On one hand, the presence of a ligamentous system and a joint capsule proves the existence of a diarthrodial joint
. On the other hand, the presence of a fibrous tissue connecting two irregular articular surfaces is characteristic of a synfibrosis.
Imaging of facet joint OA shows the typical radiological appearances of OA as seen in other diarthrodial joints
. Facet joint OA is most common in the L4-L5 and L5-S1 joints in the lower back and the C3-C5 mid cervical vertebral joints but rarely occurs in the thoracic spine.
The AC joint is a diarthrodial joint
with an intra-articular meniscus and a surrounding joint capsule.
Hip joint is a diarthrodial joint
allowing wide range of motion in extension, flexion, abduction and adduction.