Dental The number on the handle of a root canal instrument denotes A Length of the instrument in 1/10 of a millimetre B Length of the instrument in millimetres C Diameter at the tip in 1/100 of a millimetre D Diameter at the tip in 1/10 of a millimeter 💡 Explanation The number on the handle of a root canal instrument denotes ✓ Correct Answer: C. Diameter at the tip in 1/100 of a millimetre