Dental According to ADA specification #1 for amalgam, what is the acceptable dimensional change? A -20 to +20 micron/cm B -10 to +10 micron/cm C -20 to +10 micron/cm D -10 to +20 micron/cm 💡 Explanation According to ADA specification #1 for amalgam, what is the acceptable dimensional change? ✓ Correct Answer: A. -20 to +20 micron/cm