TY - JOUR
T1 - Ionic interaction with bone mineral IV. Varying affinity of synthetic calcium phosphates for Ca2+
AU - Pak, Charles Y C
AU - Skinner, H. Catherine W
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1968/9/3
Y1 - 1968/9/3
N2 - The concentration of Ca2+ and PO43- in the liquid film surrounding the crystals of several synthetic calcium phosphates suspended in an aqueous medium was calculated from 45Ca2+ and 32PO43- exchange studies performed under physiological conditions. This permitted an estimation of the uptake of Ca2+ and PO43- from solution by the solid phase alone, exclusive of the uptake by the adherent liquid film. The compounds with low calcium-to-phosphate molar ratio (Ca/P) showed a greater affinity for Ca2+ than those with higher Ca/P. Octacalcium phosphate (Ca/P = 1.33) incorporated considerably more Ca2+ than PO43-. Tricalcium phosphate (Ca/P = 1.5), Bio-Rad apatite (Ca/P = 1.51), G-D apatite (Ca/P = 1.63), and L-apatite (Ca/P = 1.67), all of which gave apatitic X-ray diffraction patterns, demonstrated an uptake of Ca2+ in decreasing order, and an uptake of PO43- in increasing order.
AB - The concentration of Ca2+ and PO43- in the liquid film surrounding the crystals of several synthetic calcium phosphates suspended in an aqueous medium was calculated from 45Ca2+ and 32PO43- exchange studies performed under physiological conditions. This permitted an estimation of the uptake of Ca2+ and PO43- from solution by the solid phase alone, exclusive of the uptake by the adherent liquid film. The compounds with low calcium-to-phosphate molar ratio (Ca/P) showed a greater affinity for Ca2+ than those with higher Ca/P. Octacalcium phosphate (Ca/P = 1.33) incorporated considerably more Ca2+ than PO43-. Tricalcium phosphate (Ca/P = 1.5), Bio-Rad apatite (Ca/P = 1.51), G-D apatite (Ca/P = 1.63), and L-apatite (Ca/P = 1.67), all of which gave apatitic X-ray diffraction patterns, demonstrated an uptake of Ca2+ in decreasing order, and an uptake of PO43- in increasing order.
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U2 - 10.1016/0304-4165(68)90055-X
DO - 10.1016/0304-4165(68)90055-X
M3 - Article
C2 - 5683526
AN - SCOPUS:0014402069
SN - 0304-4165
VL - 165
SP - 274
EP - 282
JO - BBA - General Subjects
JF - BBA - General Subjects
IS - 2
ER -