Dental Typically rapid palatal expansion is done with a jack screw that is activated at the rate of: A 1.0 to 2.0 mm/week B 1.0 to 2.0 mm/day C 0.5 to 1.0 mm/week D 0.5 to 1.0 mm/day 💡 Explanation Typically rapid palatal expansion is done with a jack screw that is activated at the rate of: ✓ Correct Answer: D. 0.5 to 1.0 mm/day