Which bone cutting instrument has a cutting edge and is bevelled on both sides?

• A. Gigli saw
• B. Osteotome
• C. Chisel
• D. Rongeur

Answer: (B)

The key idea is how the blade is shaped to cut bone. The instrument designed for precise bone cutting and shaping uses a blade that has a cutting edge and is ground so both sides are beveled. That double bevel lets the blade bite cleanly into bone and be driven with a mallet to create controlled, straight cuts or splits, which is exactly what an osteotome is built to do.

Gigli saw is a flexible wire with teeth used to saw through bone, not a solid cutting edge with a double bevel. A chisel typically has a bevel on one side to shave or parry bone, but not the symmetrical double bevel described. A rongeur works like a scissor with sharp jaws to bite away bone, not a single cutting edge blade with bevels on both faces.