHODOLOGY: The prototype tricalcium silicate cement, white ProRoot MTA (WMTA), and TheraCal LC (a light-cured resin-modified calcium silicate-filled material) were examined. The chemical compositions were analyzed with a wavelength-dispersive X-ray spectroscopy electron probe microanalyzer with an image observation function (SEM-EPMA)...
December 15, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27973852/calcium-silicate-phases-explained-by-high-temperature-resistant-phosphate-probe-molecules
#4
Nicolas Giraudo, Samuel Bergdolt, Jonas Wohlgemuth, Alexander Welle, Rainer Schuhmann, Franz Königer, Peter Thissen
In this work, high-temperature-resistant phosphate molecules are applied to characterize ultrathin (100 nm) calcium silicate (C-S) phases. These C-S phases are synthesized on silicon wafers, and the interaction of phosphates with the C-S phases is studied by means of in situ transmission Fourier transform infrared (FTIR) spectroscopy. At room temperature, the chemistry of the system is dominated by the formation of calcium phosphates (C-P). In the case of temperature rising to 1000 °C, the C-S phases are regenerated...
December 27, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27939732/ion-release-microstructural-and-biological-properties-of-iroot-bp-plus-and-proroot-mta-exposed-to-an-acidic-environment
#5
Jun Tian, Yuanhe Zhang, Zhihui Lai, Mengjie Li, Yu Huang, Hongwei Jiang, Xi Wei
INTRODUCTION: This study evaluated how exposing the novel calcium silicate nanoparticulate bioceramic iRoot BP Plus (Innovative Bioceramix, Vancouver, Canada) to an acidic environment affects ion release from this material and alters MC3T3-E1 preosteoblast viability on and attachment to this material. These factors were compared against those of ProRoot MTA under similar conditions. METHODS: Each material was exposed to phosphate-buffered saline (pH = 7.4) or butyric acid (pH = 5...
January 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/27750543/phosphorus-removal-from-uasb-reactor-effluent-by-reactive-media-filtration
#6
Raúl Rodríguez-Gómez, Gunno Renman
The phosphorus (P) and BOD7 removal performance of an upflow packed bed reactor (PBR) filled with two reactive filter media was studied over 50 weeks. The lower one-fifth of the reactor was filled with calcium-silicate-hydrate (Sorbulite®) and the upper four-fifth with calcium-silicate (Polonite®). A laboratory-scale upflow anaerobic sludge bed reactor (UASB) delivered wastewater to the PBR. A model was developed to describe the gradient in P concentration change in the reactor, based on reaction kinetics...
October 18, 2016: Environmental Technology
https://www.readbyqxmd.com/read/27623299/radiographic-and-clinical-outcome-of-silicate-substituted-calcium-phosphate-si-cap-ceramic-bone-graft-in-spinal-fusion-procedures
#7
Marjan Alimi, Rodrigo Navarro-Ramirez, Karishma Parikh, Innocent Njoku, Christoph P Hofstetter, Apostolos J Tsiouris, Roger Härtl
STUDY DESIGN: Retrospective cohort study. OBJECTIVE: To evaluate the radiographic and clinical outcome of silicate-substituted calcium phosphate (Si-CaP), utilized as a graft substance in spinal fusion procedures. SUMMARY OF BACKGROUND DATA: Specific properties of Si-CaP provide the graft with negative surface charge that can result in a positive effect on the osteoblast activity and neovascularization of the bone. METHODS: This study included those patients who underwent spinal fusion procedures between 2007 and 2011 in which Si-CaP was used as the only bone graft substance...
September 10, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27612739/nanostructured-silicate-substituted-calcium-phosphate-nanosicaps-nanoparticles-efficient-calcium-phosphate-based-non-viral-gene-delivery-systems
#8
Sudhanshu Shekhar, Abhijit Roy, Daeho Hong, Prashant N Kumta
Nanostructured ceramic particles, particularly, nanoparticles of calcium phosphate (CaP) remain an attractive option among the various types of non-viral gene delivery vectors studied because of their safety, biocompatibility, biodegradability, and ease of handling as well as their adsorptive capacity for DNA. We have accordingly developed an enhanced version of nanostructured calcium phosphates (NanoCaPs), by substituting known amounts of silicate for phosphate in the hydroxyapatite (HA) lattice (NanoSiCaPs)...
