Kinetics and Mechanism of Hydroxyapatite Crystal Dissolution in Weak Acid Buffers Using the Rotating Disk Method

Maw Sheng wu; William I. Higuchi; Jeffrey L. Fox; Michael Friedman

doi:10.1177/00220345760550033201

Kinetics and Mechanism of Hydroxyapatite Crystal Dissolution in Weak Acid Buffers Using the Rotating Disk Method

Maw Sheng wu, William I. Higuchi, Jeffrey L. Fox, Michael Friedman

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

The dissolution rates of synthetic hydroxyapatite pellets under sink conditions were measured using the rotating disk method. The experimental data were analyzed by means of a physical model that yielded an ionic activity product of K_HAP = a¹⁰ _Ca2+ a⁶ PO₄ ^3- a² _OH- = 1 × 10^-124.5±1.0 that was found to govern the dissolution reaction. Also, a surface resistance factor of k' equal to about 174 sec/cm was deduced from the data.

Original language	English
Pages (from-to)	496-505
Number of pages	10
Journal	Journal of Dental Research
Volume	55
Issue number	3
DOIs	https://doi.org/10.1177/00220345760550033201
State	Published - May 1976
Externally published	Yes

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title = "Kinetics and Mechanism of Hydroxyapatite Crystal Dissolution in Weak Acid Buffers Using the Rotating Disk Method",

abstract = "The dissolution rates of synthetic hydroxyapatite pellets under sink conditions were measured using the rotating disk method. The experimental data were analyzed by means of a physical model that yielded an ionic activity product of KHAP = a10 Ca2+ a6 PO4 3- a2 OH- = 1 × 10-124.5±1.0 that was found to govern the dissolution reaction. Also, a surface resistance factor of k' equal to about 174 sec/cm was deduced from the data.",

author = "wu, {Maw Sheng} and Higuchi, {William I.} and Fox, {Jeffrey L.} and Michael Friedman",

year = "1976",

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AB - The dissolution rates of synthetic hydroxyapatite pellets under sink conditions were measured using the rotating disk method. The experimental data were analyzed by means of a physical model that yielded an ionic activity product of KHAP = a10 Ca2+ a6 PO4 3- a2 OH- = 1 × 10-124.5±1.0 that was found to govern the dissolution reaction. Also, a surface resistance factor of k' equal to about 174 sec/cm was deduced from the data.

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Kinetics and Mechanism of Hydroxyapatite Crystal Dissolution in Weak Acid Buffers Using the Rotating Disk Method

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