Location | Material and Calcified Microsphere Ca:P ratio | |||
Preparation | POR | OP | OA | |
Mineral front | Manual crush | 1.53 | 1.67 | 2.59 |
Mineral front | Hydrazine digest | 1.58 | 1.55 | 1.94 |
Subchondral bone | Manual crush | 1.58 | 1.61 | 1.72 |
Subchondral bone | Hydrazine digest | 1.66 | 1.53 | 1.68 |