What is a disadvantage of zinc polycarboxylate in dental applications?

Zinc polycarboxylate is known for its adhesive properties, particularly its ability to bond effectively to tooth structures and metal restorations. However, one of the disadvantages of using zinc polycarboxylate in dental applications is that it can be adhesive to stainless steel instruments. This adherence can lead to difficulties during the manipulation and application of the material, as it may stick to instruments, making it challenging for dental professionals to work efficiently.

The other options highlight characteristics that are not considered disadvantages. For instance, zinc polycarboxylate is appreciated for its excellent flexibility, which allows it to absorb stress and helps in its application to various dental situations. Additionally, it has a relatively normal setting time when compared to other types of cements, and while it can have some corrosive qualities, these are generally mild and not a primary concern during its use in dental practice. Hence, the aspect of its adhesive nature to stainless steel instruments stands out as a notable disadvantage.