scholarly journals Calcium phosphate powder synthesis by out-of-phase pulsed sonoelectrochemistry

2019 ◽  
Vol 58 ◽  
pp. 104662 ◽  
Author(s):  
A.L. Daltin ◽  
S. Beaufils ◽  
T. Rouillon ◽  
P. Millet ◽  
J.P. Chopart
Keyword(s):  
Calcium Phosphate ◽  
Powder Synthesis ◽  
Phosphate Powder

scholarly journals Synthesis and characterization of nanostructured ceramics powders for biomedical applications

2007 ◽  
Vol 12 (4) ◽  
pp. 574-582 ◽  
Author(s):  
Nelson Heriberto de Almeida Camargo ◽  
O. J. Bellini ◽  
Enori Gemelli ◽  
M. Tomiyama
Keyword(s):  
Calcium Phosphate ◽  
Nanostructured Materials ◽  
Biomedical Applications ◽  
Calcium Phosphates ◽  
Morphological Characterization ◽  
Synthesis And Characterization ◽  
Powder Synthesis ◽  
Mineralogical Characteristics ◽  
Nanostructured Ceramics

Nanostructured materials have been largely studied in the last few years because they have a great potential to applications in different fields like physics, chemistry, biology, mechanic and medicine. Synthesis and characterization of nanostructured materials is a subject of great interest involving science, market, politicians, government and society. The nanostructured materials are in demand in biomedical area, mainly the bioceramics composed of calcium phosphates (Ca/P), which have an excellent biocompatibility and mineralogical characteristics similar to those of bones. The aim of this work was to optimize the method of powder synthesis of nanostructured calcium phosphate and of nanocomposites composed of calcium phosphate//SiO2n, containing 5, 10 and 15% (in volume) of nanometric silica (SiO2n). The results are expressed according to the method of synthesis, mineralogical and morphological characterization, and thermal behavior for the different compositions of the nanostructured powder synthesized.

Injectable calcium phosphate and styrene–butadiene polymer-based root canal filling material

2021 ◽  
Vol 15 (1) ◽  
pp. 19-26
Author(s):  
Hala B. Kaka ◽  
Raid F. Salman
Keyword(s):  
Calcium Phosphate ◽  
Root Canal ◽  
Setting Time ◽  
Molar Ratio ◽  
Styrene Butadiene Rubber ◽  
Filling Material ◽  
Butadiene Rubber ◽  
Root Canal Filling ◽  
Phosphate Powder ◽  
Styrene Butadiene

Abstract Background Three-dimensional obturation of the root canal system is mandatory for a successful root canal treatment. Using a filling material with optimal properties may enable the root canal to be sealed well and therefore obtain the desired obturation. Objective To develop a new injectable paste endodontic filling material using calcium phosphate powder and a styrene–butadiene emulsion polymer. Methods The powder phase comprised an equivalent molar ratio of tetracalcium phosphate, anhydrous dicalcium phosphate, bismuth oxide, and calcium chloride. The liquid phase comprised a styrene–butadiene rubber emulsion in distilled water. The powder and the liquid were mixed to achieve a paste consistency. The paste was subjected to various tests including flow, setting time, dimensional change, solubility, and radiopacity to indicate its suitability as a root canal filling material. All these tests were conducted according to the American National Standards Institute–American Dental Association for endodontic sealing materials. After passing these tests, the paste was submitted to an injectability test. Results The material showed acceptable flowability with 19.1 ± 1.3 min setting time and 0.61 ± 0.16% shrinkage after 30 days of storage. We found the highest solubility at 24 h (6.62 ± 0.58%), then the solubility decreased to 1.09 ± 0.08% within 3 days. The material was more radiopaque than a 3 mm step on an aluminum wedge. Furthermore, the material showed good injectability of 93.67 ± 1.80%. Conclusions The calcium phosphate powder in styrene–butadiene emulsion met basic requirements for a root canal filling material with promising properties.

scholarly journals Observation of calcium phosphate powder mixed with an adhesive monomer experimentally developed for direct pulp capping and as a bonding agent

2010 ◽  
Vol 29 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Yoshiroh KATOH ◽  
Masaya SUZUKI ◽  
Chikage KATO ◽  
Koichi SHINKAI ◽  
Masaaki OGAWA ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Bonding Agent ◽  
Direct Pulp Capping ◽  
Phosphate Powder ◽  
Pulp Capping

Properties of Calcium Phosphate Powder Prepared from Phosphoryl Oligosaccharides of Calcium

2006 ◽  
pp. 515-518
Author(s):  
Tomohiro Umeda ◽  
Kiyoshi Itatani ◽  
Hiroko Mochizuki ◽  
Ian J. Davies ◽  
Yoshiro Musha ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Phosphate Powder

Calcium Phosphate Powder for Obtaining of Composite Bioceramics

2021 ◽  
Vol 12 (1) ◽  
pp. 34-39
Author(s):  
M. R. Kaimonov ◽  
T. V. Safronova ◽  
Ya. Yu. Filippov ◽  
T. B. Shatalova ◽  
I. I. Preobrazhenskii
Keyword(s):  
Calcium Phosphate ◽  
Phosphate Powder

Properties of calcium phosphate powder synthesized from calcium acetate and sodium hydrophosphate

