The following cavity bases are moisture sensitive:
- a. Polycarboxylate
- b. Zinc phosphate
- c. GI cem.***
- d. ZOE
- e. A, c.
The correct answer is e. A, c.
Both polycarboxylate and glass ionomer (GI) cement bases are moisture sensitive, while zinc phosphate and zinc oxide eugenol (ZOE) are not.
Polycarboxylate cement:
is a fast-setting material that is often used as a temporary filling or base. It is moisture sensitive and should not be placed in a wet environment. If polycarboxylate cement is exposed to moisture, it will not set properly and may cause sensitivity or discoloration of the tooth.
GI cement:
is another type of cement that is moisture sensitive. It is often used as a base for composite fillings or crowns. GI cement is also used as a sealant to protect the tooth from decay. Like polycarboxylate cement, GI cement should not be placed in a wet environment. If GI cement is exposed to moisture, it will not set properly and may not bond properly to the tooth.
Zinc phosphate cement:
is not moisture sensitive and can be placed in a wet environment. It is a strong and durable material that is often used as a base for crowns or bridges. However, zinc phosphate cement can be difficult to remove from the tooth, which can make it more difficult to replace the filling or crown in the future.
ZOE:
is not moisture sensitive and can also be placed in a wet environment. It is a soft and flexible material that is often used as a temporary filling or base. ZOE is also used as a sealant to protect the tooth from decay. However, ZOE can be discolored and may not be as aesthetically pleasing as other types of cement.
In summary, the two moisture-sensitive cavity bases are polycarboxylate and GI cement.
Labels
Community dentistry