Table 1.

Classification of the calcium phosphate compounds.

CP Compound	Abbreviation	Chemical Formula	Ca/P
Dicalcium phosphate dehydrate	DCPD	Ca (HPO4)2∙H2O	1.00
Octacalcium phosphate	OCP	Ca8H2(PO4)6∙5H2O	1.33
Tricalcium phosphate	α-TCP β-TCP	Ca3(PO4)	1.50
Hydroxyapatite	HA	Ca10(PO4)6(OH)2	1.67
Amorphous calcium phosphate	ACP	CaHPO4∙nH2O	–