The aim of this work was to study the phase transformation during the setting reaction of two calcium phosphate bone cements based on either alpha tricalcium phosphate (±-TCP) or tetracalcium phosphate (TetCP) initial solid phase, and a magnesium carbonatephosphoric acid solution as the hardening liquid. Low molecular weight (38.2 kDa) chitosan was used to retard the cements setting reaction. To follow the kinetics of the phase development, an energy dispersive X-ray diffraction technique was applied. This technique allowed the collection of diffraction patterns from the cement pastes in situ starting from 1 min of the setting process. In the case of the TetCP-based cement, the appearance and evolution of an intermediate phase was detected.
Energy dispersive X-ray diffraction study of phase development during hardening of calcium phosphate bone cements with addition of chitosan
Generosi A;Ferro D;
2008
Abstract
The aim of this work was to study the phase transformation during the setting reaction of two calcium phosphate bone cements based on either alpha tricalcium phosphate (±-TCP) or tetracalcium phosphate (TetCP) initial solid phase, and a magnesium carbonatephosphoric acid solution as the hardening liquid. Low molecular weight (38.2 kDa) chitosan was used to retard the cements setting reaction. To follow the kinetics of the phase development, an energy dispersive X-ray diffraction technique was applied. This technique allowed the collection of diffraction patterns from the cement pastes in situ starting from 1 min of the setting process. In the case of the TetCP-based cement, the appearance and evolution of an intermediate phase was detected.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
