Dental For a dental hand instrument with a formula of 10-8.5-8-14, the number 10 refers to ________. A The width of the blade in tenths of a millimeter B The primary cutting edge angle in centigrades C The blade length in millimeters D The blade angle in centigrades 💡 Explanation For a dental hand instrument with a formula of 10-8.5-8-14, the number 10 refers to ________. ✓ Correct Answer: A. The width of the blade in tenths of a millimeter