The elbow’s stability depends on static and dynamic stabilizers.
Static stability is maintained by osseous and capsuloligamentous restraints, whereas muscles crossing the
elbow provide dynamic stability
4. O’Driscoll et al, the combination of static and dynamic stabilizers provides primary and secondary
constraints that prevent elbow instability
Primary constraints are the ulnohumeral articulations, the medial collateral ligaments (especially
the anterior bundle), and the lateral collateral ligament complex (especially the lateral ulnar
The secondary constraints are the radio humeral articulations, the common flexor-pronator tendons, the
common extensor tendons, and the capsule.