The statement 'When undecalcified bone is to be sectioned, it must be embedded in carbowax' is true.

• A. True
• B. False
• C. Not sure
• D. Optional

Answer: (B)

Undecalcified bone contains mineral that keeps it very hard, so it must be embedded in a medium that provides real rigidity for thin sectioning. Carbowax does not give that level of hardness, so it is not suitable for undecalcified bone. Instead, hard plastic resins such as methyl methacrylate or glycol methacrylate are used to infiltrate and harden the mineralized matrix, allowing thin sections to be cut and examined without decalcification. If decalcification were performed, minerals would be removed and the study of mineralized structure would be lost, which is why the correct approach for undecalcified bone is resin embedding rather than carbowax.