Thomas Michael Tysse, 792415 Pebblebrook Dr, Grand Rapids, MI 49546

4695253, Sep 22, 1987

Mar 8, 1985

6/709891

Thomas M. Tysse - Grand Rapids MI

A61C 514

433136

An oral evacuation device and method is adapted for use in conjunction with a dam frame and a dam sheet, which overlie an operating area of the patient's mouth on which a selected procedure is to be performed. The oral evacuation device includes a hollow evacuation tube, having a first end shaped to communicate with a source of suction, and a second end which is flexible and has perforations along its length through which materials, such as saliva, debris, and the like are aspirated. The perforated end of the evacuation tube is threaded through two mating apertures in the dam sheet to form a flexible loop on the bottom side of the dam sheet. In use, the shape and orientation of the evacuation tube is adjusted to conform comfortably with the shape and oriientation of the patient's mouth, and extends into a rearward, lower portion of the patient's mouth in which saliva collects. A retainer holds the evacuation tube loop in the selected operating position such that throughout the operating procedure, the evacuation tube automatically and continuously removes saliva and the like directly from the lower portion of the patient's mouth for improved operating efficiency and increased patient comfort.