Ion exchange resin and electrolyte methods of decalcification fall under the broad heading of acid methods.

• A. True
• B. False
• C. Not applicable
• D. Only for certain bones

Answer: (A)

The key idea is that acid methods rely on producing an acidic environment to dissolve the mineral content of bone. Ion exchange resin decalcification typically uses a resin in the hydrogen (H+) form; calcium ions are exchanged for hydrogen ions, which lowers the local pH and promotes dissolution of calcium phosphate minerals. Electrolytic (electrolyte) decalcification generates acid at the electrode during operation, creating an acidic environment that dissolves the mineral phase. Because both approaches achieve decalcification through acidification, they are categorized under acid methods. In contrast, non-acid approaches like chelation (for example, EDTA) remove minerals without creating an acidic environment, so they fall outside this category.