Table 2
Mechanical properties of hydroxyapatite, 45 S5 Bioglass®, glass-ceramics, and human cortical bone
Ceramics	Compression strength (MPa)	Tensile strength (MPa)	Elastic modulus (GPa)	Fracture toughness	Reference
Hydroxyapatite	>400	approximately 40	approximately 100	approximately 1.0	Hench ([1999]), LeGeros and LeGeros ([1999])
45 S5 Bioglass®	approximately 500	42	35	0.5 to 1	Hench ([1999]), Hench and Kokubo ([1998])
A-W	1,080	215 (bend)	118	2.0	Kokubo ([1999b])
Parent glass of A-W	NA	72 (bend)	NA	0.8	Kokubo ([1999b])
Bioverit® I	500	140 to 180 (bend)	70 to 90	1.2 to 2.1	Holand and Vogel ([1993])
Cortical bone	130 to 180	50 to 151	12 to 18	6 to 8	Keaveny and Hayes ([1993]), Moore et al. ([2001]), Nalla et al. ([2003]), Zioupos and Currey ([1998])

NA, not applicable.

Chen et al. Progress in Biomaterials 2012 1:2   doi:10.1186/2194-0517-1-2