The sinterability of manganese oxide (MnO 2 ) doped hydroxyapatite (HA) ranging from 0.05 to 1 wt% was investigated. Green samples were prepared and sintered in air at temperatures ranging from 1000 to 1400 1C. Sintered bodies were characterized to determine the phase stability, grain size, bulk density, hardness, fracture toughness and Young's modulus. XRD analysis revealed that the HA phase stability was not disrupted throughout the sintering regime employed. In general, samples containing less than 0.5 wt% MnO 2 and when sintered at lower temperatures exhibited higher mechanical properties than the undoped HA. The study revealed that all the MnO 2 -doped HA achieved 499% relative density when sintered at 1100-1250 1C as compared to the undoped HA which could only attained highest value of 98.9% at 1150 1C. The addition of 0.05 wt% MnO 2 was found to be most beneficial as the samples exhibited the highest hardness of 7.58 GPa and fracture toughness of 1.65 MPam 1/2 as compared to 5.72 GPa and 1.22 MPam 1/2 for the undoped HA when sintered at 1000 1C. Additionally, it was found that the MnO 2 -doped samples attained E values above 110 GPa when sintered at temperature as low as 1000 1C if compared to 1050 1C for the undoped HA. r