What photographic method is used to photograph dislocation of temporomandibular joint?

(1) lateral fault closed position: ① The contrast agent is S-shaped, with thin middle and thick ends. The front is the anterior superior recess; Posterior superior recess; ② The articular disc is located between the contrast agent and condyle, and the posterior edge is flat with the transverse ridge of condyle. Open position: ① the anterior superior recess disappeared and the posterior superior recess expanded obviously, occupying the whole articular fossa; ② The anterior part of the lower edge of the contrast medium shows the image of the three-zone boundary of the articular disc, and the middle zone faces the transverse ridge. (2) Shule position (Xue's position) closed position: ① (similar to lateral fault, that is, the contrast agent is S-shaped, with thin middle and thick ends. The front is the anterior superior recess; Posterior superior recess); But the anterior superior recess and the posterior superior recess are smaller than those of the fault. ② The contrast agent in the middle and inside of the superior cavity forms a half-moon shadow, covering a part of the condyle. Open position: ① the anterior superior recess disappeared and the posterior superior recess expanded obviously, occupying the whole articular fossa; ② The anterior part of the lower edge of the contrast medium shows the image of the three-zone boundary of the articular disc, and the middle zone faces the transverse ridge.