Systematic Assessment of Synthesized Tri-magnesium Phosphate Powders (Amorphous, Semi-crystalline and Crystalline) and Cements for Ceramic Bone Cement Applications

Ostrowski, Nicole; Sharma, Vidisha; Roy, Abhijit; Kumta, Prashant N.

doi:10.1016/j.jmst.2014.12.002

Cited by 26 publications

(19 citation statements)

References 38 publications

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“…37,38 EDS analysis (Table 3) showed that sodium ions had no role in the precipitation due to its replacement by Ca 2+ ions in the surfactant molecules. The XRD pattern of the precipitate resembled that of a semicrystalline material as the hump in the background with peaks could be clearly seen 55 (Figure 3b). On the contrary, clear and sharp peaks were visible for SDS due to its crystalline nature.…”

Section: Effect Of Sds Concentration On Iftmentioning

confidence: 85%

Effect of Monovalent and Divalent Salts on the Interfacial Tension of n-Heptane against Aqueous Anionic Surfactant Solutions

2017

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A very low interfacial tension, γ, can be achieved between an oil phase and an aqueous solution containing anionic surfactant and salt at a very low concentration. This phenomenon can have potential applications in recovering residual oil from the reservoir through low salinity–low surfactant enhanced oil recovery flooding. Measurements of γ between n-heptane and aqueous solution of anionic surfactants in the concentration range of 0.141–2.167 mM and salts in the concentration range of 9.010–119.780 mM at 313.15 ± 0.1 K have been carried out. The experimental results show that the value of γ falls to a lowest value at a temperature above the Krafft point when the concentration of anionic surfactants [sodium dodecyl sulfate (SDS) and dioctyl sulfosuccinate sodium salt (AOT)] is increased up to a maximum surface excess concentration in an aqueous solution in the presence of monovalent [sodium chloride, (NaCl)] and divalent [calcium chloride, (CaCl2)] salts in the low concentration range. To understand and adequately capture the reduction of γ in such systems with n-heptane as an oil phase, a simplistic model is being proposed here. This model is an extension of the Petersen and Saykally model which was earlier developed to capture the Jones-Ray effect.

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Section: Effect Of Sds Concentration On Iftmentioning

confidence: 85%

Effect of Monovalent and Divalent Salts on the Interfacial Tension of n-Heptane against Aqueous Anionic Surfactant Solutions

2017

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“…The typical starting materials for MPCs is MgO or TMPA ceramic powder reacted with water-soluble monatomic or diatomic phosphate salts of ammonium, potassium or sodium. ,,, These precursors typically result in newberyite (MgHPO 4 ·3H 2 O, Nb), struvite (MgNH 4 PO 4 ·6H 2 O, Sv), Sv analogs, or amorphous products with unreacted precursors. ,, A variety of proposed chemical reactions between MgO or TMPA and phosphate salts can be seen in Table . A few less stable phases, such as schertelite (Mg(NH 4 HPO 4 ) 2 ·4H 2 O, Sh) and hannayite (Mg 3 (NH 4 ) 2 (HPO 4 ) 4 ·8H 2 O, Hn) may be formed as well. ,,, Table contains a summary of cement compositions noted in the field of biomedical magnesium cements. Most researchers note varying levels of unreacted MgO or TMPA powder within the resulting cement structure.…”

Section: Materials Propertiesmentioning

confidence: 99%

Magnesium Phosphate Cement Systems for Hard Tissue Applications: A Review

Ostrowski

Roy

Kumta

2016

ACS Biomater. Sci. Eng.

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167

154

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In the search for more ideal bone graft materials for clinical application, the investigation into ceramic bone cements or bone void filler is ongoing. Calcium phosphate-based materials have been widely explored and implemented for medical use in bone defect repair. Such materials are an excellent choice because the implant mimics the natural chemistry of mineralized bone matrix and in injectable cement form, can be implemented with relative ease. However, of the available calcium phosphate cements, none fully meet the ideal standard, displaying low strengths and acidic setting reactions or slow setting times, and are often very slow to resorb in vivo. The study of magnesium phosphates for bone cements is a relatively new field compared to traditional calcium phosphate bone cements. Although reports are more limited, preliminary studies have shown that magnesium phosphate cements (MPC) may be a strong alternative to calcium phosphates for certain applications. The goal of the present publication is to review the history and achievements of magnesium phosphate-based cements or bone void fillers to date, assess how these cements compare with calcium phosphate competitors and to analyze the future directions and outlook for the research, development, and clinical implementation of these cements.

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“…It does not elicit an obvious foreign body response after implantation in the human body. Thus, it has wide application prospects in unstable fracture treatment and artificial joint prosthesis bond fixation . This study shows that composite calcium phosphate cements and MPBCs have good biocompatibility and osteogenic in vivo .…”

Section: Introductionmentioning

confidence: 83%

Affecting mechanism of chitosan on water resistance of magnesium phosphate cement

Liao

Duan

et al. 2017

Int J Applied Ceramic Tech

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To solve the problem of poor water resistance and restricted usage of magnesium phosphate cement, the cement prepared by NaH 2 PO 4 and NH 4 H 2 PO 4 was modified via chitosan, and the modification mechanism was also explored. The results showed that the optimum molar ratio of NaH 2 PO 4 : NH 4 H 2 PO 4 was 2:3. Upon setting the chitosan content of wt.1%, the mechanical strength of the resulting cements after 28 days was 42 MPa. After water immersion, the percentage of the lost mechanical strength of cements and mass loss was smaller than those in the control group. Free amino group on the molecular chain of chitosan could react with Mg 2+ ions to form complexes. Interconnected polymer network structure was formed in magnesium phosphate bone cement paste. Magnesium phosphate bone cement had hydration products with Mg 2+ ions as nucleation sites, which further gradually formed a network structure, indicating that chitosan could improve the water resistance of magnesium phosphate bone cements. K E Y W O R D S cement, degradation, magnesium oxide, phosphate

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Systematic Assessment of Synthesized Tri-magnesium Phosphate Powders (Amorphous, Semi-crystalline and Crystalline) and Cements for Ceramic Bone Cement Applications

Cited by 26 publications

References 38 publications

Effect of Monovalent and Divalent Salts on the Interfacial Tension of n-Heptane against Aqueous Anionic Surfactant Solutions

Effect of Monovalent and Divalent Salts on the Interfacial Tension of n-Heptane against Aqueous Anionic Surfactant Solutions

Magnesium Phosphate Cement Systems for Hard Tissue Applications: A Review

Affecting mechanism of chitosan on water resistance of magnesium phosphate cement

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