What should one avoid when working with zinc phosphate types due to its exothermic reaction?

When working with zinc phosphate types in dentistry, it is crucial to avoid mixing on a warm surface. Zinc phosphate has an exothermic reaction, which means it generates heat during the mixing and setting process. Mixing on a warm surface can elevate the temperature of the material, potentially accelerating the reaction. This can lead to an overly fast setting time, compromising the handling characteristics and resulting in a suboptimal bond strength.

The management of temperature is vital in ensuring that the material remains workable for the necessary duration to achieve the desired consistency and proper application. Therefore, avoiding a warm mixing surface is essential to maintain control over the exothermic reaction and ensure the integrity of the material during its workability phase.