What is a dental dam?
An elastic sheet separating the treated tooth from the rest of the mouth.
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Why is a tooth isolated with a sheet?
A dental dam is a thin elastic sheet that separates selected teeth from the rest of the mouth. It keeps saliva away from the working area and creates a protected environment for suitable treatments.
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The tooth stays accessible
The treated tooth projects through a suitable opening in the sheet. The rest of the mouth is separated from the working area.
Keep saliva outside the field
During root canal treatment, isolation helps protect the tooth from renewed contamination by saliva.
An aid with a protective role
The sheet forms a barrier between the working area and the mouth. Its fit and tolerance are checked; discomfort should be reported.
At a glance
What is it used for?
Among other purposes, to provide a protected, saliva-free working field during root canal treatment.
How does it work?
The tooth stays accessible through a suitable opening; the sheet forms a barrier around it.
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Often confused
Dental dam or suction?
Suction removes liquid. A dental dam also separates the tooth from the rest of the mouth with a barrier.
Quick answers
Does the sheet itself treat the tooth?
No. It does not treat disease. It supports the conditions for the actual procedure.
Is a dental dam part of root canal treatment?
Isolation is an important part of properly performed root canal treatment.
What if I have a material allergy?
Known material allergies should be mentioned beforehand so that a suitable material can be selected.
At the practice
For your consultation
A question to discuss with Dr. med. dent. Niusha Barahmand Pour:
How will the working area be protected during my planned treatment?
The profile lists further training in endodontics as part of the dentist's background.
Questions about root canal treatment can be discussed before the procedure.
Discuss the treatment processChoose an appointment on DoctolibLearning for dental trainees & teamsUnderstand clinical terms and build your knowledge
Build on the simple explanation with clinical terms, key distinctions and a knowledge question.
- Isolation
- Separating the treated tooth from the rest of the mouth.
- Moisture control
- Keeping moisture away from the working area.
- Barrier
- A protective separation between two areas.
Know the difference
Suction removes fluid; a dental dam additionally creates a physical separation.
Sources for further learning
Sources and context
Editorial research: 23 October 2026. This explanation covers general principles and does not replace a personal examination. Suitable treatment is discussed following individual assessment.