| 摘要 |
The invention relates to dental devices for isolating a working area, comprising a substantially concave main piece having two upper ends and a substantially round edge on a lower area of the main piece, the round edge being adaptable to a patient's mouth; a substantially concave lower cover attached to the lower area of the main piece; two removable pieces each attached to each of the two upper ends of the main piece; and two upper covers each attached to each of the two removable pieces, the upper covers each having a protuberance to allow attachment of a rubber dam. Also provided are methods for providing isolation of a working area in a patient's mouth.
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