Molecular Tectonics:  Abiotic Control of Hydroxyapatite Crystals Morphology

2002 ◽  
Vol 2 (6) ◽  
pp. 489-492 ◽  
Author(s):  
Vincent Ball ◽  
Jean-Marc Planeix ◽  
Olivier Félix ◽  
Joseph Hemmerlé ◽  
Pierre Schaaf ◽  
...  
Keyword(s):  
Molecular Tectonics ◽  
Abiotic Control ◽  
Hydroxyapatite Crystals

Molecular Tectonics. Disruption of Self-Association in Melts Derived from Hydrogen-Bonded Solids

2004 ◽  
Vol 37 (19) ◽  
pp. 7351-7357 ◽  
Author(s):  
Danielle Boils ◽  
Marie-Ève Perron ◽  
Francis Monchamp ◽  
Hugues Duval ◽  
Thierry Maris ◽  
...  
Keyword(s):  
Molecular Tectonics ◽  
Self Association ◽  
Hydrogen Bonded

Protective Effect of Solutions Containing Polymers Associated with Fluoride and Stannous Chloride on Hydroxyapatite Dissolution

2021 ◽  
pp. 1-8
Author(s):  
Marina Gullo Augusto ◽  
Tamires Maria de Andrade Santos ◽  
Taís Scaramucci ◽  
Idalina Vieira Aoki ◽  
Carlos Rocha Gomes Torres ◽  
...  
Keyword(s):  
Protective Effect ◽  
Sodium Fluoride ◽  
Stannous Chloride ◽  
Deionized Water ◽  
Lower Amount ◽  
Citric Acid Solution ◽  
Solution Ph ◽  
Methacrylate Copolymer ◽  
Total Reaction Time ◽  
Hydroxyapatite Crystals

This study investigated the protective effect of experimental solutions containing 4 polymers (polyoxirane, hydroxypropylmethylcellulose [HPMC], pectin, and an amino methacrylate copolymer [AMC]) in 2 concentrations (low and high) associated or not with sodium fluoride (F; 225 ppm F<sup>–</sup>) or sodium fluoride plus stannous chloride (FS; 800 ppm Sn<sup>2+</sup>) on the dissolution of hydroxyapatite crystals (HA). Deionized water was the control. The pretreated HA was added to a 0.3% citric acid solution (pH 3.8). An automatic titrant machine added aliquots of 0.1 N HCl at a rate of 28 μL/min, in a total reaction time of 5 min. Groups were compared with 2-way ANOVA and Tukey’s test, and concentrations with Student <i>t</i> test (5%). The zeta potential of the HA treated with the solutions was measured. Significant differences were found for both factors and interaction (<i>p</i> &#x3c; 0.0001). The treatments with F and FS solutions resulted in a lower amount of dissolved HA than the control. Among the polymers’ solutions, only AMC was able to reduce the amount of dissolved HA, changing the surface charge of HA to positive. AMC improved the protective effect of F, but it did not affect FS. Polyoxirane and HPMC reduced the protective potential of the FS solution. No differences were found between the concentrations of the polymers. It was concluded that F and FS reduced the amount of dissolved HA. The protective effect of the experimental solutions against HA dissolution was polymer dependent. The F effect was enhanced by its combination with AMC, but the protection of FS was impaired by polyoxirane and HPMC.

Competition between oxytetracycline and citrate for binding sites on hydroxyapatite crystals

1967 ◽  
Vol 1 (1) ◽  
pp. 243-245 ◽  
Author(s):  
Kenneth H. Ibsen ◽  
Marshall R. Urist ◽  
Satsuki Uyeno ◽  
Russell L. Sanders
Keyword(s):  
Binding Sites ◽  
Hydroxyapatite Crystals
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