Dissolution mechanism of zinc phosphate dental cement in acetic and lactic acid buffers.
When zinc phosphate cement was immersed in 0.1 M acetic and lactic acid buffer solutions adjusted to pH 4.1, its dissolution rate was determined by chemical analysis. The eroded surface of the cement was examined by X-ray diffraction and SEM observation. The dissolution process of the cement immersed in the acetic acid buffer solution was mainly controlled by the diffusion of releasing species through the cement matrix and that of the cement immersed in the lactic acid buffer solution by the decomposition of the cement matrix at the surface.
Second Department of Conservative Dentistry, Faculty of Dentistry, Kyushu University 61, Fukuoka, Japan.
H
H
Murakami
Y
Y
Matsuya
S
S
Matsuya
D000085:Acetates / Q000737:chemistry*; D019342:Acetic Acid; D001673:Biodegradation, Environmental; D002021:Buffers; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000737:chemistry*; D019344:Lactic Acid; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties; D015036:Zinc Phosphate Cement / Q000737:chemistry*
D000085:Acetates; D002021:Buffers; D007773:Lactates; D019344:Lactic Acid; D015036:Zinc Phosphate Cement; D019342:Acetic Acid