Which material is commonly used as a desensitizer in restorative dentistry?

• A. Cavit
• B. Amalgam
• C. GLUMA
• D. IRM

Answer: (C)

Dentin desensitizers work by sealing the dentinal tubules to stop fluid movement that triggers hypersensitivity. GLUMA is a well-known desensitizer because it contains glutaraldehyde and HEMA. Glutaraldehyde helps coagulate proteins inside the tubules, effectively occluding them, while HEMA can penetrate and form a resinous layer that further blocks tubules. This combination reduces dentin permeability and sensitivity, and it also provides a compatible surface for bonding agents used during restorative procedures.

Cavit is a temporary sealing material for cavities, not specifically aimed at reducing tubinular flow. IRM is a zinc oxide‑eugenol temporary restorative material with soothing effects on the pulp, but it isn’t used to desensitize dentin in the context of bonding. Amalgam is a restorative material itself, not a desensitizer.

So GLUMA is the material commonly used as a desensitizer in restorative dentistry.