scholarly journals Dental glass-reinforced composite for caries inhibition: Calcium phosphate ion release and mechanical properties

2009 ◽  
Vol 9999B ◽  
pp. NA-NA
Author(s):  
Hockin H. K. Xu ◽  
Jennifer L. Moreau
Keyword(s):  
Mechanical Properties ◽  
Calcium Phosphate ◽  
Ion Release ◽  
Phosphate Ion ◽  
Reinforced Composite

Mechanical properties and ion release from bioactive restorative composites containing glass fillers and calcium phosphate nano-structured particles

2015 ◽  
Vol 31 (6) ◽  
pp. 726-733 ◽  
Author(s):  
Marina D.S. Chiari ◽  
Marcela C. Rodrigues ◽  
Tathy A. Xavier ◽  
Eugen M.N. de Souza ◽  
Victor E. Arana-Chavez ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Phosphate ◽  
Ion Release ◽  
Restorative Composites ◽  
Glass Fillers

Weight loss, ion release and initial mechanical properties of a binary calcium phosphate glass fibre/PCL composite

2008 ◽  
Vol 4 (5) ◽  
pp. 1307-1314 ◽  
Author(s):  
I. Ahmed ◽  
A.J. Parsons ◽  
G. Palmer ◽  
J.C. Knowles ◽  
G.S. Walker ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Calcium Phosphate ◽  
Phosphate Glass ◽  
Glass Fibre ◽  
Ion Release

scholarly journals Novel multifunctional dental bonding agent for class-V restorations to inhibit periodontal biofilms

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 29004-29014 ◽  
Author(s):  
Lin Wang ◽  
Chunyan Li ◽  
Michael D. Weir ◽  
Ke Zhang ◽  
Yanmin Zhou ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Bonding Agent ◽  
Ion Release ◽  
Class V ◽  
Dental Bonding ◽  
Phosphate Ion

We recently developed a dental bonding agent to bond restorations to teeth using nanoparticles of amorphous calcium phosphate (NACP) for remineralization with rechargeable calcium and phosphate ion release.

Mechanical properties and ion release of composites containing calcium phosphate

2016 ◽  
Vol 32 ◽  
pp. e14
Author(s):  
M.D.S. Chiari ◽  
M.C. Rodrigues ◽  
Y.A. Salazar ◽  
L.C. Natale ◽  
R.R. Braga
Keyword(s):  
Mechanical Properties ◽  
Calcium Phosphate ◽  
Ion Release

scholarly journals Ion release and recharge from a fissure sealant containing amorphous calcium phosphate

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241272
Author(s):  
Mahtab Memarpour ◽  
Neda Afzali Baghdadabadi ◽  
Azade Rafiee ◽  
Mehrdad Vossoughi
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Calcium Ion ◽  
Ion Release ◽  
Three Solutions ◽  
Fissure Sealant ◽  
Phosphate Ion ◽  
Phosphate Ions ◽  
Release Capacity ◽  
Casein Phosphopeptide

To assess- the release of calcium and phosphate ions from a fissure sealant containing amorphous calcium phosphate (ACP), and to determine the re-release capacity of these ions when charged with a solution containing casein phosphopeptide-amorphous calcium phosphate (CPP-ACP). Nine blocks of ACP resin-based sealant were prepared and immersed in three solutions at different pH (4.0, 5.5, 7.0), and calcium and phosphate ion release was measured with ion chromatography at 1, 3, 5, 7, 14, 21 and 28 days after immersion. Sixty days after immersion, each block was charged with CPP-ACP solution in three 7-day cycles to investigate the re-release of these ions, which was measured on days 1, 3, and 7. No difference was observed in initial calcium ion release at pH 4.0 and pH 5.5. At both values, ion release was significantly higher than at pH 7.0 (p<0.001). Initial phosphate release was significantly different among the three pH values (p<0.001). After re-charging the specimens, calcium ion re-release was greater than phosphate ion release. Initial ion release from ACP resin-based sealant was greatest at the lowest pH. Ion release decreased with time. As the number of recharge cycles increased, ion re-release also improved. Phosphate ion re-release required more recharge cycles than calcium ion re-release.

scholarly journals The preparation and application of calcium phosphate biomedical composites in filling of weight-bearing bone defects

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lijia Cheng ◽  
Tianchang Lin ◽  
Ahmad Taha Khalaf ◽  
Yamei Zhang ◽  
Hongyan He ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Phosphate ◽  
Tricalcium Phosphate ◽  
Weight Bearing ◽  
Bone Defects ◽  
Type I ◽  
Artificial Bone ◽  
Thermosensitive Hydrogel ◽  
Bone Repairing ◽  
Histological Staining

