The oral tooth spreader for stomatology department examination comprises a fixed seat, spreading plates are hinged to the left side of the fixed seat, and the spreading plates are symmetrically distributed up and down relative to the center point of the fixed seat; a bidirectional
threaded rod and a telescopic rod are hinged to the left sides and the right sides of the opposite faces of the two opening plates correspondingly, movable sleeves are arranged on the outer sides of the two ends of the bidirectional
threaded rod in a sleeving mode, tooth grooves are formed in the right sides of the opposite faces of the two opening plates, and a rotary disc is fixedly arranged on the outer side of the middle of the bidirectional
threaded rod in a sleeving mode. According to the oral tooth
dilator for stomatology department examination, an instrument is placed in the
oral cavity of a patient, a
rotating disc is rotated, a bidirectional threaded rod rotates, two movable sleeves are driven to move oppositely, two dilating plates can rotate oppositely, the
oral cavity of the patient is dilated,
medical staff can conveniently examine the
oral cavity of the patient, meanwhile, a second air bag is expanded, and the oral cavity of the patient is dilated. Therefore, the comfort degree of the oral teeth of the patient when the oral teeth of the patient are opened is improved.