December 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27530933/effects-of-an-iron-silicon-material-a-synthetic-zeolite-and-an-alkaline-clay-on-vegetable-uptake-of-as-and-cd-from-a-polluted-agricultural-soil-and-proposed-remediation-mechanisms
#9
Aijun Yao, Yani Wang, Xiaodan Ling, Zhe Chen, Yetao Tang, Hao Qiu, Rongrong Ying, Rongliang Qiu
Economic and highly effective methods of in situ remediation of Cd and As polluted farmland in mining areas are urgently needed. Pot experiments with Brassica chinensis L. were carried out to determine the effects of three soil amendments [a novel iron-silicon material (ISM), a synthetic zeolite (SZ) and an alkaline clay (AC)] on vegetable uptake of As and Cd. SEM-EDS and XRD analyses were used to investigate the remediation mechanisms involved. Amendment with ISM significantly reduced the concentrations of As and Cd in edible parts of B...
August 16, 2016: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/27523906/properties-of-tricalcium-silicate-sealers
#10
Issam Khalil, Alfred Naaman, Josette Camilleri
INTRODUCTION: Sealers based on tricalcium silicate cement aim at an interaction of the sealer with the root canal wall, alkalinity with potential antimicrobial activity, and the ability to set in a wet field. The aim of this study was to characterize and investigate the properties of a new tricalcium silicate-based sealer and verify its compliance to ISO 6876 (2012). METHODS: A new tricalcium silicate-based sealer (Bio MM; St Joseph University, Beirut, Lebanon), BioRoot RCS (Septodont, St Maure de Fosses, France), and AH Plus (Dentsply, DeTrey, Konstanz, Germany) were investigated...
October 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27509265/phase-transformations-microstructure-formation-and-in-vitro-osteoblast-response-in-calcium-silicate-brushite-cement-composites
#11
T Sopcak, L Medvecky, M Giretova, A Kovalcikova, R Stulajterova, J Durisin
Self-setting simple calcium silicate/brushite (B) biocements with various Ca/P ratios were prepared by mutual mixing of both monocalcium silicate hydrate (CSH) or β-wollastonite (woll) powders with B and the addition of 2 wt% NaH2PO4 solution as a hardening liquid. The phase composition of the final composites and the texture of the surface calcium phosphate/silica layer were controlled by the starting Ca/P ratio in composites and the pH during setting. It was verified that the presence of continuous bone-like calcium phosphate coating on the surface of the samples was not essential for in vitro osteoblast proliferation...
2016: Biomedical Materials
https://www.readbyqxmd.com/read/27466864/stem-cells-in-spine-surgery
#12
Kenneth K Hansraj
INTRODUCTION: Spine surgeons are embracing advanced biologic technologies in an attempt to help millions of people achieve a better outcome in spine surgery. These new technologies may be complicated to understand, partly because the contribution of different types of cells has not been definitively identified. This paper describes the characteristics of the stem cells used in spine surgery, including their actions and possible complications. The description necessitates an overview of all studies to date on the use of stem cells in spine surgery, as well as other cells used in cellular therapy...
July 29, 2016: Surgical Technology International
https://www.readbyqxmd.com/read/27443165/rediscovering-chemical-gardens-self-assembling-cytocompatible-protein-intercalated-silicate-phosphate-sponge-mimetic-tubules
#13
Kamia Punia, Michael Bucaro, Andrew Mancuso, Christina Cuttitta, Alexandra Marsillo, Alexey Bykov, William L'Amoreaux, Krishnaswami S Raja
The classic chemical garden experiment is reconstructed to produce protein-intercalated silicate-phosphate tubules that resemble tubular sponges. The constructs were synthesized by seeding calcium chloride into a solution of sodium silicate-potassium phosphate and gelatin. Sponge-mimetic tubules were fabricated with varying percentages of gelatin (0-15% w/v), in diameters ranging from 200 μm to 2 mm, characterized morphologically and compositionally, functionalized with biomolecules for cell adhesion, and evaluated for cytocompatibility...
August 30, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27428393/to-the-editor
#14
Bradley K Weiner, Paige E Vargo
No abstract text is available yet for this article.
