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Vibrational Spectroscopic Study of Tetracalcium Phosphate in Pure Polycrystalline Form and as a Constituent of a Self-setting Bone Cement by U. Posset; E. Löcklin; R. Thull; W. Kiefer is a Medicine article available to read on EtoBox.

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Polycrystalline tetracalcium phosphate (TTCP), a material of considerable interest for human implantation due to its similarity to hydroxyapatite, was studied by means of Raman and FT-IR spectroscopy. The spectra were interpreted on the basis of group theoretical considerations. In addition, the setting reaction of a calcium phosphate cement (CPC) consisting of an equimolar mixture of TTCP and dicalcium phosphate (DCPA) was investigated by Raman spectroscopy. The band of the totally symmetric phosphate mode 1 of TTCP showed marked factor group splittings. The splitting components arose at coincident wave numbers in the IR and Raman spectra. This observation was in accor-dance with space group P2 1 (factor group C 2 2 , Z = 4). The characteristic splitting of 1 allowed the setting reaction of CPC to hydroxyapatite to be followed. According to the Raman spectroscopic results, considerable amounts of TTCP must be present at the sample surface after 24 h of setting in an aqueous environment.

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Author

U. Posset; E. Löcklin; R. Thull; W. Kiefer

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Heterocorporation; Wiley (ISSN 0021-9304)

Published

1998

Language

EN

Field

Medicine (Health Sciences)