Patent ID: 7044738

Claim:
A substantially circular rubber dental dam, comprising: (a) a high density polyethylene membrane; (b) a resilient latex frame, the membrane being affixed to the frame, the frame being repeatedly deformable by hand manipulation to assume a desired shape, (c) a prepunched circular orifice, the prepunched circular orifice residing at a distance of approximately 0.5 inch from a membrane center, the prepunched circular orifice having a diameter of approximately 0.093 inch; and (d) a plane, the plane being defined by a diameter of the resilient latex frame, the membrane being affixed by an edge portion to the resilient latex frame, the membrane being dimensioned such that a central region of the membrane has a deformation residing outside of the plane, the deformation of the membrane being due entirely to a gravitational force displacing the central region of the membrane, thereby permitting the frame to rest upon a human face while the prepunched circular orifice surrounds a human tooth and the central region of the membrane extends into a human mouth while the membrane remains in a relatively untensioned state.