1.that is a strong moisture barrier, while preventing oral bacteria spread to the pulp, to avoid damage to the mouth of the tongue, mucous membranes and other soft tissue;
2. skin barrier can also reduce the blood, saliva splash, do AIDS, hepatitis and other related infectious diseases of general protection , to reduce cross-infection;
3. for the patient, the rubber dam can provide a safe, comfortable protection, so that during the treatment process do not have to pay attention to continue to open mouth or worry about their tongue, do not have to worry about debris or small oral instruments fall into the esophagus Or in the trachea, to create a more relaxed operative field;
4. to reduce and control the use of turbines containing water droplets containing micro-organisms and saliva, the patient does not have to contain water full of mouth;
5. separate teeth from soft tissue such as the tongue, Prevents misdiagnosis of soft tissue;
6. helps to observe the teeth directly, which is especially important when using a surgical microscope;
7. keep the operating area dry to prevent the formation of water mist on the mouth mirror;
8. provide a waterproof sealing effect, The safe use of sodium hypochlorite and other irrigants as a rinsing fluid 9 allows for faster and easier treatment.