<prompt> Which one of the following dental cement accelerates the formation of reparative dentin?EugenolCalcium hydroxideZinc oxideSilica  <response>: BIOLOGICAL PROPERTIES OF CaOH2 :Effect on pulp:The cement is alkaline in nature. The high pH is due to the presence of free CaOH2 in the set cement. The pH ranges from 9.2 to 11.7Formation of secondary dentin: The high alkalinity and its consequent antibacterial and protein lysing effect helps in the formation of reparative dentin.Ref: Mannapalli ed 3 pg 80 