Dental The edge of a cutting hand instrument is rested on a dental tray, which causes it to slide. What does this determine? A The instrument is unbalanced B The instrument is dull C The instrument is very heavy D The instrument needs to be replaced 💡 Explanation The edge of a cutting hand instrument is rested on a dental tray, which causes it to slide. What does this determine? ✓ Correct Answer: B. The instrument is dull