Which type of cement generates an exothermic reaction and should be mixed on a cool glass slab?

Zinc Phosphate cement is known for generating an exothermic reaction when it is mixed, which means it releases heat during the chemical process. This heat generation occurs because of the reaction between the powder and the liquid components of the cement. As a result, it is essential to mix this type of cement on a cool glass slab to help manage the temperature and prevent the cement from setting too quickly due to the heat produced.

Mixing on a cool surface allows for better control over the working time of the cement, ensuring that it remains workable for a sufficient period before it begins to set. This is particularly important in dental procedures where precise handling is necessary.

In contrast, other cement types mentioned in the options do not have the same exothermic properties and therefore do not require the same considerations regarding temperature during the mixing process. Understanding the unique characteristics of different cements helps dental assistants use them effectively while ensuring patient safety and optimal results in dental procedures.