Calcium hydroxide as liner
Calcium hydroxide is a thin dental liner placed near deep decay to protect the pulp and support a mineral barrier.
Why is calcium hydroxide used as a dental liner?
Calcium hydroxide is a thin dental liner placed near deep decay to protect the pulp and support a mineral barrier.
What is a liner’s role beneath a dental filling?
A liner is a very thin layer placed between a prepared tooth and its filling. Calcium hydroxide releases hydroxyl ions, creates an alkaline environment, and may encourage formation of hard tissue over a pulp that remains alive.
How is a liner placed near deep tooth decay?
The dentist removes infected dentine, leaves sound or carefully managed deep dentine near the pulp, and places the liner only where indicated. A base or bonded restoration then seals the cavity against saliva and bacteria.
When can deep decay symptoms require dental treatment?
Arrange an examination when deep decay causes lingering heat or cold pain, spontaneous pain, swelling, or tenderness when biting. These signs can indicate inflamed or infected pulp that a liner cannot treat.
What should you ask about pulp protection and the liner?
Ask how close the decay is to the pulp, whether a liner is indicated, and which material will cover it. Ask how the tooth will be sealed and what symptoms should prompt review.
Frequently asked questions
Is calcium hydroxide the filling itself?
No. It is a liner beneath the definitive filling or crown material.
Can a liner stop tooth pain?
It may protect a mildly irritated pulp, but persistent or spontaneous pain needs assessment for pulpal disease.
Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.