September 1, 2016: Spine
https://www.readbyqxmd.com/read/27388334/osteogenic-and-anti-osteoporotic-effects-of-risedronate-added-calcium-phosphate-silicate-cement
#15
Tianxing Gong, Yadong Chen, Yixi Zhang, Yubiao Zhang, Xinwei Liu, Tom Troczynski, Urs O Häfeli
Osteoporosis greatly impairs bone fracture restoration with bone cement because the accelerated resorption decreases the osseointegration between bone and implants. In this study, we designed a new drug delivery system based on the third generation bisphosphonate risedronate (RA) and the osteogenic calcium phosphate silicate cement (CPSC). The impact of RA on CPSC's material properties and microstructure was evaluated by different characterization methods (μCT, XRD, FTIR, SEM and gas sorption). In addition, in vitro biocompatibility of RA-added CPSC was evaluated (MTT assay, flow cytometry, real-time PCR)...
2016: Biomedical Materials
https://www.readbyqxmd.com/read/27359353/to-the-editor
#16
Kern Singh, Sreeharsha V Nandyala, Alejandro Marquez-Lara, Steven J Fineberg, Miguel Pelton
No abstract text is available yet for this article.
September 1, 2016: Spine
https://www.readbyqxmd.com/read/27335901/apatite-precipitation-on-a-novel-fast-setting-calcium-silicate-cement-containing-fluoride
#17
Bahram Ranjkesh, Jacques Chevallier, Hamideh Salehi, Frédéric Cuisinier, Flemming Isidor, Henrik Løvschall
Aim: Calcium silicate cements are widely used in endodontics. Novel fast-setting calcium silicate cement with fluoride (Protooth) has been developed for potential applications in teeth crowns including cavity lining and cementation. Objective: To evaluate the surface apatite-forming ability of Protooth compositions as a function of fluoride content and immersion time in phosphate-buffered saline (PBS). Material and methods: Three cement compositions were tested: Protooth (3.5% fluoride and 10% radiocontrast), ultrafast Protooth (3...
January 1, 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/27305523/a-bioceramic-with-enhanced-osteogenic-properties-to-regulate-the-function-of-osteoblastic-and-osteocalastic-cells-for-bone-tissue-regeneration
#18
Seyed-Iman Roohani-Esfahani, Young Jung No, Zufu Lu, Pei Ying Ng, Yongjuan Chen, Jeffrey Shi, Nathan J Pavlos, Hala Zreiqat
Bioceramics for regenerative medicine applications should have the ability to promote adhesion, proliferation and differentiation of osteoblast and osteoclast cells. Osteogenic properties of the material are essential for rapid bone regeneration and new bone formation. The aim of this study was to develop a silicate-based ceramic, gehlenite (GLN, Ca2Al2SiO7), and characterise its physiochemical, biocompatibility and osteogenic properties. A pure GLN powder was synthesised by a facile reactive sintering method and compacted to disc-shaped specimens...
2016: Biomedical Materials
https://www.readbyqxmd.com/read/27305515/push-out-bond-strength-of-mta-hp-a-new-high-plasticity-calcium-silicate-based-cement
#19
COMPARATIVE STUDY
Emmanuel Jnl Silva, Nancy Kudsi Carvalho, Mayara Zanon, Plínio Mendes Senna, Gustavo DE-Deus, Mário Luis Zuolo, Alexandre Augusto Zaia
This study was designed to investigate the resistance to dislodgment provided by MTA HP, a new high-plasticity calcium silicate-based cement. Biodentine and White MTA Angelus were used as reference materials for comparison. Three discs 1 ± 0.1 mm thick were obtained from the middle third of the roots of 5 maxillary canines. Three 0.8-mm-wide holes were drilled on the axial surface of each root disc. Standardized irrigation was performed. Then the holes were dried with paper points and filled with one of the three tested cements...
June 14, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/27214521/do-smear-layer-removal-agents-affect-the-push-out-bond-strength-of-calcium-silicate-based-endodontic-sealers
#20
N K Carvalho, M C Prado, P M Senna, A A Neves, E M Souza, S R Fidel, L M Sassone, E J N L Silva
AIM: To evaluate the effect of 17% ethylenediaminetetracetic acid (EDTA), 2.25% Peracetic Acid (PA) or 10% Citric Acid (CA) on the push-out bond strength of calcium-silicate based endodontic sealers [MTA Fillapex (Angelus, Londrina, Brazil) and Total Fill BC Sealer (FKG, La Chaux-de-Fonds, Switzerland)] to root dentine after different periods of immersion in phosphate-buffered saline (PBS). AH Plus (Dentsply DeTrey, Konstaz, Germany) was used as a reference material for comparison. METHODOLOGY: Thirty human maxillary incisors were selected and three 1-mm discs were obtained from the middle third of each root...
May 23, 2016: International Endodontic Journal
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