Types of Synovial joints
Hinge: Hinge joints (Figure a) are uniaxial, like the hinge on a door. Their movement is restricted to one plane by the shape of the opposing articular surfaces, as well as the strong collateral ligaments along the sides of the joint.E.g.The knee joint
Gliding: Gliding joints (Figure b) are uniaxial. Their articular surfaces are flat and glide over each other.E.g. The intercarpal bones.
Pivot: Pivot joints (Figure c) are uniaxial and consist of a bony pivot (projection) within an osteo ligamentous ring.E.g. The superior radioulnar joint.
Saddle: Saddle joints (Figure a) are biaxial, with both bones possessing concavoconvex surfaces, which means that each surface is concave in one direction and convex in the other direction.E.g. The carpometacarpal joint of the thumb.
Condyloid: Condyloid joints (Figure b) are biaxial, with a convex condyle that fits into a concave surface. They do not allow rotation.E.g. The metacarpophalangeal joints.
Ball and socket: Ball and socket joints (Figure c) are multiaxial and the most flexible joints in the body. They consist of a hemispherical head that fits into a cup-like depression.E.g. The glenohumeral joint.