Oral cavity auxiliary support device for dental restoration

The oral cavity auxiliary supporting device comprises a head hoop, the upper portion of the head hoop is in threaded connection with a bolt through a threaded hole, a fixing cylinder is welded to the front end of a first telescopic rod, and supporting mechanisms capable of opening the oral cavity of a patient and facilitating diagnosis and treatment of a doctor are arranged on the rear sides of the tail ends of adjusting mechanisms. A rotating plate is welded to the outer end of the lead screw, and expansion rubber strips are welded to the upper end and the lower end of the second telescopic rod correspondingly. The saliva discharging mechanism comprises a connecting pipe connected to the inner side of the expansion rubber strip in a penetrating mode, a sleeve head is fixed to the tail end of the connecting pipe, a first one-way valve is installed on the inner side of the sleeve head, and a second one-way valve is installed on the upper portion of the inner side of the water discharging pipe. Compared with an