Strengthening of calcium phosphate cement by compounding calcium carbonate whiskers.
Dent Mater J
; 24(1): 104-10, 2005 Mar.
Article
em En
| MEDLINE
| ID: mdl-15881216
ABSTRACT
The purpose of this study was to investigate how aragonite (calcium carbonate) whiskers influenced the strengthening and carbonating of alpha-tricalcium phosphate (alpha-TCP) based calcium phosphate cement. Aragonite whiskers of 0.95 microm width with an aspect ratio of 6.6 were prepared. The cement powder, alpha-TCP containing 0-50 mass% aragonite whisker, was mixed with 0.6 mol/L NaH2PO4 solution and incubated at 37 degrees C and 100% relative humidity. Diametral tensile strength (DTS) value increased significantly when appropriate amount of aragonaite whiskers was added. For example, DTS value of set cement containing 20 mass% aragonite whisker was 5.8 +/- 0.5 MPa, whereas DTS value of set cement containing no whiskers was 1.3 +/- 0.2 MPa after 1-week incubation. SEM observation revealed that the shape of the whiskers and the densification of the structure could have contributed to the strengthening of the set cement. Moreover, FTIR spectra implied that a bone-like carbonated apatite was precipitated in the cement. The results obtained in the present study revealed that the shape as well as any slight dissolution of aragonite whiskers could contribute to improving the properties of a-TCP based calcium phosphate cement.
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Base de dados:
MEDLINE
Assunto principal:
Carbonato de Cálcio
/
Fosfatos de Cálcio
/
Cimentos Dentários
Idioma:
En
Revista:
Dent Mater J
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Japão