Osteocyte viability in different regions of the bone core.(A) LDH positive osteocytes per mm2 in T0, unloaded and mechanically stimulated bone cores at 0.1, 0.5, 1.0 and 2.5 mm from the core surface after 3 days in culture (n=4 cores per group, Patient 6; Male 75 years). (B) As above, in cores after 7 days in culture (n=4 cores per group, Patient 3; Male 46 years).