Cadaveric biomechanics study using stereophotogrammetry and tensile testing to characterize how the IGHL, articular congruence, and rotator cuff interact to stabilize the glenohumeral joint during active abduction — and what happens when the anterior capsule is pathologically or surgically tightened.
When planning anterior instability repair, overtightening the capsule shifts glenohumeral contact posteriorly and reduces contact area — titrate your repair to restore, not over-constrain, native laxity, or you risk trading instability for posterior glenoid arthrosis.
When a patient with a rotator cuff tear develops secondary instability, this paper explains why: loss of the dynamic centering force exposes the joint to larger translations that the static ligamentous restraints alone cannot control.
Cadaveric biomechanics study using stereophotogrammetry and tensile testing to characterize how the IGHL, articular congruence, and rotator cuff interact to stabilize the glenohumeral joint during active abduction — and what happens when the anterior capsule is pathologically or surgically tightened.
When planning anterior instability repair, overtightening the capsule shifts glenohumeral contact posteriorly and reduces contact area — titrate your repair to restore, not over-constrain, native laxity, or you risk trading instability for posterior glenoid arthrosis.
When a patient with a rotator cuff tear develops secondary instability, this paper explains why: loss of the dynamic centering force exposes the joint to larger translations that the static ligamentous restraints alone cannot control.