Cadaveric biomechanical study (n=10) testing whether simulated contraction of the long head of the biceps brachii reduces glenohumeral translation. Shoulders were tested in seven positions of elevation and rotation using standardized directional forces, with and without an air-cylinder–applied biceps force, after capsular venting to eliminate negative intra-articular pressure.
When planning biceps tenotomy or tenodesis in a patient with pre-existing glenohumeral instability or capsular laxity, recognize that the long head of the biceps is a meaningful secondary dynamic stabilizer — especially at lower arm positions and in internal rotation.
And its loss may worsen translation in an already-compromised shoulder.
Cadaveric biomechanical study (n=10) testing whether simulated contraction of the long head of the biceps brachii reduces glenohumeral translation. Shoulders were tested in seven positions of elevation and rotation using standardized directional forces, with and without an air-cylinder–applied biceps force, after capsular venting to eliminate negative intra-articular pressure.
When planning biceps tenotomy or tenodesis in a patient with pre-existing glenohumeral instability or capsular laxity, recognize that the long head of the biceps is a meaningful secondary dynamic stabilizer — especially at lower arm positions and in internal rotation.
And its loss may worsen translation in an already-compromised shoulder.