Final answer:
The residual calcium levels of demineralized bone shall not exceed 5%.
Step-by-step explanation:
The residual calcium levels of demineralized bone shall not exceed 5%. When bone undergoes demineralization, which is the loss of minerals such as calcium, there is a limit to how much residual calcium should remain. Exceeding this limit can indicate an imbalance in calcium homeostasis, which is essential for various physiological processes in the body.