For the method of dental radiographs, the details are as follows: 1. Apical film: When tooth defect, pulpitis or periapical inflammation occurs, apical film can be taken. Place the slice on the lingual side of the tooth close to the tooth surface, and the x-ray can be perpendicular to the long axis of the tooth body and the angle bisector of the slice. 2.Obial slice: Place the slice between the upper and lower teeth, and the x-ray is perpendicular to the slice. 3.Mandibular transverse jaw slice: Fit the larger slice to the palatal mucosa, and use the ball tube to shoot at an angle of 45 degrees to the slice. 4.Whole-mouth surface tomogram: It can show all the teeth, periodontal tissue, the The patient stands upright naturally, looks straight ahead with both eyes, separates the upper and lower teeth, disengages from contact with the bulb, and rotates around the mouth for one week.