AbstractNowadays, artificial bone materials have been widely applied in the filling of non-weight bearing bone defects, but scarcely ever in weight-bearing bone defects. This study aims to develop an artificial bone with excellent mechanical properties and good osteogenic capability. Firstly, the collagen-thermosensitive hydrogel-calcium phosphate (CTC) composites were prepared as follows: dissolving thermosensitive hydrogel at 4 °C, then mixing with type I collagen as well as tricalcium phosphate (CaP) powder, and moulding the composites at 37 °C. Next, the CTC composites were subjected to evaluate for their chemical composition, micro morphology, pore size, Shore durometer, porosity and water absorption ability. Following this, the CTC composites were implanted into the muscle of mice while the 70% hydroxyapatite/30% β-tricalcium phosphate (HA/TCP) biomaterials were set as the control group; 8 weeks later, the osteoinductive abilities of biomaterials were detected by histological staining. Finally, the CTC and HA/TCP biomaterials were used to fill the large segments of tibia defects in mice. The bone repairing and load-bearing abilities of materials were evaluated by histological staining, X-ray and micro-CT at week 8. Both the CTC and HA/TCP biomaterials could induce ectopic bone formation in mice; however, the CTC composites tended to produce larger areas of bone and bone marrow tissues than HA/TCP. Simultaneously, bone-repairing experiments showed that HA/TCP biomaterials were easily crushed or pushed out by new bone growth as the material has a poor hardness. In comparison, the CTC composites could be replaced gradually by newly formed bone and repair larger segments of bone defects. The CTC composites trialled in this study have better mechanical properties, osteoinductivity and weight-bearing capacity than HA/TCP. The CTC composites provide an experimental foundation for the synthesis of artificial bone and a new option for orthopedic patients.

Clay-based nanocomposite hydrogel with attractive mechanical properties and sustained bioactive ion release for bone defect repair

2021 ◽  
Author(s):  
Xinyun Zhai ◽  
Changshun Ruan ◽  
Jie Shen ◽  
Chuping Zheng ◽  
Xiaoli Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Defect ◽  
Nanocomposite Hydrogel ◽  
Ion Release ◽  
Bone Defect Repair ◽  
Defect Repair ◽  
Gradual Release

Using nanoclay as the physical crosslinker, a novel clay-based nanocomposite hydrogel with attractive mechanical properties has be obtained, and the gradual release of intrinsic Mg2+ and Si4+ endows the system with excellent osteogenesis.

scholarly journals Mechanochemical Synthesis and Rapid Consolidation of Nanocrystalline 3NiAl-Al2O3Composites

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
In-Jin Shon ◽  
In-Yong Ko ◽  
Seung-Hoon Jo ◽  
Jung-Mann Doh ◽  
Jin-Kook Yoon ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Mechanochemical Synthesis ◽  
High Frequency ◽  
Nanocrystalline Materials ◽  
Physical And Mechanical Properties ◽  
High Energy ◽  
Reinforced Composite ◽  
Energy Ball ◽  
High Frequency Induction

Nanopowders of 3NiAl and Al2O3were synthesized from 3NiO and 5Al powders by high-energy ball milling. Nanocrystalline Al2O3reinforced composite was consolidated by high-frequency induction-heated sintering within 3 minutes from mechanochemically synthesized powders of Al2O3and 3NiAl. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition grain growth. Nanocrystalline materials have received much attention as advanced engineering materials with improved physical and mechanical properties. The relative density of the composite was 97%. The average Vickers hardness and fracture toughness values obtained were 804 kg/mm2and 7.5 MPa⋅m1/2, respectively.

Synthesis of Alpha-Tricalcium Phosphate by Wet Reaction and Evaluation of Mechanical Properties

2012 ◽  
Vol 727-728 ◽  
pp. 1164-1169 ◽  
Author(s):  
Mônica Beatriz Thürmer ◽  
Rafaela Silveira Vieira ◽  
Juliana Machado Fernandes ◽  
Wilbur Trajano Guerin Coelho ◽  
Luis Alberto Santos
Keyword(s):  
Mechanical Properties ◽  
Calcium Phosphate ◽  
Tricalcium Phosphate ◽  
Calcium Nitrate ◽  
Chemical Precipitation ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Calcium Phosphate Cements

Calcium phosphate cements have bioactivity and osteoconductivity and can be molded and replace portions of bone tissue. The aim of this work was to study the obtainment of α-tricalcium phosphate, the main phase of calcium phosphate cement, by wet reaction from calcium nitrate and phosphoric acid. There are no reports about α-tricalcium phosphate obtained by this method. Two routes of chemical precipitation were evaluated and the use of two calcinations temperatures to obtain the phase of cement. The influence of calcination temperature on the mechanical properties of cement was evaluated. Cement samples were characterized by particle size analysis, X-ray diffraction, mechanical strength and scanning electron microscopy. The results demonstrate the strong influence of synthesis route on the crystalline phases of cement and the influence of concentration of reactants on the product of the reaction, as well as, on the mechanical properties of cement.

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