2011 ◽  
Vol 68 (3-4) ◽  
pp. 131-135 ◽  
Author(s):  
T. V. Safronova ◽  
V. I. Putlyaev ◽  
A. V. Kuznetsov ◽  
N. A. Ketov ◽  
A. G. Veresov
Keyword(s):  
Calcium Phosphate ◽  
Calcium Acetate ◽  
Phosphate Powder

scholarly journals Calcium Phosphate Powder Synthesized from Calcium Acetate and Ammonium Hydrophosphate for Bioceramics Application

Ceramics ◽  
2018 ◽  
Vol 1 (2) ◽  
pp. 375-392 ◽  
Author(s):  
Tatiana Safronova ◽  
Valery Putlayev ◽  
Yaroslav Filippov ◽  
Tatiana Shatalova ◽  
Evgeny Karpushkin ◽  
...  
Keyword(s):  
Phase Composition ◽  
Calcium Phosphate ◽  
Room Temperature ◽  
Calcium Acetate ◽  
Molar Ratio ◽  
Composite Ceramics ◽  
Phosphate Powder ◽  
Starting Solution ◽  
By Products ◽  
Ammonium Hydrophosphate

Calcium phosphate powder was synthesized at room temperature from aqueous solutions of ammonium hydrophosphate and calcium acetate without pH adjusting at constant Ca/P molar ratio 1.5. Phase composition of the as-synthesized powder depended on the precursors concentration: At 2.0 M of calcium acetate in the starting solution, poorly crystallized hydroxyapatite was formed, 0.125 M solution of calcium acetate afforded brushite, and the powders synthesized from 0.25–1.0 M calcium acetate solutions were mixtures of the mentioned phases. Firing at 1100 °C led to complete elimination of the reaction by-products, yet the phase composition of the annealed compacted samples was the following: When 2.0 M solution of calcium acetate was used, the obtained ceramics consisted of β-Ca3(PO4)2, whereas at 0.125 to 1.0 M of calcium acetate, the ceramics was a mixture of β-Ca3(PO4)2 and β-Ca2P2O7. Synthesized calcium phosphate powders can be used as the powdered precursors for biocompatible bioresorbable composite ceramics production.

scholarly journals PREPARATION AND IN VITRO TEST OF APATITE FILMS ONTO TITANIUM BY SPUTTERING FROM CALCIUM PHOSPHATE POWDER TARGETS

1999 ◽  
Vol 10 (0) ◽  
pp. 370-374
Author(s):  
JUN-ICHI HAMAGAMI ◽  
DAISUKE KOKUBU ◽  
KIYOSHI KANAMURA ◽  
TAKAO UMEGAKI ◽  
KIMIHIRO YAMASHITA
Keyword(s):  
Calcium Phosphate ◽  
In Vitro Test ◽  
Phosphate Powder ◽  
Vitro Test

Fabrication of Artificial Bone by the Combination of Electrospinning, Extrusion and Slurry Processes

2010 ◽  
Vol 654-656 ◽  
pp. 2233-2236
Author(s):  
Thi Hiep Nguyen ◽  
Byong Taek Lee
Keyword(s):  
Calcium Phosphate ◽  
Biphasic Calcium Phosphate ◽  
Compact Bone ◽  
Bone Scaffold ◽  
Spongy Bone ◽  
Artificial Bone ◽  
Sem Images ◽  
Phosphate Powder ◽  
Slurry Method ◽  
Coated Collagen

In this work, we focused on the manufacture of artificial bone for medical replacement based on the combination of individual properties of ceramic and polymer. Here, periosteum was fabricated with a HAp (Hydroxylapatite) frame, while compact bone was fabricated from multi-layer electro-spun PS (polystyrene)/PCL (polycaprolactone) using biocompatible collagen glue. Spongy bone is formed from PCL/PLGA spongy loading BCP (Biphasic Calcium Phosphate) powder coated collagen. SEM images showed successful fabrication of the artificial bone scaffold through a combination of electro-spinning, extrusion, and use of the slurry method.

Properties of Calcium Phosphate Powder Prepared from Phosphoryl Oligosaccharides of Calcium

2006 ◽  
Vol 309-311 ◽  
pp. 515-518 ◽  
Author(s):  
Tomohiro Umeda ◽  
Kiyoshi Itatani ◽  
Hiroko Mochizuki ◽  
Ian J. Davies ◽  
Yoshiro Musha ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Calcium Ions ◽  
Dilute Hydrochloric Acid ◽  
Potato Starch ◽  
Carbonate Apatite ◽  
X Ray Diffraction ◽  
Phosphate Powder ◽  
X Ray ◽  
Calcium Phosphate Particles ◽  
Living Bone

The phosphoryl oligosaccharides of calcium (POC), extracted from potato starch, are composed of phosphorus oligosaccharides and calcium ions. Ultrafine calcium phosphate particles, whose main phase was hydroxyapatite (Ca10(PO4)6(OH)2: HAp), could be prepared through the hydrothermal treatment of POC solution at a temperature between 110 and 130°C; X-ray diffraction indicated the crystallinity of HAp in the resulting powder to be poor and similar to that of living bone. The present HAp powder was regarded to be calcium deficient carbonate apatite with the OH- group being partly substituted by a carbonate (CO3 2-) group. The solubility of the resulting powder in dilute hydrochloric acid was higher compared to that of commercially available HAp, suggesting excellent bioabsorbability for the present powder.

Sign in / Sign up

Export Citation Format

Share Document