Interdependence of Anion and Cation Exchanges in Calcium Hydroxyapatite: Pb2+ and Cl−

Sugiyama, Shigeru; Fukuda, Nobuhiro; Matsumoto, Hironori; Hayashi, Hiromu; Shigemoto, Naoya; Hiraga, Yuki; Moffat, J.B.

doi:10.1006/jcis.1999.6510

Cited by 29 publications

(13 citation statements)

References 15 publications

(11 reference statements)

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“…In a second ion exchange theory, metal ions that are adsorbed to the surface of the apatite particle will substitute Ca 2+ ions from the apatite lattice by a diffusion process [22][23][24][25][26][27].…”

Section: Discussionmentioning

confidence: 99%

Ion adsorption behaviour of hydroxyapatite with different crystallinities

Stötzel

Müller

Reinert

et al. 2009

Colloids and Surfaces B: Biointerfaces

149

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Section: Discussionmentioning

confidence: 99%

Ion adsorption behaviour of hydroxyapatite with different crystallinities

Stötzel

Müller

Reinert

et al. 2009

Colloids and Surfaces B: Biointerfaces

149

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“…Earlier research has shown, however, that HAp dissolution is not inhibited by the incorporation of Cl -ions into HAp through either ion exchange or adsorption in an ambient aqueous solution [Sugiyama et al, 1999]. Therefore, it was suggested that the inhibition of dissolution of HAp by Na + and Cl -could be the result of a competition for HAp surface protonation sites between Na + and H + ions [Kwon et al, 2009].…”

Section: Discussionmentioning

confidence: 99%

Effect of Salivary Factors on the Susceptibility of Hydroxyapatite to Early Erosion

Jager¹,

Vieira²,

Ligtenberg

et al. 2011

Caries Res

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Objective: Salivary pellicle is known to reduce the erosion of enamel and differences in the level of protection exist between individual saliva sources, but which parameters or components are important is not known. The focus of this study was to investigate the relationship between saliva parameters and early erosion of hydroxyapatite (HAp) with an in situ grown saliva film. Methods: Twenty-eight volunteers carried two HAp and one porcelain discs in their buccal sulcus for 1.5 h. Next, the discs covered with pellicle and the attached saliva film were exposed extraorally to 50 mM (pH = 3) citric acid for 2 min and unstimulated and stimulated saliva was collected. Calcium loss from HAp after erosive challenge was measured, corrected for calcium loss from pellicle on porcelain discs and averaged. Several salivary parameters were analysed. Pearson’s linear correlation and multiple regression analysis were used to study the relation between saliva parameters and HAp erosion. Results: Significant correlations were found between HAp erosion and the concentration of phosphorus in unstimulated saliva (r = 0.40, p = 0.03) and between HAp erosion and the concentration of sodium (r = –0.40, p = 0.03), chloride (r = –0.47, p = 0.01), phosphorus (r = 0.45, p = 0.01) and flow (r = –0.39, p = 0.04) of stimulated saliva. Multivariate analysis revealed a significant role in the HAp erosion for sodium, urea, total protein, albumin, pH and flow of unstimulated saliva and for sodium, potassium, urea, and phosphorus of stimulated saliva. Conclusions: Several salivary parameters are associated with the susceptibility of HAp to erosion.

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“…Apart from alkaline earth ions, many divalent ions have been reported to interact with hydroxyapatite. These include Cd [36,[40][41][42][43], Co [43,44], Cu [41,[43][44][45], Mn [44,46,47], Ni [36,48], Pb [41][42][43][44]49], and Zn [36,43,50,51]. Three of these ions were selected for further analysis: Zn, Cu, and Ni.…”

Section: Activation Mechanismmentioning

confidence: 99%

Design of an inorganic dual-paste apatite cement using cation exchange

Bohner

Tiainen

Michel

et al. 2015

J Mater Sci: Mater Med

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The use of hydraulic calcium phosphate cements (CPCs) as bone substitute is impaired by their relatively poor handling due to the need to mix a powder and a liquid during surgery. The aim of the present study was to assess the possibility to design CPCs as inorganic dual-paste cements, where both pastes would be stable for years, but would react as soon as they are mixed together. Results showed that aqueous pastes of α-tricalcium phosphate (α-TCP) powder could be stabilized for up to a year at room temperature by the use of 0.1 M Mg chloride solution. Adding a calcium chloride solution in a 1:4 volume ratio activated α-TCP pastes provided the Ca/Mg ratio was larger than one. Mechanistic investigations suggest that Ca ions can displace Mg cations adsorbed at the surface of α-TCP particles to initiate α-TCP transformation to calcium-deficient hydroxyapatite and concomitant paste hardening. The compressive strength (29 MPa) was similar to that of commercial formulations (5-80 MPa). Other divalent cations (Ba, Ni, Sr) had a similar effect although with a different degree of efficacy.

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Interdependence of Anion and Cation Exchanges in Calcium Hydroxyapatite: Pb2+ and Cl−

Cited by 29 publications

References 15 publications

Ion adsorption behaviour of hydroxyapatite with different crystallinities

Ion adsorption behaviour of hydroxyapatite with different crystallinities

Effect of Salivary Factors on the Susceptibility of Hydroxyapatite to Early Erosion

Design of an inorganic dual-paste apatite cement using cation exchange

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