Figure 2.

The TMJ quadruple radiograph from the same subject presented in Fig. 1. The images at the far left and far right showed the right and left TMJ condyles in the fossa when the mouth was closed; the condyles were superimposed by the surrounding bony structures. The images at the central left and central right showed the condyles out of the fossa when the mouth was widely opened. Even in this case when the TMJs were out of the fossa, it was still not easy for the examiners to judge if there were any osseous degenerative features in the TMJ condyles.